Convert.ToUInt16 Metodo
Definizione
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
Converte un valore specificato in un intero senza segno a 16 bit.
Overload
| ToUInt16(String) |
Converte la rappresentazione di stringa specificata di un numero in un intero senza segno a 16 bit equivalente. |
| ToUInt16(UInt16) |
Restituisce l'intero senza segno a 16 bit specificato; non viene eseguita alcuna conversione effettiva. |
| ToUInt16(UInt32) |
Converte il valore dell'intero senza segno a 32 bit specificato in un intero senza segno a 16 bit equivalente. |
| ToUInt16(String, Int32) |
Converte la rappresentazione di stringa di un numero in una base specificata nell'intero senza segno a 16 bit equivalente. |
| ToUInt16(Object, IFormatProvider) |
Converte il valore dell'oggetto specificato in un intero senza segno a 16 bit mediante le informazioni di formattazione specifiche delle impostazioni cultura indicate. |
| ToUInt16(String, IFormatProvider) |
Converte la rappresentazione di stringa specificata di un numero in un intero senza segno a 16 bit equivalente mediante le informazioni di formattazione specifiche delle impostazioni cultura indicate. |
| ToUInt16(Single) |
Converte il valore del numero a virgola mobile a precisione singola specificato in un intero senza segno a 16 bit equivalente. |
| ToUInt16(UInt64) |
Converte il valore dell'intero senza segno a 64 bit specificato in un intero senza segno a 16 bit equivalente. |
| ToUInt16(SByte) |
Converte il valore dell'intero con segno a 8 bit specificato nell'intero senza segno a 16 bit equivalente. |
| ToUInt16(Char) |
Converte il valore del carattere Unicode specificato nell'intero senza segno a 16 bit equivalente. |
| ToUInt16(Int64) |
Converte il valore dell'intero con segno a 64 bit specificato in un intero senza segno a 16 bit equivalente. |
| ToUInt16(Int32) |
Converte il valore dell'intero con segno a 32 bit specificato in un intero senza segno a 16 bit equivalente. |
| ToUInt16(Int16) |
Converte il valore dell'intero con segno a 16 bit specificato nell'intero senza segno a 16 bit equivalente. |
| ToUInt16(Decimal) |
Converte il valore del numero decimale specificato in un intero senza segno a 16 bit equivalente. |
| ToUInt16(DateTime) |
La chiamata di questo metodo genera sempre un'eccezione InvalidCastException. |
| ToUInt16(Byte) |
Converte il valore dell'intero senza segno a 8 bit specificato nell'intero senza segno a 16 bit equivalente. |
| ToUInt16(Boolean) |
Converte il valore booleano specificato nell'intero senza segno a 16 bit equivalente. |
| ToUInt16(Object) |
Converte il valore dell'oggetto specificato in un intero senza segno a 16 bit. |
| ToUInt16(Double) |
Converte il valore del numero a virgola mobile a precisione doppia specificato in un intero senza segno a 16 bit equivalente. |
ToUInt16(String)
Importante
Questa API non è conforme a CLS.
Converte la rappresentazione di stringa specificata di un numero in un intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(System::String ^ value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (string value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (string? value);[<System.CLSCompliant(false)>]
static member ToUInt16 : string -> uint16Public Shared Function ToUInt16 (value As String) As UShortParametri
- value
- String
Stringa che contiene il numero da convertire.
Restituisce
Intero senza segno a 16 bit equivalente al numero in value oppure 0 (zero) se value è null.
- Attributi
Eccezioni
value non è costituito da un segno facoltativo seguito da una sequenza di cifre (da 0 a 9).
value rappresenta un numero minore di UInt16.MinValue o maggiore di UInt16.MaxValue.
Esempio
Nell'esempio seguente viene eseguito un tentativo di convertire ogni elemento in una matrice di stringhe numeriche in un intero senza segno a 16 bit.
string[] values = { "1603", "1,603", "one", "1.6e03", "1.2e-02",
"-1326", "1074122" };
ushort result;
foreach (string value in values)
{
try {
result = Convert.ToUInt16(value);
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
}
catch (FormatException) {
Console.WriteLine("The {0} value {1} is not in a recognizable format.",
value.GetType().Name, value);
}
catch (OverflowException) {
Console.WriteLine("{0} is outside the range of the UInt16 type.", value);
}
}
// The example displays the following output:
// Converted the String value '1603' to the UInt16 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 UInt16 type.
// 1074122 is outside the range of the UInt16 type.
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 UInt16 type."
// The example displays the following output:
// Converted the String value '1603' to the UInt16 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 UInt16 type.
// 1074122 is outside the range of the UInt16 type.
Dim values() As String = { "1603", "1,603", "one", "1.6e03", "1.2e-02", _
"-1326", "1074122" }
Dim result As UShort
For Each value As String In values
Try
result = Convert.ToUInt16(value)
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
value.GetType().Name, value, _
result.GetType().Name, result)
Catch e As FormatException
Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
value.GetType().Name, value)
Catch e As OverflowException
Console.WriteLine("{0} is outside the range of the UInt16 type.", value)
End Try
Next
' The example displays the following output:
' Converted the String value '1603' to the UInt16 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 UInt16 type.
' 1074122 is outside the range of the UInt16 type.
Commenti
L'uso del ToUInt16(String) metodo equivale al passaggio value al UInt16.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 non riesce, è invece possibile chiamare il UInt16.TryParse metodo . Restituisce un Boolean valore che indica se la conversione ha avuto esito positivo o negativo.
Si applica a
ToUInt16(UInt16)
Importante
Questa API non è conforme a CLS.
Restituisce l'intero senza segno a 16 bit specificato; non viene eseguita alcuna conversione effettiva.
public:
static System::UInt16 ToUInt16(System::UInt16 value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (ushort value);[<System.CLSCompliant(false)>]
static member ToUInt16 : uint16 -> uint16Public Shared Function ToUInt16 (value As UShort) As UShortParametri
- value
- UInt16
Intero senza segno a 16 bit da restituire.
Restituisce
value viene restituito invariato.
- Attributi
Si applica a
ToUInt16(UInt32)
Importante
Questa API non è conforme a CLS.
Converte il valore dell'intero senza segno a 32 bit specificato in un intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(System::UInt32 value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (uint value);[<System.CLSCompliant(false)>]
static member ToUInt16 : uint32 -> uint16Public Shared Function ToUInt16 (value As UInteger) As UShortParametri
- value
- UInt32
Intero senza segno a 32 bit da convertire.
Restituisce
Intero senza segno a 16 bit equivalente a value.
