Convert.ToUInt64 Metodo

Definizione

Spazio dei nomi:

System

Assembly:

System.Runtime.dll

Converte un valore specificato in un intero senza segno a 64 bit.

Overload

ToUInt64(String)	Converte la rappresentazione di stringa specificata di un numero in un intero senza segno a 64 bit equivalente.
ToUInt64(UInt16)	Converte il valore dell'intero senza segno a 16 bit specificato nell'intero senza segno a 64 bit equivalente.
ToUInt64(UInt32)	Converte l'intero senza segno a 32 bit specificato in un equivalente intero senza segno a 64 bit.
ToUInt64(String, IFormatProvider)	Converte la rappresentazione di stringa specificata di un numero in un intero senza segno a 64 bit equivalente mediante le informazioni di formattazione specifiche delle impostazioni cultura indicate.
ToUInt64(Object, IFormatProvider)	Converte il valore dell'oggetto specificato in un intero senza segno a 64 bit mediante le informazioni di formattazione specifiche delle impostazioni cultura indicate.
ToUInt64(Single)	Converte il valore del numero a virgola mobile a precisione singola specificato in un intero senza segno a 64 bit equivalente.
ToUInt64(String, Int32)	Converte la rappresentazione di stringa di un numero in una base specificata nell'intero senza segno a 64 bit equivalente.
ToUInt64(UInt64)	Restituisce l'intero senza segno a 64 bit specificato; non viene eseguita alcuna conversione effettiva.
ToUInt64(SByte)	Converte il valore dell'intero con segno a 8 bit specificato nell'intero senza segno a 64 bit equivalente.
ToUInt64(Int16)	Converte il valore dell'intero con segno a 16 bit specificato nell'intero senza segno a 64 bit equivalente.
ToUInt64(Int64)	Converte il valore dell'intero con segno a 64 bit specificato in un intero senza segno a 64 bit equivalente.
ToUInt64(Int32)	Converte il valore dell'intero con segno a 32 bit specificato in un intero senza segno a 64 bit equivalente.
ToUInt64(Double)	Converte il valore del numero a virgola mobile e con precisione doppia specificato in un intero senza segno a 64 bit equivalente.
ToUInt64(Decimal)	Converte il valore del numero decimale specificato in un intero senza segno a 64 bit equivalente.
ToUInt64(DateTime)	La chiamata di questo metodo genera sempre un'eccezione InvalidCastException.
ToUInt64(Char)	Converte il valore del carattere Unicode specificato nell'intero senza segno a 64 bit equivalente.
ToUInt64(Byte)	Converte il valore dell'intero senza segno a 8 bit specificato nell'intero senza segno a 64 bit equivalente.
ToUInt64(Boolean)	Converte il valore booleano specificato nell'intero senza segno a 64 bit equivalente.
ToUInt64(Object)	Converte il valore dell'oggetto specificato in un intero senza segno a 64 bit.

ToUInt64(String)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte la rappresentazione di stringa specificata di un numero in un intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(System::String ^ value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string? value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : string -> uint64

Public Shared Function ToUInt64 (value As String) As ULong

Parametri

value

String

Stringa che contiene il numero da convertire.

Restituisce

UInt64

Intero con segno a 64 bit equivalente al numero in value oppure 0 (zero) se value è null.

Attributi

CLSCompliantAttribute

Eccezioni

FormatException

value non è costituito da un segno facoltativo seguito da una sequenza di cifre (da 0 a 9).

OverflowException

value rappresenta un numero minore di UInt64.MinValue o maggiore di UInt64.MaxValue.

Esempio

Nell'esempio seguente vengono interpretati gli elementi di una matrice di stringhe come stringhe numeriche e si tenta di convertirli in interi lunghi senza segno.

string[] values = { "One", "1.34e28", "-26.87", "-18", "-6.00",
                    " 0", "137", "1601.9", Int32.MaxValue.ToString() };
ulong result;

foreach (string value in values)
{
   try {
      result = Convert.ToUInt64(value);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        value.GetType().Name, value, result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt64 type.", value);
   }
   catch (FormatException) {
      Console.WriteLine("The {0} value '{1}' is not in a recognizable format.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    The String value 'One' is not in a recognizable format.
//    The String value '1.34e28' is not in a recognizable format.
//    The String value '-26.87' is not in a recognizable format.
//    -18 is outside the range of the UInt64 type.
//    The String value '-6.00' is not in a recognizable format.
//    Converted the String value ' 0' to the UInt64 value 0.
//    Converted the String value '137' to the UInt64 value 137.
//    The String value '1601.9' is not in a recognizable format.
//    Converted the String value '2147483647' to the UInt64 value 2147483647.

let values =
    [| "1603"; "1,603"; "one"; "1.6e03"
       "1.2e-02"; "-1326"; "1074122" |]

for value in values do
    try
        let result = Convert.ToUInt16 value
        printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
    with
    | :? FormatException ->
        printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
    | :? OverflowException ->
        printfn $"{value} is outside the range of the UInt64 type." 
// The example displays the following output:
//    Converted the String value '1603' to the UInt64 value 1603.
//    The String value 1,603 is not in a recognizable format.
//    The String value one is not in a recognizable format.
//    The String value 1.6e03 is not in a recognizable format.
//    The String value 1.2e-02 is not in a recognizable format.
//    -1326 is outside the range of the UInt64 type.
//    1074122 is outside the range of the UInt64 type.

Dim values() As String = { "One", "1.34e28", "-26.87", "-18", "-6.00", _
                           " 0", "137", "1601.9", Int32.MaxValue.ToString() }
Dim result As ULong

For Each value As String In values
   Try
      result = Convert.ToUInt64(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("{0} is outside the range of the UInt64 type.", value)
   Catch e As FormatException
      Console.WriteLine("The {0} value '{1}' is not in a recognizable format.", _
                        value.GetType().Name, value)
   End Try   
Next                                 
' The example displays the following output:
'    The String value 'One' is not in a recognizable format.
'    The String value '1.34e28' is not in a recognizable format.
'    The String value '-26.87' is not in a recognizable format.
'    -18 is outside the range of the UInt64 type.
'    The String value '-6.00' is not in a recognizable format.
'    Converted the String value ' 0' to the UInt64 value 0.
'    Converted the String value '137' to the UInt64 value 137.
'    The String value '1601.9' is not in a recognizable format.
'    Converted the String value '2147483647' to the UInt64 value 2147483647.

Commenti

L'uso del ToInt64(String) metodo equivale al passaggio value al Int64.Parse(String) metodo. value viene interpretato usando le convenzioni di formattazione delle impostazioni cultura correnti.

Se si preferisce non gestire un'eccezione se la conversione ha esito negativo, è possibile chiamare invece il UInt64.TryParse metodo. Restituisce un Boolean valore che indica se la conversione ha avuto esito positivo o negativo.

ToUInt64(UInt16)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore dell'intero senza segno a 16 bit specificato nell'intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(System::UInt16 value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (ushort value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : uint16 -> uint64

Public Shared Function ToUInt64 (value As UShort) As ULong

Parametri

value

UInt16

Intero senza segno a 16 bit da convertire.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value.

Attributi

CLSCompliantAttribute

Esempio

Nell'esempio seguente ogni elemento viene convertito in una matrice di interi senza segno a 16 bit in un intero lungo senza segno.

ushort[] numbers = { UInt16.MinValue, 121, 340, UInt16.MaxValue };
ulong result;

foreach (ushort number in numbers)
{
   try {
      result = Convert.ToUInt64(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt16 value 0 to the UInt64 value 0.
//    Converted the UInt16 value 121 to the UInt64 value 121.
//    Converted the UInt16 value 340 to the UInt64 value 340.
//    Converted the UInt16 value 65535 to the UInt64 value 65535.

let numbers = [| UInt16.MinValue; 121us; 340us; UInt16.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
                        
// The example displays the following output:
//    Converted the UInt16 value '0' to the UInt64 value 0.
//    Converted the UInt16 value '121' to the UInt64 value 121.
//    Converted the UInt16 value '340' to the UInt64 value 340.
//    The UInt16 value 65535 is outside the range of the UInt64 type.

Dim numbers() As UShort = { UInt16.MinValue, 121, 340, UInt16.MaxValue }
Dim result As ULong

For Each number As UShort In numbers
   result = Convert.ToUInt64(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                     number.GetType().Name, number, _
                     result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt16 value 0 to the UInt64 value 0.
'    Converted the UInt16 value 121 to the UInt64 value 121.
'    Converted the UInt16 value 340 to the UInt64 value 340.
'    Converted the UInt16 value 65535 to the UInt64 value 65535.

ToUInt64(UInt32)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte l'intero senza segno a 32 bit specificato in un equivalente intero senza segno a 64 bit.

public:
 static System::UInt64 ToUInt64(System::UInt32 value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (uint value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : uint32 -> uint64

Public Shared Function ToUInt64 (value As UInteger) As ULong

Parametri

value

UInt32

Intero senza segno a 32 bit da convertire.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value.

Attributi

CLSCompliantAttribute

Esempio

Nell'esempio seguente ogni elemento viene convertito in una matrice integer senza segno in un intero lungo senza segno.

uint[] numbers = { UInt32.MinValue, 121, 340, UInt32.MaxValue };
ulong result;

foreach (uint number in numbers)
{
   try {
      result = Convert.ToUInt64(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt32 value 0 to the UInt64 value 0.
//    Converted the UInt32 value 121 to the UInt64 value 121.
//    Converted the UInt32 value 340 to the UInt64 value 340.
//    Converted the UInt32 value 4294967295 to the UInt64 value 4294967295.

let numbers = [| UInt32.MinValue; 121u; 340u; UInt32.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
// The example displays the following output:
//    Converted the UInt32 value '0' to the UInt64 value 0.
//    Converted the UInt64 value '121' to the UInt64 value 121.
//    Converted the UInt64 value '340' to the UInt64 value 340.
//    The UInt32 value 4294967295 is outside the range of the UInt64 type.