- Attributi
Eccezioni
value è maggiore di UInt16.MaxValue.
Esempio
L'esempio seguente tenta di convertire ogni elemento in una matrice di interi senza segno in un intero senza segno a 16 bit.
uint[] numbers = { UInt32.MinValue, 121, 340, UInt32.MaxValue };
ushort result;
foreach (uint number in numbers)
{
try {
result = Convert.ToUInt16(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 UInt16 type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// Converted the UInt32 value '0' to the UInt16 value 0.
// Converted the UInt32 value '121' to the UInt16 value 121.
// Converted the UInt32 value '340' to the UInt16 value 340.
// The UInt32 value 4294967295 is outside the range of the UInt16 type.
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 UInt16 type."
// The example displays the following output:
// Converted the UInt32 value '0' to the UInt16 value 0.
// Converted the UInt32 value '121' to the UInt16 value 121.
// Converted the UInt32 value '340' to the UInt16 value 340.
// The UInt32 value 4294967295 is outside the range of the UInt16 type.
Dim numbers() As UInteger = { UInt32.MinValue, 121, 340, UInt32.MaxValue }
Dim result As UShort
For Each number As UInteger In numbers
Try
result = Convert.ToUInt16(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 UInt16 type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' Converted the UInt32 value '0' to the UInt16 value 0.
' Converted the UInt32 value '121' to the UInt16 value 121.
' Converted the UInt32 value '340' to the UInt16 value 340.
' The UInt32 value 4294967295 is outside the range of the UInt16 type.
Si applica a
ToUInt16(String, Int32)
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 16 bit equivalente.
public:
static System::UInt16 ToUInt16(System::String ^ value, int fromBase);[System.CLSCompliant(false)]
public static ushort ToUInt16 (string value, int fromBase);[System.CLSCompliant(false)]
public static ushort ToUInt16 (string? value, int fromBase);[<System.CLSCompliant(false)>]
static member ToUInt16 : string * int -> uint16Public Shared Function ToUInt16 (value As String, fromBase As Integer) As UShortParametri
- 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
Intero senza segno a 16 bit equivalente al numero in value oppure 0 (zero) se value è null.
- Attributi
Eccezioni
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.
value è Empty.
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.
value, che rappresenta un numero senza segno non in base 10, è preceduto da un segno negativo.
-oppure-
value rappresenta un numero minore di UInt16.MinValue o maggiore di UInt16.MaxValue.
Esempio
L'esempio seguente tenta di interpretare ogni elemento in una matrice di stringhe numeriche come valore esadecimale e di convertirlo in un intero senza segno a 16 bit.
using System;
public class Example
{
public static void Main()
{
string[] hexStrings = { "8000", "0FFF", "f000", "00A30", "D", "-13",
"9AC61", "GAD" };
foreach (string hexString in hexStrings)
{
try {
ushort number = Convert.ToUInt16(hexString, 16);
Console.WriteLine("Converted '{0}' to {1:N0}.", hexString, number);
}
catch (FormatException) {
Console.WriteLine("'{0}' is not in the correct format for a hexadecimal number.",
hexString);
}
catch (OverflowException) {
Console.WriteLine("'{0}' is outside the range of an Int16.", hexString);
}
catch (ArgumentException) {
Console.WriteLine("'{0}' is invalid in base 16.", hexString);
}
}
}
}
// The example displays the following output:
// Converted '8000' to 32,768.
// Converted '0FFF' to 4,095.
// Converted 'f000' to 61,440.
// Converted '00A30' to 2,608.
// Converted 'D' to 13.
// '-13' is invalid in base 16.
// '9AC61' is outside the range of an Int16.
// 'GAD' is not in the correct format for a hexadecimal number.
open System
let hexStrings =
[| "8000"; "0FFF"; "f000"; "00A30"
"D"; "-13"; "9AC61"; "GAD" |]
for hexString in hexStrings do
try
let number = Convert.ToUInt16(hexString, 16)
printfn $"Converted '{hexString}' to {number:N0}."
with
| :? FormatException ->
printfn $"'{hexString}' is not in the correct format for a hexadecimal number."
| :? OverflowException ->
printfn $"'{hexString}' is outside the range of an Int16."
| :? ArgumentException ->
printfn $"'{hexString}' is invalid in base 16."
// The example displays the following output:
// Converted '8000' to 32,768.
// Converted '0FFF' to 4,095.
// Converted 'f000' to 61,440.
// Converted '00A30' to 2,608.
// Converted 'D' to 13.
// '-13' is invalid in base 16.
// '9AC61' is outside the range of an Int16.
// 'GAD' is not in the correct format for a hexadecimal number.
Module Example
Public Sub Main()
Dim hexStrings() As String = { "8000", "0FFF", "f000", "00A30", "D", _
"-13", "9AC61", "GAD" }
For Each hexString As String In hexStrings
Try
Dim number As UShort = Convert.ToUInt16(hexString, 16)
Console.WriteLine("Converted '{0}' to {1:N0}.", hexString, number)
Catch e As FormatException
Console.WriteLine("'{0}' is not in the correct format for a hexadecimal number.", _
hexString)
Catch e As OverflowException
Console.WriteLine("'{0}' is outside the range of an Int16.", hexString)
Catch e As ArgumentException
Console.WriteLine("'{0}' is invalid in base 16.", hexString)
End Try
Next
End Sub
End Module
' ' The example displays the following output:
' Converted '8000' to 32,768.
' Converted '0FFF' to 4,095.
' Converted 'f000' to 61,440.
' Converted '00A30' to 2,608.
' Converted 'D' to 13.
' '-13' is invalid in base 16.
' '9AC61' is outside the range of an Int16.
' 'GAD' is not in the correct format for a hexadecimal number.
Commenti
Se fromBase è 16, è possibile anteporre il numero specificato dal value parametro con "0x" o "0X".
Poiché il UInt16 tipo di dati supporta solo valori senza segno, il ToUInt16(String, Int32) metodo presuppone che value venga espresso usando una rappresentazione binaria senza segno. In altre parole, tutti i 16 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 con segno non compreso nell'intervallo del UInt16 tipo di dati viene convertito in un UInt16 valore senza che il metodo generi un'eccezione. Nell'esempio seguente viene eseguita la conversione Int16.MinValue nella relativa rappresentazione di stringa esadecimale e quindi viene chiamato il ToUInt16(String, Int32) metodo . Anziché generare un'eccezione, il metodo visualizza il messaggio "0x8000 converte in 32768".