Dim numbers() As UInteger = { UInt32.MinValue, 121, 340, UInt32.MaxValue }
Dim result As ULong

For Each number As UInteger In numbers
   result = Convert.ToUInt64(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                     number.GetType().Name, number, _
                     result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt32 value 0 to the UInt64 value 0.
'    Converted the UInt32 value 121 to the UInt64 value 121.
'    Converted the UInt32 value 340 to the UInt64 value 340.
'    Converted the UInt32 value 4294967295 to the UInt64 value 4294967295.

ToUInt64(String, IFormatProvider)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte la rappresentazione di stringa specificata di un numero in un intero senza segno a 64 bit equivalente mediante le informazioni di formattazione specifiche delle impostazioni cultura indicate.

public:
 static System::UInt64 ToUInt64(System::String ^ value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string? value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToUInt64 : string * IFormatProvider -> uint64

Public Shared Function ToUInt64 (value As String, provider As IFormatProvider) As ULong

Parametri

value

String

Stringa che contiene il numero da convertire.

provider

IFormatProvider

Oggetto che fornisce informazioni di formattazione specifiche delle impostazioni cultura.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente al numero in value oppure 0 (zero) se value è null.

Attributi

CLSCompliantAttribute

Eccezioni

FormatException

value non è costituito da un segno facoltativo seguito da una sequenza di cifre (da 0 a 9).

OverflowException

value rappresenta un numero minore di UInt64.MinValue o maggiore di UInt64.MaxValue.

Esempio

Nell'esempio seguente viene definito un oggetto personalizzato NumberFormatInfo che riconosce la stringa "pos" come segno positivo e la stringa "neg" come segno negativo. Tenta quindi di convertire ogni elemento di una matrice stringa numerica in un intero lungo senza segno. La conversione usa sia il provider personalizzato che il NumberFormatInfo provider per le impostazioni cultura invarianti.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      // Create a NumberFormatInfo object and set several properties.
      NumberFormatInfo provider = new NumberFormatInfo();
      provider.PositiveSign = "pos ";
      provider.NegativeSign = "neg ";

      // Define an array of numeric strings.
      string[] values = { "123456789012", "+123456789012",
                          "pos 123456789012", "123456789012.",
                          "123,456,789,012", "18446744073709551615",
                          "18446744073709551616", "neg 1", "-1" };
      //  Convert the strings using the format provider.
      foreach (string value in values)
      {
         Console.Write("{0,-20}  -->  ", value);
         try {
            Console.WriteLine("{0,20}", Convert.ToUInt64(value, provider));
         }
         catch (FormatException) {
            Console.WriteLine("{0,20}", "Invalid Format");
         }
         catch (OverflowException) {
            Console.WriteLine("{0,20}", "Numeric Overflow");
         }
      }
   }
}
// The example displays the following output:
//    123456789012          -->          123456789012
//    +123456789012         -->        Invalid Format
//    pos 123456789012      -->          123456789012
//    123456789012.         -->        Invalid Format
//    123,456,789,012       -->        Invalid Format
//    18446744073709551615  -->  18446744073709551615
//    18446744073709551616  -->      Numeric Overflow
//    neg 1                 -->      Numeric Overflow
//    -1                    -->        Invalid Format

open System
open System.Globalization

// Create a NumberFormatInfo object and set several properties.
let provider = NumberFormatInfo()
provider.PositiveSign <- "pos "
provider.NegativeSign <- "neg "

// Define an array of numeric strings.
let values =
    [| "123456789012"; "+123456789012"
       "pos 123456789012"; "123456789012."
       "123,456,789,012"; "18446744073709551615"
       "18446744073709551616"; "neg 1"; "-1" |]

// Convert the strings using the format provider.
for value in values do
    printf $"{value,-20}  -->  "
    try
        printfn $"{Convert.ToUInt64(value, provider),20}"
    with
    | :? FormatException ->
        printfn "%20s" "Invalid Format"
    | :? OverflowException ->
        printfn "%20s" "Numeric Overflow"
// The example displays the following output:
//    123456789012          -->          123456789012
//    +123456789012         -->        Invalid Format
//    pos 123456789012      -->          123456789012
//    123456789012.         -->        Invalid Format
//    123,456,789,012       -->        Invalid Format
//    18446744073709551615  -->  18446744073709551615
//    18446744073709551616  -->      Numeric Overflow
//    neg 1                 -->      Numeric Overflow
//    -1                    -->        Invalid Format

Imports System.Globalization

Module Example
   Public Sub Main()
      ' Create a NumberFormatInfo object and set several properties.
      Dim provider As New NumberFormatInfo()
      provider.PositiveSign = "pos "
      provider.NegativeSign = "neg "

      ' Define an array of numeric strings.
      Dim values() As String = { "123456789012", "+123456789012", _
                                 "pos 123456789012", "123456789012.", _
                                 "123,456,789,012", "18446744073709551615", _
                                 "18446744073709551616", "neg 1", "-1" }
      '  Convert the strings using the format provider.
      For Each value As String In values
         Console.Write("{0,-20}  -->  ", value)
         Try
            Console.WriteLine("{0,20}", Convert.ToUInt64(value, provider))
         Catch e As FormatException
            Console.WriteLine("{0,20}", "Invalid Format")
         Catch e As OverflowException
            Console.WriteLine("{0,20}", "Numeric Overflow")
         End Try               
      Next
    End Sub 
End Module 
' The example displays the following output:
'    123456789012          -->          123456789012
'    +123456789012         -->        Invalid Format
'    pos 123456789012      -->          123456789012
'    123456789012.         -->        Invalid Format
'    123,456,789,012       -->        Invalid Format
'    18446744073709551615  -->  18446744073709551615
'    18446744073709551616  -->      Numeric Overflow
'    neg 1                 -->      Numeric Overflow
'    -1                    -->        Invalid Format

Commenti

Il valore restituito è il risultato di richiamare UInt64.Parse su value.

provider è un'implementazione IFormatProvider che ottiene un NumberFormatInfo oggetto. L'oggetto NumberFormatInfo fornisce informazioni specifiche delle impostazioni cultura sul formato di value. Se provider è null, viene usato l'oggetto NumberFormatInfo per le impostazioni cultura correnti.

Se si preferisce non gestire un'eccezione se la conversione ha esito negativo, è possibile chiamare invece il UInt64.TryParse metodo. Restituisce un Boolean valore che indica se la conversione ha avuto esito positivo o negativo.

ToUInt64(Object, IFormatProvider)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore dell'oggetto specificato in un intero senza segno a 64 bit mediante le informazioni di formattazione specifiche delle impostazioni cultura indicate.

public:
 static System::UInt64 ToUInt64(System::Object ^ value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (object? value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToUInt64 : obj * IFormatProvider -> uint64

Public Shared Function ToUInt64 (value As Object, provider As IFormatProvider) As ULong

Parametri

value

Object

Oggetto che implementa l'interfaccia IConvertible.

provider

IFormatProvider

Oggetto che fornisce informazioni di formattazione specifiche delle impostazioni cultura.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value oppure zero se value è null.

Attributi

CLSCompliantAttribute

Eccezioni

FormatException

Il formato di value non è appropriato.

InvalidCastException

value non implementa l'interfaccia IConvertible.

-oppure-

La conversione non è supportata.

OverflowException

value rappresenta un numero minore di UInt64.MinValue o maggiore di UInt64.MaxValue.

Esempio

Nell'esempio seguente viene definita una HexString classe che implementa l'interfaccia e che è progettata per contenere la IConvertible rappresentazione di stringa sia con segno a 64 bit che con segno a 64 bit. La classe include una Sign proprietà che indica il segno del valore esadecimale.

using System;
using System.Globalization;
using System.Text.RegularExpressions;

public enum SignBit { Negative=-1, Zero=0, Positive=1 };

public struct HexString : IConvertible
{
   private SignBit signBit;
   private string hexString;

   public SignBit Sign
   {
      set { signBit = value; }
      get { return signBit; }
   }

   public string Value
   {
      set
      {
         if (value.Trim().Length > 16)
            throw new ArgumentException("The hexadecimal representation of a 64-bit integer cannot have more than 16 characters.");
         else if (! Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase))
            throw new ArgumentException("The hexadecimal representation of a 64-bit integer contains invalid characters.");
         else
            hexString = value;
      }
      get { return hexString; }
   }

   // IConvertible implementations.
   public TypeCode GetTypeCode()
   {
      return TypeCode.Object;
   }

   public bool ToBoolean(IFormatProvider provider)
   {
      return signBit != SignBit.Zero;
   }

   public byte ToByte(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToInt64(hexString, 16)));
      else
         try {
            return Byte.Parse(hexString, NumberStyles.HexNumber);
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToUInt64(hexString, 16)), e);
         }
   }

   public char ToChar(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToInt64(hexString, 16)));

      try {
         ushort codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber);
         return Convert.ToChar(codePoint);
      }
      catch (OverflowException) {
         throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToUInt64(hexString, 16)));
      }
   }

   public DateTime ToDateTime(IFormatProvider provider)
   {
      throw new InvalidCastException("Hexadecimal to DateTime conversion is not supported.");
   }

   public decimal ToDecimal(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
      {
         long hexValue = Int64.Parse(hexString, NumberStyles.HexNumber);
         return Convert.ToDecimal(hexValue);
      }
      else
      {
         ulong hexValue = UInt64.Parse(hexString, NumberStyles.HexNumber);
         return Convert.ToDecimal(hexValue);
      }
   }

   public double ToDouble(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToDouble(Int64.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToDouble(UInt64.Parse(hexString, NumberStyles.HexNumber));
   }

   public short ToInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToInt16(Int64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToInt64(hexString, 16)), e);
         }
      else
         try {
            return Convert.ToInt16(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt64(hexString, 16)), e);
         }
   }

   public int ToInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToInt32(Int64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt64(hexString, 16)), e);
         }
      else
         try {
            return Convert.ToInt32(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt64(hexString, 16)), e);
         }
   }

   public long ToInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Int64.Parse(hexString, NumberStyles.HexNumber);
      else
         try {
            return Convert.ToInt64(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int64 type.", Convert.ToUInt64(hexString, 16)), e);
         }
   }

   public sbyte ToSByte(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToSByte(Int64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                      Int64.Parse(hexString, NumberStyles.HexNumber), e));
         }
      else
         try {
            return Convert.ToSByte(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                    UInt64.Parse(hexString, NumberStyles.HexNumber)), e);
         }
   }

   public float ToSingle(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToSingle(Int64.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToSingle(UInt64.Parse(hexString, NumberStyles.HexNumber));
   }

   public string ToString(IFormatProvider provider)
   {
      return "0x" + this.hexString;
   }

   public object ToType(Type conversionType, IFormatProvider provider)
   {
      switch (Type.GetTypeCode(conversionType))
      {
         case TypeCode.Boolean:
            return this.ToBoolean(null);
         case TypeCode.Byte:
            return this.ToByte(null);
         case TypeCode.Char:
            return this.ToChar(null);
         case TypeCode.DateTime:
            return this.ToDateTime(null);
         case TypeCode.Decimal:
            return this.ToDecimal(null);
         case TypeCode.Double:
            return this.ToDouble(null);
         case TypeCode.Int16:
            return this.ToInt16(null);
         case TypeCode.Int32:
            return this.ToInt32(null);
         case TypeCode.Int64:
            return this.ToInt64(null);
         case TypeCode.Object:
            if (typeof(HexString).Equals(conversionType))
               return this;
            else
               throw new InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name));
         case TypeCode.SByte:
            return this.ToSByte(null);
         case TypeCode.Single:
            return this.ToSingle(null);
         case TypeCode.String:
            return this.ToString(null);
         case TypeCode.UInt16:
            return this.ToUInt16(null);
         case TypeCode.UInt32:
            return this.ToUInt32(null);
         case TypeCode.UInt64:
            return this.ToUInt64(null);
         default:
            throw new InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name));
      }
   }

   public ushort ToUInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt16 type.",
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)));
      else
         try {
            return Convert.ToUInt16(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt64(hexString, 16)), e);
         }
   }

   public uint ToUInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)));
      else
         try {
            return Convert.ToUInt32(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException) {
            throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
                                                      UInt64.Parse(hexString, NumberStyles.HexNumber)));
         }
   }

   public ulong ToUInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt64 type.",
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt64(hexString, 16);
   }
}

open System
open System.Globalization
open System.Text.RegularExpressions

type SignBit =
    | Negative = -1
    | Zero = 0
    | Positive = 1

[<Struct>]
type HexString =
    val mutable private hexString: string

    val mutable Sign: SignBit

    member this.Value
        with get () = this.hexString
        and set (value: string) =
            if value.Trim().Length > 16 then
                invalidArg "value" "The hexadecimal representation of a 64-bit integer cannot have more than 16 characters."
            elif Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase) |> not then
                invalidArg "value" "The hexadecimal representation of a 64-bit integer contains invalid characters."
            else
                this.hexString <- value

    // IConvertible implementations.
    interface IConvertible with
        member _.GetTypeCode() =
            TypeCode.Object

        member this.ToBoolean(provider: IFormatProvider) =
            this.Sign <> SignBit.Zero

        member this.ToByte(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Convert.ToInt64(this.hexString, 16)} is out of range of the Byte type.")
            try
                Byte.Parse(this.hexString, NumberStyles.HexNumber)
            with :? OverflowException as e ->
                raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Byte type.", e) )

        member this.ToChar(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Convert.ToInt64(this.hexString, 16)} is out of range of the Char type.")
            try
                let codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber)
                Convert.ToChar codePoint
            with :? OverflowException ->
                raise (OverflowException $"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Char type.")

        member this.ToDateTime(provider: IFormatProvider) =
            raise (InvalidCastException "Hexadecimal to DateTime conversion is not supported.")

        member this.ToDecimal(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                let hexValue = Int64.Parse(this.hexString, NumberStyles.HexNumber)
                Convert.ToDecimal hexValue
            else
                let hexValue = UInt64.Parse(this.hexString, NumberStyles.HexNumber)
                Convert.ToDecimal hexValue

        member this.ToDouble(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Convert.ToDouble(Int64.Parse(this.hexString, NumberStyles.HexNumber))
            else
                Convert.ToDouble(UInt64.Parse(this.hexString, NumberStyles.HexNumber))

        member this.ToInt16(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                try
                    Convert.ToInt16(Int64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToInt64(this.hexString, 16)} is out of range of the Int16 type.", e) )
            else
                try
                    Convert.ToInt16(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Int16 type.", e) )

        member this.ToInt32(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                try
                    Convert.ToInt32(Int64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Int32 type.", e) )
            else
                try
                    Convert.ToInt32(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Int32 type.", e) )

        member this.ToInt64(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Int64.Parse(this.hexString, NumberStyles.HexNumber)
            else
                try
                    Convert.ToInt64(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Int64 type.", e) )

        member this.ToSByte(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                try
                    Convert.ToSByte(Int64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e) )
            else
                try
                    Convert.ToSByte(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{UInt64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e) )

        member this.ToSingle(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Convert.ToSingle(Int64.Parse(this.hexString, NumberStyles.HexNumber))
            else
                Convert.ToSingle(UInt64.Parse(this.hexString, NumberStyles.HexNumber))

        member this.ToString(provider: IFormatProvider) =
            "0x" + this.hexString

        member this.ToType(conversionType: Type, provider: IFormatProvider) =
            let this = this :> IConvertible
            match Type.GetTypeCode conversionType with
            | TypeCode.Boolean ->
                this.ToBoolean null
            | TypeCode.Byte ->
                this.ToByte null
            | TypeCode.Char ->
                this.ToChar null
            | TypeCode.DateTime ->
                this.ToDateTime null
            | TypeCode.Decimal ->
                this.ToDecimal null
            | TypeCode.Double ->
                this.ToDouble null
            | TypeCode.Int16 ->
                this.ToInt16 null
            | TypeCode.Int32 ->
                this.ToInt32 null
            | TypeCode.Int64 ->
                this.ToInt64 null
            | TypeCode.Object ->
                if typeof<HexString>.Equals conversionType then
                    this
                else
                    raise (InvalidCastException $"Conversion to a {conversionType.Name} is not supported.")
            | TypeCode.SByte ->
                this.ToSByte null
            | TypeCode.Single ->
                this.ToSingle null
            | TypeCode.String ->
                this.ToString null
            | TypeCode.UInt16 ->
                this.ToUInt16 null
            | TypeCode.UInt32 ->
                this.ToUInt32 null
            | TypeCode.UInt64 ->
                this.ToUInt64 null
            | _ ->
                raise (InvalidCastException $"Conversion to {conversionType.Name} is not supported.")

        member this.ToUInt16(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt16 type.")
            else
                try
                    Convert.ToUInt16(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the UInt16 type.", e) )

        member this.ToUInt32(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")
            else
                try
                    Convert.ToUInt32(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException ->
                    raise (OverflowException $"{UInt64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")

        member this.ToUInt64(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt64 type.")
            else
                Convert.ToUInt64(this.hexString, 16)

Imports System.Globalization
Imports System.Text.RegularExpressions

Public Enum SignBit As Integer
   Positive = 1
   Zero = 0
   Negative = -1
End Enum

Public Structure HexString : Implements IConvertible
   Private signBit As SignBit
   Private hexString As String
   
   Public Property Sign As SignBit
      Set
         signBit = value
      End Set
      Get
         Return signBit
      End Get
   End Property
   
   Public Property Value As String
      Set
         If value.Trim().Length > 16 Then
            Throw New ArgumentException("The hexadecimal representation of a 64-bit integer cannot have more than 16 characters.")
         ElseIf Not Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase) Then
            Throw New ArgumentException("The hexadecimal representation of a 64-bit integer contains invalid characters.")             
         Else
            hexString = value
         End If   
      End Set
      Get
         Return hexString
      End Get
   End Property
   
   ' IConvertible implementations.
   Public Function GetTypeCode() As TypeCode _
                   Implements IConvertible.GetTypeCode
      Return TypeCode.Object
   End Function
   
   Public Function ToBoolean(provider As IFormatProvider) As Boolean _
                   Implements IConvertible.ToBoolean
      Return signBit <> SignBit.Zero
   End Function 
   
   Public Function ToByte(provider As IFormatProvider) As Byte _
                   Implements IConvertible.ToByte
      If signBit = SignBit.Negative Then
         Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToInt64(hexString, 16))) 
      Else
         Try
            Return Byte.Parse(hexString, NumberStyles.HexNumber)
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToUInt64(hexString, 16)), e)
         End Try   
      End If       
   End Function
   
   Public Function ToChar(provider As IFormatProvider) As Char _
                   Implements IConvertible.ToChar
      If signBit = SignBit.Negative Then 
         Throw New OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToInt64(hexString, 16)))
      End If
      
      Try
         Dim codePoint As UInt16 = UInt16.Parse(Me.hexString, NumberStyles.HexNumber)
         Return Convert.ToChar(codePoint)
      Catch e As OverflowException
         Throw New OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToUInt64(hexString, 16)))
      End Try      
   End Function 
   
   Public Function ToDateTime(provider As IFormatProvider) As Date _
                   Implements IConvertible.ToDateTime
      Throw New InvalidCastException("Hexadecimal to DateTime conversion is not supported.")
   End Function
   
   Public Function ToDecimal(provider As IFormatProvider) As Decimal _
                   Implements IConvertible.ToDecimal
      If signBit = SignBit.Negative Then
         Dim hexValue As Long = Int64.Parse(hexString, NumberStyles.HexNumber)
         Return Convert.ToDecimal(hexValue)
      Else
         Dim hexValue As ULong = UInt64.Parse(hexString, NumberStyles.HexNumber)
         Return Convert.ToDecimal(hexValue)
      End If
   End Function
   
   Public Function ToDouble(provider As IFormatProvider) As Double _
                   Implements IConvertible.ToDouble
      If signBit = SignBit.Negative Then
         Return Convert.ToDouble(Int64.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToDouble(UInt64.Parse(hexString, NumberStyles.HexNumber))
      End If   
   End Function   
   