// Create a hexadecimal value out of range of the UInt16 type.
string value = Convert.ToString(Int16.MinValue, 16);
// Convert it back to a number.
try
{
UInt16 number = Convert.ToUInt16(value, 16);
Console.WriteLine("0x{0} converts to {1}.", value, number);
}
catch (OverflowException)
{
Console.WriteLine("Unable to convert '0x{0}' to an unsigned short integer.",
value);
}
// Create a hexadecimal value out of range of the UInt16 type.
let value = Convert.ToString(Int16.MinValue, 16)
// Convert it back to a number.
try
let number = Convert.ToUInt16(value, 16)
printfn $"0x{value} converts to {number}."
with :? OverflowException ->
printfn $"Unable to convert '0x{value}' to an unsigned short integer."
' Create a hexadecimal value out of range of the UInt16 type.
Dim value As String = Convert.ToString(Short.MinValue, 16)
' Convert it back to a number.
Try
Dim number As UInt16 = Convert.ToUInt16(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 short 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 utilizza la rappresentazione di complemento di due durante la conversione di una stringa esadecimale in un UInt16 valore. Nell'esempio viene determinato se un valore rappresenta un intero con segno o senza segno durante la conversione di tale valore nella relativa rappresentazione di stringa. Quando l'esempio converte il valore in un UInt16 valore, controlla se il valore originale è un intero con segno. In tal caso, e se il relativo bit di 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 UInt16 type.
short sourceNumber = Int16.MinValue;
bool isSigned = Math.Sign((short)sourceNumber.GetType().GetField("MinValue").GetValue(null)) == -1;
string value = Convert.ToString(sourceNumber, 16);
UInt16 targetNumber;
try
{
targetNumber = Convert.ToUInt16(value, 16);
if (isSigned && ((targetNumber & 0x8000) != 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 short integer.", value);
}
// Displays the following to the console:
// Unable to convert '0x8000' to an unsigned short integer.
// Create a negative hexadecimal value out of range of the UInt16 type.
let sourceNumber = Int16.MinValue
let isSigned = sign (sourceNumber.GetType().GetField("MinValue").GetValue null :?> int16) = -1
let value = Convert.ToString(sourceNumber, 16)
try
let targetNumber = Convert.ToUInt16(value, 16)
if isSigned && targetNumber &&& 0x8000us <> 0us then
raise (OverflowException())
else
printfn $"0x{value} converts to {targetNumber}."
with :? OverflowException ->
printfn $"Unable to convert '0x{value}' to an unsigned short integer."
// Displays the following to the console:
// Unable to convert '0x8000' to an unsigned short integer.
' Create a negative hexadecimal value out of range of the UInt16 type.
Dim sourceNumber As Short = Short.MinValue
Dim isSigned As Boolean = Math.Sign(sourceNumber.MinValue) = -1
Dim value As String = Convert.ToString(sourceNumber, 16)
Dim targetNumber As UInt16
Try
targetNumber = Convert.ToUInt16(value, 16)
If isSigned And ((targetNumber And &H8000) <> 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 short integer.", _
value)
End Try
' Displays the following to the console:
' Unable to convert '0x8000' to an unsigned short integer.
Si applica a
ToUInt16(Object, IFormatProvider)
Importante
Questa API non è conforme a CLS.
Converte il valore dell'oggetto specificato in un intero senza segno a 16 bit mediante le informazioni di formattazione specifiche delle impostazioni cultura indicate.
public:
static System::UInt16 ToUInt16(System::Object ^ value, IFormatProvider ^ provider);[System.CLSCompliant(false)]
public static ushort ToUInt16 (object value, IFormatProvider provider);[System.CLSCompliant(false)]
public static ushort ToUInt16 (object? value, IFormatProvider? provider);[<System.CLSCompliant(false)>]
static member ToUInt16 : obj * IFormatProvider -> uint16Public Shared Function ToUInt16 (value As Object, provider As IFormatProvider) As UShortParametri
- value
- Object
Oggetto che implementa l'interfaccia IConvertible.
- provider
- IFormatProvider
Oggetto che fornisce informazioni di formattazione specifiche delle impostazioni cultura.
Restituisce
Intero senza segno a 16 bit equivalente a value oppure zero se value è null.
- Attributi
Eccezioni
Il formato di value non è appropriato.
value rappresenta un numero minore di UInt16.MinValue o maggiore di UInt16.MaxValue.
Esempio
Nell'esempio seguente viene definita una HexString classe che implementa l'interfaccia IConvertible e progettata per contenere la rappresentazione di stringa dei valori con segno a 16 bit e senza segno a 16 bit. La classe include una Sign proprietà che indica il segno del relativo 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 > 4)
throw new ArgumentException("The string representation of a 160bit integer cannot have more than four characters.");
else if (! Regex.IsMatch(value, "([0-9,A-F]){1,4}", RegexOptions.IgnoreCase))
throw new ArgumentException("The hexadecimal representation of a 16-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.ToInt16(hexString, 16)));
else
try {
return Convert.ToByte(UInt16.Parse(hexString, NumberStyles.HexNumber));
}
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt16(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.ToInt16(hexString, 16)));
}
UInt16 codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber);
return Convert.ToChar(codePoint);
}
public DateTime ToDateTime(IFormatProvider provider)
{
throw new InvalidCastException("Hexadecimal to DateTime conversion is not supported.");
}
public decimal ToDecimal(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
{
short hexValue = Int16.Parse(hexString, NumberStyles.HexNumber);
return Convert.ToDecimal(hexValue);
}
else
{
ushort hexValue = UInt16.Parse(hexString, NumberStyles.HexNumber);
return Convert.ToDecimal(hexValue);
}
}
public double ToDouble(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToDouble(Int16.Parse(hexString, NumberStyles.HexNumber));
else
return Convert.ToDouble(UInt16.Parse(hexString, NumberStyles.HexNumber));
}
public short ToInt16(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Int16.Parse(hexString, NumberStyles.HexNumber);
else
try {
return Convert.ToInt16(UInt16.Parse(hexString, NumberStyles.HexNumber));
}
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is out of range of the Int16 type.",
Convert.ToUInt16(hexString, 16)), e);
}
}
public int ToInt32(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToInt32(Int16.Parse(hexString, NumberStyles.HexNumber));
else
return Convert.ToInt32(UInt16.Parse(hexString, NumberStyles.HexNumber));
}
public long ToInt64(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToInt64(Int16.Parse(hexString, NumberStyles.HexNumber));
else
return Int64.Parse(hexString, NumberStyles.HexNumber);
}
public sbyte ToSByte(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
try {
return Convert.ToSByte(Int16.Parse(hexString, NumberStyles.HexNumber));
}
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
Int16.Parse(hexString, NumberStyles.HexNumber), e));
}
else
try {
return Convert.ToSByte(UInt16.Parse(hexString, NumberStyles.HexNumber));
}
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
UInt16.Parse(hexString, NumberStyles.HexNumber)), e);
}
}
public float ToSingle(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToSingle(Int16.Parse(hexString, NumberStyles.HexNumber));
else
return Convert.ToSingle(UInt16.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 UInt16 ToUInt16(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is outside the range of the UInt16 type.",
Int16.Parse(hexString, NumberStyles.HexNumber)));
else
return UInt16.Parse(hexString, NumberStyles.HexNumber);
}
public UInt32 ToUInt32(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
Int16.Parse(hexString, NumberStyles.HexNumber)));
else
return Convert.ToUInt32(hexString, 16);
}
public UInt64 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 > 4 then
invalidArg "value" "The string representation of a 16 bit integer cannot have more than four characters."