   Public Function ToInt16(provider As IFormatProvider) As Int16 _
                   Implements IConvertible.ToInt16
      If signBit = SignBit.Negative Then
         Try
            Return Convert.ToInt16(Int64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToInt64(hexString, 16)), e)
         End Try
      Else
         Try
            Return Convert.ToInt16(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt64(hexString, 16)), e)
         End Try
      End If   
   End Function
   
   Public Function ToInt32(provider As IFormatProvider) As Int32 _
                   Implements IConvertible.ToInt32
      If signBit = SignBit.Negative Then
         Try
            Return Convert.ToInt32(Int64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt64(hexString, 16)), e)
         End Try
      Else
         Try
            Return Convert.ToInt32(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt64(hexString, 16)), e)
         End Try   
      End If   
   End Function
   
   Public Function ToInt64(provider As IFormatProvider) As Int64 _
                   Implements IConvertible.ToInt64
      If signBit = SignBit.Negative Then
         Return Int64.Parse(hexString, NumberStyles.HexNumber)
      Else
         Try
            Return Convert.ToInt64(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int64 type.", Convert.ToUInt64(hexString, 16)), e)
         End Try
      End If   
   End Function
   
   Public Function ToSByte(provider As IFormatProvider) As SByte _
                   Implements IConvertible.ToSByte
      If signBit = SignBit.Negative Then
         Try
            Return Convert.ToSByte(Int64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
                                                      Int64.Parse(hexString, NumberStyles.HexNumber), e))
         End Try
      Else
         Try
            Return Convert.ToSByte(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
                                                    UInt64.Parse(hexString, NumberStyles.HexNumber)), e)
         End Try   
      End If
   End Function

   Public Function ToSingle(provider As IFormatProvider) As Single _
                   Implements IConvertible.ToSingle
      If signBit = SignBit.Negative Then
         Return Convert.ToSingle(Int64.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToSingle(UInt64.Parse(hexString, NumberStyles.HexNumber))
      End If   
   End Function

   Public Overloads Function ToString(provider As IFormatProvider) As String _
                   Implements IConvertible.ToString
      Return "0x" & Me.hexString
   End Function
   
   Public Function ToType(conversionType As Type, provider As IFormatProvider) As Object _
                   Implements IConvertible.ToType
      Select Case Type.GetTypeCode(conversionType)
         Case TypeCode.Boolean 
            Return Me.ToBoolean(Nothing)
         Case TypeCode.Byte
            Return Me.ToByte(Nothing)
         Case TypeCode.Char
            Return Me.ToChar(Nothing)
         Case TypeCode.DateTime
            Return Me.ToDateTime(Nothing)
         Case TypeCode.Decimal
            Return Me.ToDecimal(Nothing)
         Case TypeCode.Double
            Return Me.ToDouble(Nothing)
         Case TypeCode.Int16
            Return Me.ToInt16(Nothing)
         Case TypeCode.Int32
            Return Me.ToInt32(Nothing)
         Case TypeCode.Int64
            Return Me.ToInt64(Nothing)
         Case TypeCode.Object
            If GetType(HexString).Equals(conversionType) Then
               Return Me
            Else
               Throw New InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name))
            End If 
         Case TypeCode.SByte
            Return Me.ToSByte(Nothing)
         Case TypeCode.Single
            Return Me.ToSingle(Nothing)
         Case TypeCode.String
            Return Me.ToString(Nothing)
         Case TypeCode.UInt16
            Return Me.ToUInt16(Nothing)
         Case TypeCode.UInt32
            Return Me.ToUInt32(Nothing)
         Case TypeCode.UInt64
            Return Me.ToUInt64(Nothing)   
         Case Else
            Throw New InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name))   
      End Select
   End Function
   
   Public Function ToUInt16(provider As IFormatProvider) As UInt16 _
                   Implements IConvertible.ToUInt16
      If signBit = SignBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt16 type.", _
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Try
            Return Convert.ToUInt16(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt64(hexString, 16)), e)
         End Try            
      End If   
   End Function

   Public Function ToUInt32(provider As IFormatProvider) As UInt32 _
                   Implements IConvertible.ToUInt32
      If signBit = SignBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt32 type.", _
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Try
            Return Convert.ToUInt32(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt32 type.", _
                                                   UInt64.Parse(hexString, NumberStyles.HexNumber)))
         End Try   
      End If   
   End Function
   
   Public Function ToUInt64(provider As IFormatProvider) As UInt64 _
                   Implements IConvertible.ToUInt64
      If signBit = SignBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt64 type.", _
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Return Convert.ToUInt64(hexString, 16)
      End If   
   End Function
End Structure

Nell'esempio seguente viene illustrato che una chiamata al ToUInt64(Object, IFormatProvider) metodo che passa un HexString oggetto come parametro, a sua volta, chiama l'implementazione IConvertible.ToUInt64 della HexString classe.

public class Example
{
   public static void Main()
   {
      ulong positiveValue = UInt64.MaxValue - 100000;
      long negativeValue = -1;

      HexString positiveString = new HexString();
      positiveString.Sign = (SignBit) Math.Sign((decimal)positiveValue);
      positiveString.Value = positiveValue.ToString("X");

      HexString negativeString = new HexString();
      negativeString.Sign = (SignBit) Math.Sign(negativeValue);
      negativeString.Value = negativeValue.ToString("X");

      try {
         Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt64(positiveString));
      }
      catch (OverflowException) {
         Console.WriteLine("{0} is outside the range of the UInt64 type.",
                           Int64.Parse(positiveString.Value, NumberStyles.HexNumber));
      }

      try {
         Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt64(negativeString));
      }
      catch (OverflowException) {
         Console.WriteLine("{0} is outside the range of the UInt64 type.",
                           Int64.Parse(negativeString.Value, NumberStyles.HexNumber));
      }
   }
}
// The example displays the following output:
//       0xFFFFFFFFFFFE795F converts to 18446744073709451615.
//       -1 is outside the range of the UInt64 type.

let positiveValue = UInt64.MaxValue - 100000uL
let negativeValue = -1L

let mutable positiveString = HexString()
positiveString.Sign <- Math.Sign(decimal positiveValue) |> enum
positiveString.Value <- positiveValue.ToString "X"

let mutable negativeString = HexString()
negativeString.Sign <- sign negativeValue |> enum
negativeString.Value <- negativeValue.ToString "X"

try
    printfn $"0x{positiveString.Value} converts to {Convert.ToUInt64 positiveString}."
with :? OverflowException ->
    printfn $"{Int64.Parse(positiveString.Value, NumberStyles.HexNumber)} is outside the range of the UInt64 type."

try
    printfn $"0x{negativeString.Value} converts to {Convert.ToUInt64 negativeString}."
with :? OverflowException ->
    printfn $"{Int64.Parse(negativeString.Value, NumberStyles.HexNumber)} is outside the range of the UInt64 type."
// The example displays the following output:
//       0xFFFFFFFFFFFE795F converts to 18446744073709451615.
//       -1 is outside the range of the UInt64 type.

Module Example
   Public Sub Main()
      Dim positiveValue As UInt64 = CULng(UInt64.MaxValue - 100000)
      Dim negativeValue As Int64 = -1
      
      
      Dim positiveString As New HexString()
      positiveString.Sign = CType(Math.Sign(positiveValue), SignBit)
      positiveString.Value = positiveValue.ToString("X")
      
      Dim negativeString As New HexString()
      negativeString.Sign = CType(Math.Sign(negativeValue), SignBit)
      negativeString.Value = negativeValue.ToString("X")
      
      Try
         Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt64(positiveString))
      Catch e As OverflowException
         Console.WriteLine("{0} is outside the range of the UInt64 type.", _
                           Int64.Parse(positiveString.Value, NumberStyles.HexNumber))
      End Try

      Try
         Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt64(negativeString))
      Catch e As OverflowException
         Console.WriteLine("{0} is outside the range of the UInt64 type.", _
                           Int64.Parse(negativeString.Value, NumberStyles.HexNumber))
      End Try   
   End Sub
End Module
' The example dosplays the following output:
'       0xFFFFFFFFFFFE795F converts to 18446744073709451615.
'       -1 is outside the range of the UInt64 type.

Commenti

Il valore restituito è il risultato di richiamare il IConvertible.ToUInt64 metodo del tipo sottostante di value.

provider consente all'utente di specificare informazioni sulla conversione specifiche delle impostazioni cultura sul contenuto di value. Ad esempio, se value è un oggetto String che rappresenta un numero, provider potrebbe fornire informazioni specifiche delle impostazioni cultura sulla notazione usata per rappresentare tale numero.

I tipi di base ignorano provider; tuttavia, il parametro può essere usato se value è un tipo definito dall'utente che implementa l'interfaccia IConvertible .

ToUInt64(Single)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore del numero a virgola mobile a precisione singola specificato in un intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(float value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (float value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : single -> uint64

Public Shared Function ToUInt64 (value As Single) As ULong

Parametri

value

Single

Numero a virgola mobile a precisione singola da convertire.

Restituisce

UInt64

value, arrotondato all'intero senza segno a 64 bit più vicino. Se value si trova a metà tra due numeri interi, viene restituito il numero intero pari; vale a dire, 4,5 viene convertito in 4, mentre 5,5 viene convertito in 6.

Attributi

CLSCompliantAttribute

Eccezioni

OverflowException

value è minore di zero o maggiore di UInt64.MaxValue.