elif Regex.IsMatch(value, "([0-9,A-F]){1,4}", RegexOptions.IgnoreCase) |> not then
invalidArg "value" "The hexadecimal representation of a 16-bit integer contains invalid characters."
else
this.hexString <- value
interface IConvertible with
// IConvertible implementations.
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 $"{Convert.ToInt16(this.hexString, 16)} is out of range of the Byte type.")
else
try
Convert.ToByte(UInt16.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{Convert.ToUInt16(this.hexString, 16)} is out of range of the UInt16 type.", e) )
member this.ToChar(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Convert.ToInt16(this.hexString, 16)} is out of range of the Char type.")
let codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber)
Convert.ToChar codePoint
member _.ToDateTime(provider: IFormatProvider) =
raise (InvalidCastException "Hexadecimal to DateTime conversion is not supported.")
member this.ToDecimal(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
let hexValue = Int16.Parse(this.hexString, NumberStyles.HexNumber)
Convert.ToDecimal hexValue
else
let hexValue = UInt16.Parse(this.hexString, NumberStyles.HexNumber)
Convert.ToDecimal hexValue
member this.ToDouble(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Convert.ToDouble(Int16.Parse(this.hexString, NumberStyles.HexNumber))
else
Convert.ToDouble(UInt16.Parse(this.hexString, NumberStyles.HexNumber))
member this.ToInt16(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Int16.Parse(this.hexString, NumberStyles.HexNumber)
else
try
Convert.ToInt16(UInt16.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{Convert.ToUInt16(this.hexString, 16)} is out of range of the Int16 type.", e) )
member this.ToInt32(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Convert.ToInt32(Int16.Parse(this.hexString, NumberStyles.HexNumber))
else
Convert.ToInt32(UInt16.Parse(this.hexString, NumberStyles.HexNumber))
member this.ToInt64(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
Convert.ToInt64(Int16.Parse(this.hexString, NumberStyles.HexNumber))
else
Int64.Parse(this.hexString, NumberStyles.HexNumber)
member this.ToSByte(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
try
Convert.ToSByte(Int16.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{Int16.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e))
else
try
Convert.ToSByte(UInt16.Parse(this.hexString, NumberStyles.HexNumber))
with :? OverflowException as e ->
raise (OverflowException($"{UInt16.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(Int16.Parse(this.hexString, NumberStyles.HexNumber))
else
Convert.ToSingle(UInt16.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 $"{Int16.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt16 type.")
else
UInt16.Parse(this.hexString, NumberStyles.HexNumber)
member this.ToUInt32(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Int16.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")
else
Convert.ToUInt32(this.hexString, 16)
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 > 4 Then
Throw New ArgumentException("The string representation of a 16-bit integer cannot have more than four characters.")
Else If Not Regex.IsMatch(value, "([0-9,A-F]){1,4}", RegexOptions.IgnoreCase) Then
Throw New ArgumentException("The hexadecimal representation of a 16-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.ToInt16(hexString, 16)))
Else
Try
Return Convert.ToByte(Int16.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt16(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.ToInt16(hexString, 16)))
End If
Dim codePoint As UInt16 = UInt16.Parse(Me.hexString, NumberStyles.HexNumber)
Return Convert.ToChar(codePoint)
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 Short = Int16.Parse(hexString, NumberStyles.HexNumber)
Return Convert.ToDecimal(hexValue)
Else
Dim hexValue As UShort = UInt16.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(Int16.Parse(hexString, NumberStyles.HexNumber))
Else
Return Convert.ToDouble(UInt16.Parse(hexString, NumberStyles.HexNumber))
End If
End Function
Public Function ToInt16(provider As IFormatProvider) As Int16 _
Implements IConvertible.ToInt16
If signBit = SignBit.Negative Then
Return Int16.Parse(hexString, NumberStyles.HexNumber)
Else
Try
Return Convert.ToInt16(UInt16.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt16(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
Return Convert.ToInt32(Int16.Parse(hexString, NumberStyles.HexNumber))
Else
Return Convert.ToInt32(UInt16.Parse(hexString, NumberStyles.HexNumber))
End If
End Function
Public Function ToInt64(provider As IFormatProvider) As Int64 _
Implements IConvertible.ToInt64
If signBit = signBit.Negative Then
Return Convert.ToInt64(Int16.Parse(hexString, NumberStyles.HexNumber))
Else
Return Int64.Parse(hexString, NumberStyles.HexNumber)
End If
End Function
Public Function ToSByte(provider As IFormatProvider) As SByte _
Implements IConvertible.ToSByte
If signBit = signBit.Negative Then
Try
Return Convert.ToSByte(Int16.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
Int16.Parse(hexString, NumberStyles.HexNumber), e))
End Try
Else
Try
Return Convert.ToSByte(UInt16.Parse(hexString, NumberStyles.HexNumber))
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
UInt16.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(Int16.Parse(hexString, NumberStyles.HexNumber))
Else
Return Convert.ToSingle(UInt16.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.", _
Int16.Parse(hexString, NumberStyles.HexNumber)))
Else
Return Convert.ToUInt16(hexString, 16)
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.", _
Int16.Parse(hexString, NumberStyles.HexNumber)))
Else
Return Convert.ToUInt32(hexString, 16)
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.", _
Int16.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 ToUInt16(Object, IFormatProvider) metodo che passa un HexString oggetto come parametro, a sua volta, chiama l'implementazione IConvertible.ToUInt16 della HexString classe .
public class Example
{
public static void Main()
{
ushort positiveValue = 32000;
short negativeValue = -1;
HexString positiveString = new HexString();
positiveString.Sign = (SignBit) Math.Sign(positiveValue);
positiveString.Value = positiveValue.ToString("X2");
HexString negativeString = new HexString();
negativeString.Sign = (SignBit) Math.Sign(negativeValue);
negativeString.Value = negativeValue.ToString("X2");
try {
Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt16(positiveString));
}
catch (OverflowException) {
Console.WriteLine("{0} is outside the range of the UInt16 type.",
Int16.Parse(negativeString.Value, NumberStyles.HexNumber));
}
try {
Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt16(negativeString));
}
catch (OverflowException) {
Console.WriteLine("{0} is outside the range of the UInt16 type.",
Int16.Parse(negativeString.Value, NumberStyles.HexNumber));
}
}
}
// The example displays the following output:
// 0x7D00 converts to 32000.