Esempio

Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di Single valori in un intero lungo senza segno. L'output mostra che i valori frazionari vengono arrotondati prima dell'esecuzione della conversione.

float[] values= { Single.MinValue, -1.38e10f, -1023.299f, -12.98f,
                  0f, 9.113e-16f, 103.919f, 17834.191f, Single.MaxValue };
ulong result;

foreach (float value in values)
{
   try {
      result = Convert.ToUInt64(value);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value, result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt64 type.", value);
   }
}
// The example displays the following output:
//    -3.402823E+38 is outside the range of the UInt64 type.
//    -1.38E+10 is outside the range of the UInt64 type.
//    -1023.299 is outside the range of the UInt64 type.
//    -12.98 is outside the range of the UInt64 type.
//    Converted the Single value 0 to the UInt64 value 0.
//    Converted the Single value 9.113E-16 to the UInt64 value 0.
//    Converted the Single value 103.919 to the UInt64 value 104.
//    Converted the Single value 17834.19 to the UInt64 value 17834.
//    3.402823E+38 is outside the range of the UInt64 type.

let numbers = 
    [| Single.MinValue; -1.38e10f; -1023.299f; -12.98f
       0f; 9.113e-16f; 103.919f; 17834.191f; Single.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt64 type."
// The example displays the following output:
//    -3.402823E+38 is outside the range of the UInt64 type.
//    -1.38E+10 is outside the range of the UInt64 type.
//    -1023.299 is outside the range of the UInt64 type.
//    -12.98 is outside the range of the UInt64 type.
//    Converted the Single value '0' to the UInt64 value 0.
//    Converted the Single value '9.113E-16' to the UInt64 value 0.
//    Converted the Single value '103.919' to the UInt64 value 104.
//    Converted the Single value '17834.19' to the UInt64 value 17834.
//    3.402823E+38 is outside the range of the UInt64 type.

   Dim values() As Single = { Single.MinValue, -1.38e10, -1023.299, -12.98, _
                              0, 9.113e-16, 103.919, 17834.191, Single.MaxValue }
   Dim result As ULong
   
   For Each value As Single In values
      Try
         result = Convert.ToUInt64(value)
         Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                           value.GetType().Name, value, result.GetType().Name, result)
      Catch e As OverflowException
         Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
                           value.GetType().Name, value)
      End Try   
   Next                                 
   ' The example displays the following output:
'    The Single value -3.402823E+38 is outside the range of the UInt64 type.
'    The Single value -1.38E+10 is outside the range of the UInt64 type.
'    The Single value -1023.299 is outside the range of the UInt64 type.
'    The Single value -12.98 is outside the range of the UInt64 type.
'    Converted the Single value 0 to the UInt64 value 0.
'    Converted the Single value 9.113E-16 to the UInt64 value 0.
'    Converted the Single value 103.919 to the UInt64 value 104.
'    Converted the Single value 17834.19 to the UInt64 value 17834.
'    The Single value 3.402823E+38 is outside the range of the UInt64 type.

Vedi anche

• Single
• Round

ToUInt64(String, Int32)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte la rappresentazione di stringa di un numero in una base specificata nell'intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(System::String ^ value, int fromBase);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string? value, int fromBase);

[<System.CLSCompliant(false)>]
static member ToUInt64 : string * int -> uint64

Public Shared Function ToUInt64 (value As String, fromBase As Integer) As ULong

Parametri

value

String

Stringa che contiene il numero da convertire.

fromBase

Int32

Base del numero in value, che deve essere 2, 8, 10 o 16.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente al numero in value oppure 0 (zero) se value è null.

Attributi

CLSCompliantAttribute

Eccezioni

ArgumentException

Il valore di fromBase non è 2, 8, 10 o 16.

-oppure-

value, che rappresenta un numero senza segno non in base 10, è preceduto da un segno negativo.

ArgumentOutOfRangeException

value è Empty.

FormatException

value contiene un carattere che corrisponde a una cifra non valida nella base specificata da fromBase. Il messaggio di eccezione indica che non ci sono cifre da convertire se il primo carattere in value non è valido; in caso contrario, il messaggio indica che value contiene caratteri finali non validi.

OverflowException

value, che rappresenta un numero senza segno non in base 10, è preceduto da un segno negativo.

-oppure-

value rappresenta un numero minore di UInt64.MinValue o maggiore di UInt64.MaxValue.

Esempio

L'esempio seguente tenta di interpretare ogni elemento in una matrice di stringhe numeriche come valore esadecimale e per convertirlo in un intero lungo senza segno.

using System;

public class Example
{
   public static void Main()
   {
      string[] hexStrings = { "8000000000000000", "0FFFFFFFFFFFFFFF",
                              "F000000000000000", "00A3000000000000",
                              "D", "-13", "9AC61", "GAD",
                              "FFFFFFFFFFFFFFFFF" };

      foreach (string hexString in hexStrings)
      {
         Console.Write("{0,-18}  -->  ", hexString);
         try {
            ulong number = Convert.ToUInt64(hexString, 16);
            Console.WriteLine("{0,26:N0}", number);
         }
         catch (FormatException) {
            Console.WriteLine("{0,26}", "Bad Format");
         }
         catch (OverflowException) {
            Console.WriteLine("{0,26}", "Numeric Overflow");
         }
         catch (ArgumentException) {
            Console.WriteLine("{0,26}", "Invalid in Base 16");
         }
      }
   }
}
// The example displays the following output:
//    8000000000000000    -->   9,223,372,036,854,775,808
//    0FFFFFFFFFFFFFFF    -->   1,152,921,504,606,846,975
//    F000000000000000    -->  17,293,822,569,102,704,640
//    00A3000000000000    -->      45,880,421,203,836,928
//    D                   -->                          13
//    -13                 -->          Invalid in Base 16
//    9AC61               -->                     633,953
//    GAD                 -->                  Bad Format
//    FFFFFFFFFFFFFFFFF   -->            Numeric Overflow

open System

let hexStrings =
    [| "8000000000000000"; "0FFFFFFFFFFFFFFF"
       "F000000000000000"; "00A3000000000000"
       "D"; "-13"; "9AC61"; "GAD"
       "FFFFFFFFFFFFFFFFF" |]

for hexString in hexStrings do
    printf $"{hexString,-18}  -->  "
    try
        let number = Convert.ToUInt64(hexString, 16)
        printfn $"{number,26:N0}"
    with
    | :? FormatException ->
        printfn "%26s" "Bad Format"
    | :? OverflowException ->
        printfn "%26s" "Numeric Overflow"
    | :? ArgumentException ->
        printfn "%26s" "Invalid in Base 16"
// The example displays the following output:
//    8000000000000000    -->   9,223,372,036,854,775,808
//    0FFFFFFFFFFFFFFF    -->   1,152,921,504,606,846,975
//    F000000000000000    -->  17,293,822,569,102,704,640
//    00A3000000000000    -->      45,880,421,203,836,928
//    D                   -->                          13
//    -13                 -->          Invalid in Base 16
//    9AC61               -->                     633,953
//    GAD                 -->                  Bad Format
//    FFFFFFFFFFFFFFFFF   -->            Numeric Overflow

Module Example
   Public Sub Main()
      Dim hexStrings() As String = { "8000000000000000", "0FFFFFFFFFFFFFFF", _
                                     "F000000000000000", "00A3000000000000", _
                                     "D", "-13", "9AC61", "GAD", _
                                     "FFFFFFFFFFFFFFFFF" }
      For Each hexString As String In hexStrings
         Console.Write("{0,-18}  -->  ", hexString)
         Try
            Dim number As ULong = Convert.ToUInt64(hexString, 16)
            Console.WriteLine("{0,26:N0}", number)
         Catch e As FormatException
            Console.WriteLine("{0,26}", "Bad Format")
         Catch e As OverflowException
            Console.WriteLine("{0,26}", "Numeric Overflow")
         Catch e As ArgumentException
            Console.WriteLine("{0,26}", "Invalid in Base 16")
         End Try
      Next                                            
   End Sub
End Module
' The example displays the following output:
'    8000000000000000    -->   9,223,372,036,854,775,808
'    0FFFFFFFFFFFFFFF    -->   1,152,921,504,606,846,975
'    F000000000000000    -->  17,293,822,569,102,704,640
'    00A3000000000000    -->      45,880,421,203,836,928
'    D                   -->                          13
'    -13                 -->          Invalid in Base 16
'    9AC61               -->                     633,953
'    GAD                 -->                  Bad Format
'    FFFFFFFFFFFFFFFFF   -->            Numeric Overflow

Commenti

Se fromBase è 16, è possibile prefisso il numero specificato dal value parametro con "0x" o "0X".

Poiché il tipo di dati supporta solo valori senza segno, il UInt64ToUInt64(String, Int32) metodo presuppone che value sia espresso usando la rappresentazione binaria senza segno. In altre parole, tutti i 64 bit vengono usati per rappresentare il valore numerico e un bit di segno è assente. Di conseguenza, è possibile scrivere codice in cui un valore intero lungo firmato non compreso nell'intervallo del UInt64 tipo di dati viene convertito in un UInt64 valore senza che il metodo generi un'eccezione. Nell'esempio seguente viene eseguita la conversione MinValue nella rappresentazione stringa esadecimale e quindi viene chiamato il ToUInt64(String, Int32) metodo . Anziché generare un'eccezione, il metodo visualizza il messaggio "0x8000000000000000 converte in 9223372036854775808".

// Create a hexadecimal value out of range of the UInt64 type.
string value = Convert.ToString(Int64.MinValue, 16);
// Convert it back to a number.
try
{
   UInt64 number = Convert.ToUInt64(value, 16);
   Console.WriteLine("0x{0} converts to {1}.", value, number);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned long integer.",
                     value);
}

// Create a hexadecimal value out of range of the UInt64 type.
let value = Convert.ToString(Int64.MinValue, 16)
// Convert it back to a number.
try
    let number = Convert.ToUInt64(value, 16)
    printfn $"0x{value} converts to {number}."
with :? OverflowException ->
    printfn $"Unable to convert '0x{value}' to an unsigned long integer."

' Create a hexadecimal value out of range of the UInt64 type.
Dim value As String = Convert.ToString(Long.MinValue, 16)
' Convert it back to a number.
Try
   Dim number As UInt64 = Convert.ToUInt64(value, 16)
   Console.WriteLine("0x{0} converts to {1}.", value, number)
Catch e As OverflowException
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned long integer.", _
                     value)
End Try

Quando si eseguono operazioni binarie o conversioni numeriche, è sempre responsabilità dello sviluppatore verificare che un metodo o un operatore usi la rappresentazione numerica appropriata per interpretare un determinato valore. Nell'esempio seguente viene illustrata una tecnica per garantire che il metodo non usi in modo inappropriato la rappresentazione binaria per interpretare un valore che usa la rappresentazione di complemento di due durante la conversione di una stringa esadecimale in un UInt64 valore. L'esempio determina se un valore rappresenta un intero firmato o senza segno durante la conversione di tale valore nella relativa rappresentazione stringa. Quando l'esempio converte il valore in un UInt64 valore, verifica se il valore originale era un intero firmato. In tal caso, e se il bit ad ordine elevato è impostato (che indica che il valore originale è negativo), il metodo genera un'eccezione.