// -1 is outside the range of the UInt16 type.
let positiveValue = 32000us
let negativeValue = -1s
let mutable positiveString = HexString()
positiveString.Sign <- Math.Sign positiveValue |> enum
positiveString.Value <- positiveValue.ToString "X2"
let mutable negativeString = HexString()
negativeString.Sign <- sign negativeValue |> enum
negativeString.Value <- negativeValue.ToString "X2"
try
printfn $"0x{positiveString.Value} converts to {Convert.ToUInt16 positiveString}."
with :? OverflowException ->
printfn $"{Int16.Parse(negativeString.Value, NumberStyles.HexNumber)} is outside the range of the UInt16 type."
try
printfn $"0x{negativeString.Value} converts to {Convert.ToUInt16 negativeString}."
with :? OverflowException ->
printfn $"{Int16.Parse(negativeString.Value, NumberStyles.HexNumber)} is outside the range of the UInt16 type."
// The example displays the following output:
// 0x7D00 converts to 32000.
// -1 is outside the range of the UInt16 type.
Module Example
Public Sub Main()
Dim positiveValue As UInt16 = 32000
Dim negativeValue As Int16 = -1
Dim positiveString As New HexString()
positiveString.Sign = CType(Math.Sign(positiveValue), SignBit)
positiveString.Value = positiveValue.ToString("X4")
Dim negativeString As New HexString()
negativeString.Sign = CType(Math.Sign(negativeValue), SignBit)
negativeString.Value = negativeValue.ToString("X4")
Try
Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt16(positiveString))
Catch e As OverflowException
Console.WriteLine("{0} is outside the range of the UInt16 type.", _
Int16.Parse(positiveString.Value, NumberStyles.HexNumber))
End Try
Try
Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt16(negativeString))
Catch e As OverflowException
Console.WriteLine("{0} is outside the range of the UInt16 type.", _
Int16.Parse(negativeString.Value, NumberStyles.HexNumber))
End Try
End Sub
End Module
' The example dosplays the following output:
' 0x7D00 converts to 32000.
' -1 is outside the range of the UInt16 type.
Commenti
Il valore restituito è il risultato di richiamare il IConvertible.ToUInt16 metodo del tipo sottostante di value.
provider consente all'utente di specificare informazioni di conversione specifiche delle impostazioni cultura sul contenuto di value. Ad esempio, se value è un String oggetto che rappresenta un numero, provider potrebbe fornire informazioni specifiche delle impostazioni cultura sulla notazione utilizzata 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 .
Si applica a
ToUInt16(String, IFormatProvider)
Importante
Questa API non è conforme a CLS.
Converte la rappresentazione di stringa specificata di un numero in un intero senza segno a 16 bit equivalente mediante le informazioni di formattazione specifiche delle impostazioni cultura indicate.
public:
static System::UInt16 ToUInt16(System::String ^ value, IFormatProvider ^ provider);[System.CLSCompliant(false)]
public static ushort ToUInt16 (string value, IFormatProvider provider);[System.CLSCompliant(false)]
public static ushort ToUInt16 (string? value, IFormatProvider? provider);[<System.CLSCompliant(false)>]
static member ToUInt16 : string * IFormatProvider -> uint16Public Shared Function ToUInt16 (value As String, provider As IFormatProvider) As UShortParametri
- value
- String
Stringa che contiene il numero da convertire.
- provider
- IFormatProvider
Oggetto che fornisce informazioni di formattazione specifiche delle impostazioni cultura.
Restituisce
Intero senza segno a 16 bit equivalente al numero in value oppure 0 (zero) se value è null.
- Attributi
Eccezioni
value non è costituito da un segno facoltativo seguito da una sequenza di cifre (da 0 a 9).
value rappresenta un numero minore di UInt16.MinValue o maggiore di UInt16.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 di stringhe numerica in un intero usando sia questo provider 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 of its
// properties that apply to numbers.
NumberFormatInfo provider = new NumberFormatInfo();
provider.PositiveSign = "pos ";
provider.NegativeSign = "neg ";
// Define an array of strings to convert to UInt16 values.
string[] values= { "34567", "+34567", "pos 34567", "34567.",
"34567.", "65535", "65535", "65535" };
foreach (string value in values)
{
Console.Write("{0,-12:} --> ", value);
try {
Console.WriteLine("{0,17}", Convert.ToUInt16(value, provider));
}
catch (FormatException e) {
Console.WriteLine("{0,17}", e.GetType().Name);
}
}
}
}
// The example displays the following output:
// 34567 --> 34567
// +34567 --> FormatException
// pos 34567 --> 34567
// 34567. --> FormatException
// 34567. --> FormatException
// 65535 --> 65535
// 65535 --> 65535
// 65535 --> 65535
open System
open System.Globalization
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
let provider = NumberFormatInfo()
provider.PositiveSign <- "pos "
provider.NegativeSign <- "neg "
// Define an array of strings to convert to UInt16 values.
let values =
[| "34567"; "+34567"; "pos 34567"; "34567."
"34567."; "65535"; "65535"; "65535" |]
for value in values do
printf $"{value,-12} --> "
try
printfn $"{Convert.ToUInt16(value, provider),17}"
with :? FormatException as e ->
printfn $"{e.GetType().Name,17}"
// The example displays the following output:
// 34567 --> 34567
// +34567 --> FormatException
// pos 34567 --> 34567
// 34567. --> FormatException
// 34567. --> FormatException
// 65535 --> 65535
// 65535 --> 65535
// 65535 --> 65535
Imports System.Globalization
Module Example
Public Sub Main()
' Create a NumberFormatInfo object and set several of its
' properties that apply to numbers.
Dim provider As New NumberFormatInfo()
provider.PositiveSign = "pos "
provider.NegativeSign = "neg "
' Define an array of strings to convert to UInt16 values.
Dim values() As String = { "34567", "+34567", "pos 34567", _
"34567.", "34567.", "65535", _
"65535", "65535" }
For Each value As String In values
Console.Write("{0,-12:} --> ", value)
Try
Console.WriteLine("{0,17}", Convert.ToUInt16(value, provider))
Catch e As FormatException
Console.WriteLine("{0,17}", e.GetType().Name)
End Try
Next
End Sub
End Module
' The example displays the following output:
' 34567 --> 34567
' +34567 --> FormatException
' pos 34567 --> 34567
' 34567. --> FormatException
' 34567. --> FormatException
' 65535 --> 65535
' 65535 --> 65535
' 65535 --> 65535
Commenti
Il valore restituito è il risultato di richiamare UInt16.Parse su value.
provider è un'istanza 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 per NumberFormatInfo le impostazioni cultura correnti.
Se si preferisce non gestire un'eccezione se la conversione ha esito negativo, è possibile chiamare invece il UInt16.TryParse metodo. Restituisce un Boolean valore che indica se la conversione ha avuto esito positivo o negativo.
Si applica a
ToUInt16(Single)
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 16 bit equivalente.
public:
static System::UInt16 ToUInt16(float value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (float value);[<System.CLSCompliant(false)>]
static member ToUInt16 : single -> uint16Public Shared Function ToUInt16 (value As Single) As UShortParametri
- value
- Single
Numero a virgola mobile a precisione singola da convertire.
Restituisce
value, arrotondato all'intero senza segno a 16 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
Eccezioni
value è minore di zero o maggiore di UInt16.MaxValue.
Esempio
Nell'esempio seguente ogni elemento viene convertito in una matrice di String valori in un intero senza segno a 16 bit.
float[] numbers = { Single.MinValue, -1.38e10f, -1023.299f, -12.98f,
0f, 9.113e-16f, 103.919f, 17834.191f, Single.MaxValue };
ushort result;
foreach (float number in numbers)
{
try {
result = Convert.ToUInt16(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("{0} is outside the range of the UInt16 type.", number);
}
}
// The example displays the following output:
// -3.402823E+38 is outside the range of the UInt16 type.
// -1.38E+10 is outside the range of the UInt16 type.
// -1023.299 is outside the range of the UInt16 type.
// -12.98 is outside the range of the UInt16 type.
// Converted the Single value '0' to the UInt16 value 0.
// Converted the Single value '9.113E-16' to the UInt16 value 0.
// Converted the Single value '103.919' to the UInt16 value 104.
// Converted the Single value '17834.19' to the UInt16 value 17834.
// 3.402823E+38 is outside the range of the UInt16 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 UInt16 type."
// The example displays the following output:
// -3.402823E+38 is outside the range of the UInt16 type.
// -1.38E+10 is outside the range of the UInt16 type.
// -1023.299 is outside the range of the UInt16 type.
// -12.98 is outside the range of the UInt16 type.
// Converted the Single value '0' to the UInt16 value 0.
// Converted the Single value '9.113E-16' to the UInt16 value 0.
// Converted the Single value '103.919' to the UInt16 value 104.
// Converted the Single value '17834.19' to the UInt16 value 17834.
// 3.402823E+38 is outside the range of the UInt16 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 UShort
For Each value As Single In values
Try
result = Convert.ToUInt16(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 UInt16 type.", value)
End Try
Next
' The example displays the following output:
' -3.402823E+38 is outside the range of the UInt16 type.
' -1.38E+10 is outside the range of the UInt16 type.
' -1023.299 is outside the range of the UInt16 type.
' -12.98 is outside the range of the UInt16 type.
' Converted the Single value '0' to the UInt16 value 0.
' Converted the Single value '9.113E-16' to the UInt16 value 0.
' Converted the Single value '103.919' to the UInt16 value 104.
' Converted the Single value '17834.19' to the UInt16 value 17834.
' 3.402823E+38 is outside the range of the UInt16 type.
Vedi anche
Si applica a
ToUInt16(UInt64)
Importante
Questa API non è conforme a CLS.
Converte il valore dell'intero senza segno a 64 bit specificato in un intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(System::UInt64 value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (ulong value);[<System.CLSCompliant(false)>]
static member ToUInt16 : uint64 -> uint16Public Shared Function ToUInt16 (value As ULong) As UShortParametri
- value
- UInt64
Intero senza segno a 64 bit da convertire.
Restituisce
Intero senza segno a 16 bit equivalente a value.
- Attributi
Eccezioni
value è maggiore di UInt16.MaxValue.
Esempio
Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di interi lunghi senza segno in un intero senza segno a 16 bit.
ulong[] numbers = { UInt64.MinValue, 121, 340, UInt64.MaxValue };
ushort result;
foreach (ulong number in numbers)
{
try {
result = Convert.ToUInt16(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 UInt16 type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// Converted the UInt64 value '0' to the UInt16 value 0.
// Converted the UInt64 value '121' to the UInt16 value 121.
// Converted the UInt64 value '340' to the UInt16 value 340.
// The UInt64 value 18446744073709551615 is outside the range of the UInt16 type.
let numbers = [| UInt64.MinValue; 121uL; 340uL; UInt64.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 UInt16 type."
// The example displays the following output:
// Converted the UInt64 value '0' to the UInt16 value 0.
// Converted the UInt64 value '121' to the UInt16 value 121.
// Converted the UInt64 value '340' to the UInt16 value 340.
// The UInt64 value 18446744073709551615 is outside the range of the UInt16 type.
Dim numbers() As ULong = { UInt64.MinValue, 121, 340, UInt64.MaxValue }
Dim result As UShort
For Each number As ULong In numbers
Try
result = Convert.ToUInt16(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 UInt16 type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' Converted the UInt64 value '0' to the UInt16 value 0.
' Converted the UInt64 value '121' to the UInt16 value 121.
' Converted the UInt64 value '340' to the UInt16 value 340.
' The UInt64 value 18446744073709551615 is outside the range of the UInt16 type.
Si applica a
ToUInt16(SByte)
Importante
Questa API non è conforme a CLS.
Converte il valore dell'intero con segno a 8 bit specificato nell'intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(System::SByte value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (sbyte value);[<System.CLSCompliant(false)>]
static member ToUInt16 : sbyte -> uint16Public Shared Function ToUInt16 (value As SByte) As UShortParametri
- value
- SByte
Intero con segno a 8 bit da convertire.