// Create a negative hexadecimal value out of range of the UInt64 type.
long sourceNumber = Int64.MinValue;
bool isSigned = Math.Sign((long)sourceNumber.GetType().GetField("MinValue").GetValue(null)) == -1;
string value = Convert.ToString(sourceNumber, 16);
UInt64 targetNumber;
try
{
   targetNumber = Convert.ToUInt64(value, 16);
   if (isSigned && ((targetNumber & 0x8000000000000000) != 0))
      throw new OverflowException();
   else
      Console.WriteLine("0x{0} converts to {1}.", value, targetNumber);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned long integer.",
                     value);
}
// Displays the following to the console:
//    Unable to convert '0x8000000000000000' to an unsigned long integer.

// Create a negative hexadecimal value out of range of the UInt64 type.
let sourceNumber = Int64.MinValue
let isSigned = sign (sourceNumber.GetType().GetField("MinValue").GetValue null :?> int64) = -1
let value = Convert.ToString(sourceNumber, 16)
try
    let targetNumber = Convert.ToUInt64(value, 16)
    if isSigned && targetNumber &&& 0x8000000000000000uL <> 0uL then  
        raise (OverflowException())
    else
        printfn $"0x{value} converts to {targetNumber}."
with :? OverflowException ->
    printfn $"Unable to convert '0x{value}' to an unsigned long integer."
// Displays the following to the console:
//    Unable to convert '0x8000000000000000' to an unsigned long integer.

' Create a negative hexadecimal value out of range of the UInt64 type.
Dim sourceNumber As Long = Long.MinValue
Dim isSigned As Boolean = Math.Sign(sourceNumber.MinValue) = -1
Dim value As String = Convert.ToString(sourceNumber, 16)
Dim targetNumber As UInt64
Try
   targetNumber = Convert.ToUInt64(value, 16)
   If isSigned And ((targetNumber And &H8000000000000000ul) <> 0) Then
      Throw New OverflowException()
   Else 
      Console.WriteLine("0x{0} converts to {1}.", value, targetNumber)
   End If    
Catch e As OverflowException
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned long integer.", _
                     value)
End Try 
' Displays the following to the console:
'    Unable to convert '0x8000' to an unsigned long integer.

ToUInt64(UInt64)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Restituisce l'intero senza segno a 64 bit specificato; non viene eseguita alcuna conversione effettiva.

public:
 static System::UInt64 ToUInt64(System::UInt64 value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (ulong value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : uint64 -> uint64

Public Shared Function ToUInt64 (value As ULong) As ULong

Parametri

value

UInt64

Intero senza segno a 64 bit da restituire.

Restituisce

UInt64

value viene restituito invariato.

Attributi

CLSCompliantAttribute

ToUInt64(SByte)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore dell'intero con segno a 8 bit specificato nell'intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(System::SByte value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (sbyte value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : sbyte -> uint64

Public Shared Function ToUInt64 (value As SByte) As ULong

Parametri

value

SByte

Intero con segno a 8 bit da convertire.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value.

Attributi

CLSCompliantAttribute

Eccezioni

OverflowException

value è minore di zero.

Esempio

Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di byte firmata in un intero lungo senza segno.

sbyte[] numbers = { SByte.MinValue, -1, 0, 10, SByte.MaxValue };
ulong result;

foreach (sbyte number in numbers)
{
   try {
      result = Convert.ToUInt64(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The SByte value -128 is outside the range of the UInt64 type.
//    The SByte value -1 is outside the range of the UInt64 type.
//    Converted the SByte value 0 to the UInt64 value 0.
//    Converted the SByte value 10 to the UInt64 value 10.
//    Converted the SByte value 127 to the UInt64 value 127.

let numbers = [| SByte.MinValue; -1y; 0y; 10y; SByte.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt64 type."
// The example displays the following output:
//    -128 is outside the range of the UInt64 type.
//    -1 is outside the range of the UInt64 type.
//    Converted the SByte value '0' to the UInt64 value 0.
//    Converted the SByte value '10' to the UInt64 value 10.
//    Converted the SByte value '127' to the UInt64 value 127.

Dim numbers() As SByte = { SByte.MinValue, -1, 0, 10, SByte.MaxValue }
Dim result As ULong

For Each number As SByte In numbers
   Try
      result = Convert.ToUInt64(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The SByte value -128 is outside the range of the UInt64 type.
'    The SByte value -1 is outside the range of the UInt64 type.
'    Converted the SByte value 0 to the UInt64 value 0.
'    Converted the SByte value 10 to the UInt64 value 10.
'    Converted the SByte value 127 to the UInt64 value 127.

ToUInt64(Int16)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore dell'intero con segno a 16 bit specificato nell'intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(short value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (short value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : int16 -> uint64

Public Shared Function ToUInt64 (value As Short) As ULong

Parametri

value

Int16

Intero con segno a 16 bit da convertire.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value.

Attributi

CLSCompliantAttribute

Eccezioni

OverflowException

value è minore di zero.

Esempio

Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di interi a 16 bit in un intero lungo senza segno.

short[] numbers= { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue };
ulong result;

foreach (short number in numbers)
{
   try {
      result = Convert.ToUInt64(number);
      Console.WriteLine("Converted the {0} value {1} to a {2} value {3}.",
                           number.GetType().Name, number,
                           result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt64 type.", number);
   }
}
// The example displays the following output:
//    -32768 is outside the range of the UInt64 type.
//    -1 is outside the range of the UInt64 type.
//    Converted the Int16 value 0 to a UInt64 value 0.
//    Converted the Int16 value 121 to a UInt64 value 121.
//    Converted the Int16 value 340 to a UInt64 value 340.
//    Converted the Int16 value 32767 to a UInt64 value 32767.

let numbers = [| Int16.MinValue; -132s; 0s; 121s; 16103s; Int16.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
// The example displays the following output:
//    The Int16 value -32768 is outside the range of the UInt64 type.
//    The Int16 value -132 is outside the range of the UInt64 type.
//    Converted the Int16 value '0' to the UInt64 value 0.
//    Converted the Int16 value '121' to the UInt64 value 121.
//    Converted the Int16 value '16103' to the UInt64 value 16103.
//    Converted the Int16 value '32767' to the UInt64 value 32767.

Dim numbers() As Short = { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue }
Dim result As ULong

For Each number As Short In numbers
   Try
      result = Convert.ToUInt64(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                           number.GetType().Name, number, _
                           result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
                        number.GetType().Name, number)
   End Try   
Next
' The example displays the following output:
'    The Int16 value -32768 is outside the range of the UInt64 type.
'    The Int16 value -1 is outside the range of the UInt64 type.
'    Converted the Int16 value 0 to the UInt64 value 0.
'    Converted the Int16 value 121 to the UInt64 value 121.
'    Converted the Int16 value 340 to the UInt64 value 340.
'    Converted the Int16 value 32767 to the UInt64 value 32767.

ToUInt64(Int64)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore dell'intero con segno a 64 bit specificato in un intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(long value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (long value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : int64 -> uint64

Public Shared Function ToUInt64 (value As Long) As ULong

Parametri

value

Int64

Intero con segno a 64 bit da convertire.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value.

Attributi

CLSCompliantAttribute

Eccezioni

OverflowException

value è minore di zero.

Esempio

Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di interi lunghi in un intero lungo senza segno.

long[] numbers = { Int64.MinValue, -19432, -18, 0, 121, 340, Int64.MaxValue };
ulong result;
foreach (long number in numbers)
{
   try {
      result = Convert.ToUInt64(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int64 value -9223372036854775808 is outside the range of the UInt64 type.
//    The Int64 value -19432 is outside the range of the UInt64 type.
//    The Int64 value -18 is outside the range of the UInt64 type.
//    Converted the Int64 value 0 to the UInt64 value 0.
//    Converted the Int64 value 121 to the UInt64 value 121.
//    Converted the Int64 value 340 to the UInt64 value 340.
//    Converted the Int64 value 9223372036854775807 to a UInt64 value 9223372036854775807.

let numbers = [| Int64.MinValue; -1; 0; 121; 340; Int64.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn "The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
// The example displays the following output:
//    The Int64 value -9223372036854775808 is outside the range of the UInt64 type.
//    The Int64 value -1 is outside the range of the UInt64 type.
//    Converted the Int64 value '0' to the UInt64 value 0.
//    Converted the Int64 value '121' to the UInt64 value 121.
//    Converted the Int64 value '340' to the UInt64 value 340.
//    The Int64 value 9223372036854775807 is outside the range of the UInt64 type.

Dim numbers() As Long = { Int64.MinValue, -19432, -18, 0, 121, 340, Int64.MaxValue }
Dim result As ULong

For Each number As Long In numbers
   Try
      result = Convert.ToUInt64(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The Int64 value -9223372036854775808 is outside the range of the UInt64 type.
'    The Int64 value -19432 is outside the range of the UInt64 type.
'    The Int64 value -18 is outside the range of the UInt64 type.
'    Converted the Int64 value 0 to the UInt64 value 0.
'    Converted the Int64 value 121 to the UInt64 value 121.
'    Converted the Int64 value 340 to the UInt64 value 340.
'    Converted the Int64 value 9223372036854775807 to the UInt64 value 9223372036854775807.

ToUInt64(Int32)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore dell'intero con segno a 32 bit specificato in un intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(int value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (int value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : int -> uint64

Public Shared Function ToUInt64 (value As Integer) As ULong

Parametri

value

Int32

Intero con segno a 32 bit da convertire.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value.

Attributi

CLSCompliantAttribute

Eccezioni

OverflowException

value è minore di zero.

Esempio

Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di interi in un intero lungo senza segno.

int[] numbers = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue };
ulong result;

foreach (int number in numbers)
{
   try {
      result = Convert.ToUInt64(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int32 value -2147483648 is outside the range of the UInt64 type.
//    The Int32 value -1 is outside the range of the UInt64 type.
//    Converted the Int32 value 0 to the UInt64 value 0.
//    Converted the Int32 value 121 to the UInt64 value 121.
//    Converted the Int32 value 340 to the UInt64 value 340.
//    Converted the Int32 value 2147483647 to the UInt64 value 2147483647.

let numbers = [| Int32.MinValue; -1; 0; 121; 340; Int32.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn "The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
                        
// The example displays the following output:
//    The Int32 value -2147483648 is outside the range of the UInt64 type.
//    The Int32 value -1 is outside the range of the UInt64 type.
//    Converted the Int32 value '0' to the UInt64 value 0.
//    Converted the Int32 value '121' to the UInt64 value 121.
//    Converted the Int32 value '340' to the UInt64 value 340.
//    The Int32 value 2147483647 is outside the range of the UInt64 type.

Dim numbers() As Integer = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue }
Dim result As ULong

For Each number As Integer In numbers
   Try
      result = Convert.ToUInt64(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
                        number.GetType().Name, number)
   End Try   
Next
' The example displays the following output:
'    The Int32 value -2147483648 is outside the range of the UInt64 type.
'    The Int32 value -1 is outside the range of the UInt64 type.
'    Converted the Int32 value 0 to the UInt64 value 0.
'    Converted the Int32 value 121 to the UInt64 value 121.
'    Converted the Int32 value 340 to the UInt64 value 340.
'    Converted the Int32 value 2147483647 to the UInt64 value 2147483647.

ToUInt64(Double)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore del numero a virgola mobile e con precisione doppia specificato in un intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(double value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (double value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : double -> uint64

Public Shared Function ToUInt64 (value As Double) As ULong

Parametri

value

Double

Numero a virgola mobile a precisione doppia da convertire.

Restituisce

UInt64

value, arrotondato all'intero senza segno a 64 bit più vicino. Se value si trova a metà tra due numeri interi, viene restituito il numero intero pari; vale a dire, 4,5 viene convertito in 4, mentre 5,5 viene convertito in 6.

Attributi

CLSCompliantAttribute

Eccezioni

OverflowException

value è minore di zero o maggiore di UInt64.MaxValue.

Esempio

Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di Double valori in un intero lungo senza segno.

double[] values= { Double.MinValue, -1.38e10, -1023.299, -12.98,
                   0, 9.113e-16, 103.919, 17834.191, Double.MaxValue };
ulong result;

foreach (double value in values)
{
   try {
      result = Convert.ToUInt64(value);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt64 type.", value);
   }
}
// The example displays the following output:
//    -1.79769313486232E+308 is outside the range of the UInt64 type.
//    -13800000000 is outside the range of the UInt64 type.
//    -1023.299 is outside the range of the UInt64 type.
//    -12.98 is outside the range of the UInt64 type.
//    Converted the Double value '0' to the UInt64 value 0.
//    Converted the Double value '9.113E-16' to the UInt64 value 0.
//    Converted the Double value '103.919' to the UInt64 value 104.
//    Converted the Double value '17834.191' to the UInt64 value 17834.
//    1.79769313486232E+308 is outside the range of the UInt64 type.

let numbers = 
    [| Double.MinValue; -1.38e10; -1023.299; -12.98
       0; 9.113e-16; 103.919; 17834.191; Double.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt64 type."
// The example displays the following output:
//    -1.79769313486232E+308 is outside the range of the UInt64 type.
//    -13800000000 is outside the range of the UInt64 type.
//    -1023.299 is outside the range of the UInt64 type.
//    -12.98 is outside the range of the UInt64 type.
//    Converted the Double value '0' to the UInt64 value 0.
//    Converted the Double value '9.113E-16' to the UInt64 value 0.
//    Converted the Double value '103.919' to the UInt64 value 104.
//    Converted the Double value '17834.191' to the UInt64 value 17834.
//    1.79769313486232E+308 is outside the range of the UInt64 type.

Dim values() As Double = { Double.MinValue, -1.38e10, -1023.299, -12.98, _
                           0, 9.113e-16, 103.919, 17834.191, Double.MaxValue }
Dim result As ULong

For Each value As Double In values
   Try
      result = Convert.ToUInt64(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
                        value.GetType().Name, value)
   End Try   
Next                                 
' The example displays the following output:
'    The Double value -1.79769313486232E+308 is outside the range of the UInt64 type.
'    The Double value -13800000000 is outside the range of the UInt64 type.
'    The Double value -1023.299 is outside the range of the UInt64 type.
'    The Double value -12.98 is outside the range of the UInt64 type.
'    Converted the Double value '0' to the UInt64 value 0.
'    Converted the Double value '9.113E-16' to the UInt64 value 0.
'    Converted the Double value '103.919' to the UInt64 value 104.
'    Converted the Double value '17834.191' to the UInt64 value 17834.
'    The Double value 1.79769313486232E+308 is outside the range of the UInt64 type.

Vedi anche

• Double
• Round

ToUInt64(Decimal)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore del numero decimale specificato in un intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(System::Decimal value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (decimal value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : decimal -> uint64

Public Shared Function ToUInt64 (value As Decimal) As ULong

Parametri

value

Decimal

Numero decimale da convertire.

Restituisce

UInt64

value, arrotondato all'intero senza segno a 64 bit più vicino. Se value si trova a metà tra due numeri interi, viene restituito il numero intero pari; vale a dire, 4,5 viene convertito in 4, mentre 5,5 viene convertito in 6.

Attributi

CLSCompliantAttribute

Eccezioni

OverflowException

value è minore di zero o maggiore di UInt64.MaxValue.

Esempio

Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di Decimal valori in un intero lungo senza segno.

decimal[] values= { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
                    199.55m, 9214.16m, Decimal.MaxValue };
ulong result;

foreach (decimal value in values)
{
   try {
      result = Convert.ToUInt64(value);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt64 type.",
                        value);
   }
}
// The example displays the following output:
//    -79228162514264337593543950335 is outside the range of the UInt64 type.
//    -1034.23 is outside the range of the UInt64 type.
//    -12 is outside the range of the UInt64 type.
//    Converted the Decimal value '0' to the UInt64 value 0.
//    Converted the Decimal value '147' to the UInt64 value 147.
//    Converted the Decimal value '199.55' to the UInt64 value 200.
//    Converted the Decimal value '9214.16' to the UInt64 value 9214.
//    79228162514264337593543950335 is outside the range of the UInt64 type.

let numbers = 
    [| Decimal.MinValue; -1034.23m; -12m; 0m; 147m; 9214.16m; Decimal.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt64 type."
// The example displays the following output:
//    -79228162514264337593543950335 is outside the range of the UInt64 type.
//    -1034.23 is outside the range of the UInt64 type.
//    -12 is outside the range of the UInt64 type.
//    Converted the Decimal value '0' to the UInt64 value 0.
//    Converted the Decimal value '147' to the UInt64 value 147.
//    Converted the Decimal value '9214.16' to the UInt64 value 9214.
//    79228162514264337593543950335 is outside the range of the UInt64 type.

Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _
                            199.55d, 9214.16d, Decimal.MaxValue }
Dim result As ULong

For Each value As Decimal In values
   Try
      result = Convert.ToUInt64(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
                        value.GetType().Name, value)
   End Try   
Next                                  
' The example displays the following output:
'    The Decimal value -79228162514264337593543950335 is outside the range of the UInt64 type.
'    The Decimal value -1034.23 is outside the range of the UInt64 type.
'    The Decimal value -12 is outside the range of the UInt64 type.
'    Converted the Decimal value '0' to the UInt64 value 0.
'    Converted the Decimal value '147' to the UInt64 value 147.
'    Converted the Decimal value '199.55' to the UInt64 value 200.
'    Converted the Decimal value '9214.16' to the UInt64 value 9214.
'    The Decimal value 79228162514264337593543950335 is outside the range of the UInt64 type.

Vedi anche

• Round

ToUInt64(DateTime)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

La chiamata di questo metodo genera sempre un'eccezione InvalidCastException.

public:
 static System::UInt64 ToUInt64(DateTime value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (DateTime value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : DateTime -> uint64

Public Shared Function ToUInt64 (value As DateTime) As ULong

Parametri

value

DateTime

Valore di data e ora da convertire.

Restituisce

UInt64

Questa conversione non è supportata. Non vengono restituiti valori.

Attributi

CLSCompliantAttribute

Eccezioni

InvalidCastException

Questa conversione non è supportata.

ToUInt64(Char)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore del carattere Unicode specificato nell'intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(char value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (char value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : char -> uint64

Public Shared Function ToUInt64 (value As Char) As ULong

Parametri

value

Char

Carattere Unicode da convertire.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value.

Attributi

CLSCompliantAttribute

Esempio

Nell'esempio seguente ogni elemento viene convertito in una matrice di caratteri in un intero lungo senza segno.

char[] chars = { 'a', 'z', '\u0007', '\u03FF',
                 '\u7FFF', '\uFFFE' };
ulong result;

foreach (char ch in chars)
{
   result = Convert.ToUInt64(ch);
   Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                     ch.GetType().Name, ch,
                     result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Char value 'a' to the UInt64 value 97.
//    Converted the Char value 'z' to the UInt64 value 122.
//    Converted the Char value '' to the UInt64 value 7.
//    Converted the Char value '?' to the UInt64 value 1023.
//    Converted the Char value '?' to the UInt64 value 32767.
//    Converted the Char value '?' to the UInt64 value 65534.

let chars = 
    [| 'a'; 'z'; '\u0007'; '\u03FF'; '\u7FFF'; '\uFFFE' |]

for ch in chars do
    try
        let result = Convert.ToUInt16 ch
        printfn $"Converted the {ch.GetType().Name} value '{ch}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"Unable to convert u+{int ch:X4} to a UInt16."
// The example displays the following output:
//    Converted the Char value 'a' to the UInt64 value 97.
//    Converted the Char value 'z' to the UInt64 value 122.
//    Converted the Char value '' to the UInt64 value 7.
//    Converted the Char value '?' to the UInt64 value 1023.
//    Converted the Char value '?' to the UInt64 value 32767.
//    Converted the Char value '?' to the UInt64 value 65534.