Restituisce
Intero senza segno a 16 bit equivalente a value.
- Attributi
Eccezioni
value è minore di zero.
Esempio
L'esempio seguente converte ogni elemento in una matrice di byte firmata in un intero senza segno a 16 bit.
sbyte[] numbers = { SByte.MinValue, -1, 0, 10, SByte.MaxValue };
ushort result;
foreach (sbyte number in numbers)
{
try {
result = Convert.ToUInt16(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("{0} is outside the range of the UInt16 type.", number);
}
}
// The example displays the following output:
// -128 is outside the range of the UInt16 type.
// -1 is outside the range of the UInt16 type.
// Converted the SByte value '0' to the UInt16 value 0.
// Converted the SByte value '10' to the UInt16 value 10.
// Converted the SByte value '127' to the UInt16 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 UInt16 type."
// The example displays the following output:
// -128 is outside the range of the UInt16 type.
// -1 is outside the range of the UInt16 type.
// Converted the SByte value '0' to the UInt16 value 0.
// Converted the SByte value '10' to the UInt16 value 10.
// Converted the SByte value '127' to the UInt16 value 127.
Dim numbers() As SByte = { SByte.MinValue, -1, 0, 10, SByte.MaxValue }
Dim result As UShort
For Each number As SByte In numbers
Try
result = Convert.ToUInt16(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("{0} is outside the range of the UInt16 type.", number)
End Try
Next
' The example displays the following output:
' -128 is outside the range of the UInt16 type.
' -1 is outside the range of the UInt16 type.
' Converted the SByte value '0' to the UInt16 value 0.
' Converted the SByte value '10' to the UInt16 value 10.
' Converted the SByte value '127' to the UInt16 value 127.
Si applica a
ToUInt16(Char)
Importante
Questa API non è conforme a CLS.
Converte il valore del carattere Unicode specificato nell'intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(char value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (char value);[<System.CLSCompliant(false)>]
static member ToUInt16 : char -> uint16Public Shared Function ToUInt16 (value As Char) As UShortParametri
- value
- Char
Carattere Unicode da convertire.
Restituisce
Intero senza segno a 16 bit equivalente a value.
- Attributi
Esempio
L'esempio seguente converte ogni elemento in una matrice di caratteri in un intero senza segno a 16 bit.
char[] chars = { 'a', 'z', '\x0007', '\x03FF',
'\x7FFF', '\xFFFE' };
ushort result;
foreach (char ch in chars)
{
try {
result = Convert.ToUInt16(ch);
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
ch.GetType().Name, ch,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("Unable to convert u+{0} to a UInt16.",
((int)ch).ToString("X4"));
}
}
// The example displays the following output:
// Converted the Char value 'a' to the UInt16 value 97.
// Converted the Char value 'z' to the UInt16 value 122.
// Converted the Char value '' to the UInt16 value 7.
// Converted the Char value '?' to the UInt16 value 1023.
// Converted the Char value '?' to the UInt16 value 32767.
// Converted the Char value '?' to the UInt16 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 UInt16 value 97.
// Converted the Char value 'z' to the UInt16 value 122.
// Converted the Char value '' to the UInt16 value 7.
// Converted the Char value '?' to the UInt16 value 1023.
// Converted the Char value '?' to the UInt16 value 32767.
// Converted the Char value '?' to the UInt16 value 65534.
Dim chars() As Char = { "a"c, "z"c, ChrW(7), ChrW(1023), _
ChrW(Short.MaxValue), ChrW(&hFFFE) }
Dim result As UShort
For Each ch As Char in chars
result = Convert.ToUInt16(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 UInt16 value 97.
' Converted the Char value 'z' to the UInt16 value 122.
' Converted the Char value '' to the UInt16 value 7.
' Converted the Char value '?' to the UInt16 value 1023.
' Converted the Char value '?' to the UInt16 value 32767.
' Converted the Char value '?' to the UInt16 value 65534.
Si applica a
ToUInt16(Int64)
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 16 bit equivalente.
public:
static System::UInt16 ToUInt16(long value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (long value);[<System.CLSCompliant(false)>]
static member ToUInt16 : int64 -> uint16Public Shared Function ToUInt16 (value As Long) As UShortParametri
- value
- Int64
Intero con segno a 64 bit da convertire.
Restituisce
Intero senza segno a 16 bit equivalente a value.
- Attributi
Eccezioni
value è minore di zero o maggiore di UInt16.MaxValue.
Esempio
L'esempio seguente converte ogni elemento in una matrice intero lungo in un intero senza segno a 16 bit.
long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
ushort result;
foreach (long number in numbers)
{
try {
result = Convert.ToUInt16(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 UInt16 type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Int64 value -9223372036854775808 is outside the range of the UInt16 type.
// The Int64 value -1 is outside the range of the UInt16 type.
// Converted the Int64 value '0' to the UInt16 value 0.
// Converted the Int64 value '121' to the UInt16 value 121.
// Converted the Int64 value '340' to the UInt16 value 340.
// The Int64 value 9223372036854775807 is outside the range of the UInt16 type.
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 UInt16 type."
// The example displays the following output:
// The Int64 value -9223372036854775808 is outside the range of the UInt16 type.
// The Int64 value -1 is outside the range of the UInt16 type.
// Converted the Int64 value '0' to the UInt16 value 0.
// Converted the Int64 value '121' to the UInt16 value 121.
// Converted the Int64 value '340' to the UInt16 value 340.
// The Int64 value 9223372036854775807 is outside the range of the UInt16 type.
Dim numbers() As Long = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue }
Dim result As UShort
For Each number As Long In numbers
Try
result = Convert.ToUInt16(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 UInt16 type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' The Int64 value -9223372036854775808 is outside the range of the UInt16 type.
' The Int64 value -1 is outside the range of the UInt16 type.
' Converted the Int64 value '0' to the UInt16 value 0.
' Converted the Int64 value '121' to the UInt16 value 121.
' Converted the Int64 value '340' to the UInt16 value 340.
' The Int64 value 9223372036854775807 is outside the range of the UInt16 type.
Si applica a
ToUInt16(Int32)
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 16 bit equivalente.
public:
static System::UInt16 ToUInt16(int value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (int value);[<System.CLSCompliant(false)>]
static member ToUInt16 : int -> uint16Public Shared Function ToUInt16 (value As Integer) As UShortParametri
- value
- Int32
Intero con segno a 32 bit da convertire.
Restituisce
Intero senza segno a 16 bit equivalente a value.
- Attributi
Eccezioni
value è minore di zero o maggiore di UInt16.MaxValue.