Dim chars() As Char = { "a"c, "z"c, ChrW(7), ChrW(1023), _
                        ChrW(Short.MaxValue), ChrW(&hFFFE) }
Dim result As ULong
                        
For Each ch As Char in chars
   result = Convert.ToUInt64(ch)
   Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                     ch.GetType().Name, ch, _
                     result.GetType().Name, result)
Next   
' The example displays the following output:
'    Converted the Char value 'a' to the UInt64 value 97.
'    Converted the Char value 'z' to the UInt64 value 122.
'    Converted the Char value '' to the UInt64 value 7.
'    Converted the Char value '?' to the UInt64 value 1023.
'    Converted the Char value '?' to the UInt64 value 32767.
'    Converted the Char value '?' to the UInt64 value 65534.

ToUInt64(Byte)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore dell'intero senza segno a 8 bit specificato nell'intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(System::Byte value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (byte value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : byte -> uint64

Public Shared Function ToUInt64 (value As Byte) As ULong

Parametri

value

Byte

Intero senza segno a 8 bit da convertire.

Restituisce

UInt64

Intero con segno a 64 bit equivalente a value.

Attributi

CLSCompliantAttribute

Esempio

Nell'esempio seguente ogni elemento viene convertito in una matrice di byte in un intero lungo senza segno.

byte[] bytes = { Byte.MinValue, 14, 122, Byte.MaxValue};
ulong result;

foreach (byte byteValue in bytes)
{
   result = Convert.ToUInt64(byteValue);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                     byteValue.GetType().Name, byteValue,
                     result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Byte value 0 to the UInt64 value 0.
//    Converted the Byte value 14 to the UInt64 value 14.
//    Converted the Byte value 122 to the UInt64 value 122.
//    Converted the Byte value 255 to the UInt64 value 255.

let bytes = [| Byte.MinValue; 14uy; 122uy; Byte.MaxValue |]

for byteValue in bytes do
    let result = Convert.ToUInt16 byteValue
    printfn $"Converted the {byteValue.GetType().Name} value '{byteValue}' to the {result.GetType().Name} value {result}."
// The example displays the following output:
//       Converted the Byte value '0' to the UInt64 value 0.
//       Converted the Byte value '14' to the UInt64 value 14.
//       Converted the Byte value '122' to the UInt64 value 122.
//       Converted the Byte value '255' to the UInt64 value 255.

Dim bytes() As Byte = { Byte.MinValue, 14, 122, Byte.MaxValue}
Dim result As ULong

For Each byteValue As Byte In bytes
   result = Convert.ToUInt64(byteValue)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                     byteValue.GetType().Name, byteValue, _
                     result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the Byte value 0 to the UInt64 value 0.
'    Converted the Byte value 14 to the UInt64 value 14.
'    Converted the Byte value 122 to the UInt64 value 122.
'    Converted the Byte value 255 to the UInt64 value 255.

ToUInt64(Boolean)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore booleano specificato nell'intero senza segno a 64 bit equivalente.

public:
 static System::UInt64 ToUInt64(bool value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (bool value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : bool -> uint64

Public Shared Function ToUInt64 (value As Boolean) As ULong

Parametri

value

Boolean

Valore booleano da convertire.

Restituisce

UInt64

Il numero 1 se value è true; in caso contrario, 0.

Attributi

CLSCompliantAttribute

Esempio

Nell'esempio seguente vengono convertiti valori booleani true e false valori in interi lunghi senza segno.

bool falseFlag = false;
bool trueFlag = true;

Console.WriteLine("{0} converts to {1}.", falseFlag,
                  Convert.ToUInt64(falseFlag));
Console.WriteLine("{0} converts to {1}.", trueFlag,
                  Convert.ToUInt64(trueFlag));
// The example displays the following output:
//       False converts to 0.
//       True converts to 1.

let falseFlag = false
let trueFlag = true

printfn $"{falseFlag} converts to {Convert.ToInt32 falseFlag}."
printfn $"{trueFlag} converts to {Convert.ToInt32 trueFlag}."
// The example displays the following output:
//       False converts to 0.
//       True converts to 1.

Dim falseFlag As Boolean = False
Dim trueFlag As Boolean = True

Console.WriteLine("{0} converts to {1}.", falseFlag, _
                  Convert.ToUInt64(falseFlag))
Console.WriteLine("{0} converts to {1}.", trueFlag, _
                  Convert.ToUInt64(trueFlag))
' The example displays the following output:
'       False converts to 0.
'       True converts to 1.

ToUInt64(Object)

Origine:

Convert.cs

Importante

Questa API non è conforme a CLS.

Converte il valore dell'oggetto specificato in un intero senza segno a 64 bit.

public:
 static System::UInt64 ToUInt64(System::Object ^ value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (object? value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : obj -> uint64

Public Shared Function ToUInt64 (value As Object) As ULong

Parametri

value

Object

Oggetto che implementa l'interfaccia IConvertible oppure null.

Restituisce

UInt64

Intero senza segno a 64 bit equivalente a value oppure zero se value è null.

Attributi

CLSCompliantAttribute

Eccezioni

FormatException

Il formato di value non è appropriato.

InvalidCastException

value non implementa l'interfaccia IConvertible.

-oppure-

La conversione non è supportata.

OverflowException

value rappresenta un numero minore di UInt64.MinValue o maggiore di UInt64.MaxValue.

Esempio

Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di oggetti in un intero lungo senza segno.

object[] values = { true, -12, 163, 935, 'x', new DateTime(2009, 5, 12),
                    "104", "103.0", "-1",
                    "1.00e2", "One", 1.00e2, 16.3e42};
ulong result;

foreach (object value in values)
{
   try {
      result = Convert.ToUInt64(value);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.",
                        value.GetType().Name, value);
   }
   catch (FormatException) {
      Console.WriteLine("The {0} value {1} is not in a recognizable format.",
                        value.GetType().Name, value);
   }
   catch (InvalidCastException) {
      Console.WriteLine("No conversion to a UInt64 exists for the {0} value {1}.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    Converted the Boolean value True to the UInt64 value 1.
//    The Int32 value -12 is outside the range of the UInt64 type.
//    Converted the Int32 value 163 to the UInt64 value 163.
//    Converted the Int32 value 935 to the UInt64 value 935.
//    Converted the Char value x to the UInt64 value 120.
//    No conversion to a UInt64 exists for the DateTime value 5/12/2009 12:00:00 AM.
//    Converted the String value 104 to the UInt64 value 104.
//    The String value 103.0 is not in a recognizable format.
//    The String value -1 is outside the range of the UInt64 type.
//    The String value 1.00e2 is not in a recognizable format.
//    The String value One is not in a recognizable format.
//    Converted the Double value 100 to the UInt64 value 100.
//    The Double value 1.63E+43 is outside the range of the UInt64 type.

let values: obj[] =
    [| true; -12; 163; 935; 'x'; DateTime(2009, 5, 12)
       "104"; "103.0"; "-1"; "1.00e2"; "One"; 1.00e2 |]

for value in values do
    try
        let result = Convert.ToUInt16 value
        printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
    with 
    | :? OverflowException ->
        printfn $"The {value.GetType().Name} value {value} is outside the range of the UInt64 type."
    | :? FormatException ->
        printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
    | :? InvalidCastException ->
        printfn $"No conversion to a UInt16 exists for the {value.GetType().Name} value {value}."
// The example displays the following output:
//    Converted the Boolean value 'True' to the UInt64 value 1.
//    The Int32 value -12 is outside the range of the UInt64 type.
//    Converted the Int32 value '163' to the UInt64 value 163.
//    Converted the Int32 value '935' to the UInt64 value 935.
//    Converted the Char value 'x' to the UInt64 value 120.
//    No conversion to a UInt16 exists for the DateTime value 5/12/2009 12:00:00 AM.
//    Converted the String value '104' to the UInt64 value 104.
//    The String value 103.0 is not in a recognizable format.
//    The String value -1 is outside the range of the UInt64 type.
//    The String value 1.00e2 is not in a recognizable format.
//    The String value One is not in a recognizable format.
//    Converted the Double value '100' to the UInt64 value 100.

Dim values() As Object = { True, -12, 163, 935, "x"c, #5/12/2009#, _
                           "104", "103.0", "-1", _
                           "1.00e2", "One", 1.00e2, 16.3e42}
Dim result As ULong

For Each value As Object In values
   Try
      result = Convert.ToUInt64(value)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt64 type.", _
                        value.GetType().Name, value)
   Catch e As FormatException
      Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
                        value.GetType().Name, value)
   Catch e As InvalidCastException
      Console.WriteLine("No conversion to a UInt64 exists for the {0} value {1}.", _
                        value.GetType().Name, value)
                        
   End Try
Next                           
' The example displays the following output:
'    Converted the Boolean value True to the UInt64 value 1.
'    The Int32 value -12 is outside the range of the UInt64 type.
'    Converted the Int32 value 163 to the UInt64 value 163.
'    Converted the Int32 value 935 to the UInt64 value 935.
'    Converted the Char value x to the UInt64 value 120.
'    No conversion to a UInt64 exists for the DateTime value 5/12/2009 12:00:00 AM.
'    Converted the String value 104 to the UInt64 value 104.
'    The String value 103.0 is not in a recognizable format.
'    The String value -1 is outside the range of the UInt64 type.
'    The String value 1.00e2 is not in a recognizable format.
'    The String value One is not in a recognizable format.
'    Converted the Double value 100 to the UInt64 value 100.
'    The Double value 1.63E+43 is outside the range of the UInt64 type.

Commenti

Il valore restituito è il risultato di richiamare il IConvertible.ToUInt64 metodo del tipo sottostante di value.