Esempio
Nell'esempio seguente ogni elemento viene convertito in una matrice integer in un intero senza segno a 16 bit.
int[] numbers = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue };
ushort result;
foreach (int number in numbers)
{
try {
result = Convert.ToUInt16(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 UInt16 type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Int32 value -2147483648 is outside the range of the UInt16 type.
// The Int32 value -1 is outside the range of the UInt16 type.
// Converted the Int32 value '0' to the UInt16 value 0.
// Converted the Int32 value '121' to the UInt16 value 121.
// Converted the Int32 value '340' to the UInt16 value 340.
// The Int32 value 2147483647 is outside the range of the UInt16 type.
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 UInt16 type."
// The example displays the following output:
// The Int32 value -2147483648 is outside the range of the UInt16 type.
// The Int32 value -1 is outside the range of the UInt16 type.
// Converted the Int32 value '0' to the UInt16 value 0.
// Converted the Int32 value '121' to the UInt16 value 121.
// Converted the Int32 value '340' to the UInt16 value 340.
// The Int32 value 2147483647 is outside the range of the UInt16 type.
Dim numbers() As Integer = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue }
Dim result As UShort
For Each number As Integer In numbers
Try
result = Convert.ToUInt16(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 UInt16 type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' The Int32 value -2147483648 is outside the range of the UInt16 type.
' The Int32 value -1 is outside the range of the UInt16 type.
' Converted the Int32 value '0' to the UInt16 value 0.
' Converted the Int32 value '121' to the UInt16 value 121.
' Converted the Int32 value '340' to the UInt16 value 340.
' The Int32 value 2147483647 is outside the range of the UInt16 type.
Si applica a
ToUInt16(Int16)
Importante
Questa API non è conforme a CLS.
Converte il valore dell'intero con segno a 16 bit specificato nell'intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(short value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (short value);[<System.CLSCompliant(false)>]
static member ToUInt16 : int16 -> uint16Public Shared Function ToUInt16 (value As Short) As UShortParametri
- value
- Int16
Intero con segno a 16 bit da convertire.
Restituisce
Intero senza segno a 16 bit equivalente a value.
- Attributi
Eccezioni
value è minore di zero.
Esempio
Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice integer a 16 bit in un intero senza segno a 16 bit.
short[] numbers = { Int16.MinValue, -132, 0, 121, 16103, Int16.MaxValue };
ushort result;
foreach (short number in numbers)
{
try {
result = Convert.ToUInt16(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 UInt16 type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Int16 value -32768 is outside the range of the UInt16 type.
// The Int16 value -132 is outside the range of the UInt16 type.
// Converted the Int16 value '0' to the UInt16 value 0.
// Converted the Int16 value '121' to the UInt16 value 121.
// Converted the Int16 value '16103' to the UInt16 value 16103.
// Converted the Int16 value '32767' to the UInt16 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 UInt16 type."
// The example displays the following output:
// The Int16 value -32768 is outside the range of the UInt16 type.
// The Int16 value -132 is outside the range of the UInt16 type.
// Converted the Int16 value '0' to the UInt16 value 0.
// Converted the Int16 value '121' to the UInt16 value 121.
// Converted the Int16 value '16103' to the UInt16 value 16103.
// Converted the Int16 value '32767' to the UInt16 value 32767.
Dim numbers() As Short = { Int16.MinValue, -132, 0, 121, 16103, Int16.MaxValue }
Dim result As UShort
For Each number As Short In numbers
Try
result = Convert.ToUInt16(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 UInt16 type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' The Int16 value -32768 is outside the range of the UInt16 type.
' The Int16 value -132 is outside the range of the UInt16 type.
' Converted the Int16 value '0' to the UInt16 value 0.
' Converted the Int16 value '121' to the UInt16 value 121.
' Converted the Int16 value '16103' to the UInt16 value 16103.
' Converted the Int16 value '32767' to the UInt16 value 32767.
Si applica a
ToUInt16(Decimal)
Importante
Questa API non è conforme a CLS.
Converte il valore del numero decimale specificato in un intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(System::Decimal value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (decimal value);[<System.CLSCompliant(false)>]
static member ToUInt16 : decimal -> uint16Public Shared Function ToUInt16 (value As Decimal) As UShortParametri
- value
- Decimal
Numero decimale da convertire.
Restituisce
value, arrotondato all'intero senza segno a 16 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
Eccezioni
value è minore di zero o maggiore di UInt16.MaxValue.
Esempio
Nell'esempio seguente ogni elemento viene convertito in una matrice di Decimal valori in un intero senza segno a 16 bit.
decimal[] numbers = { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
9214.16m, Decimal.MaxValue };
ushort result;
foreach (decimal number in numbers)
{
try {
result = Convert.ToUInt16(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("{0} is outside the range of the UInt16 type.",
number);
}
}
// The example displays the following output:
// -79228162514264337593543950335 is outside the range of the UInt16 type.
// -1034.23 is outside the range of the UInt16 type.
// -12 is outside the range of the UInt16 type.
// Converted the Decimal value '0' to the UInt16 value 0.
// Converted the Decimal value '147' to the UInt16 value 147.
// Converted the Decimal value '9214.16' to the UInt16 value 9214.
// 79228162514264337593543950335 is outside the range of the UInt16 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 UInt16 type."
// The example displays the following output:
// -79228162514264337593543950335 is outside the range of the UInt16 type.
// -1034.23 is outside the range of the UInt16 type.
// -12 is outside the range of the UInt16 type.
// Converted the Decimal value '0' to the UInt16 value 0.
// Converted the Decimal value '147' to the UInt16 value 147.
// Converted the Decimal value '9214.16' to the UInt16 value 9214.
// 79228162514264337593543950335 is outside the range of the UInt16 type.
Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _
9214.16d, Decimal.MaxValue }
Dim result As UShort
For Each value As Decimal In values
Try
result = Convert.ToUInt16(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 UInt16 type.", _
value)
End Try
Next
' The example displays the following output:
' -79228162514264337593543950335 is outside the range of the UInt16 type.
' -1034.23 is outside the range of the UInt16 type.
' -12 is outside the range of the UInt16 type.
' Converted the Decimal value '0' to the UInt16 value 0.
' Converted the Decimal value '147' to the UInt16 value 147.
' Converted the Decimal value '9214.16' to the UInt16 value 9214.
' 79228162514264337593543950335 is outside the range of the UInt16 type.
Vedi anche
Si applica a
ToUInt16(DateTime)
Importante
Questa API non è conforme a CLS.
La chiamata di questo metodo genera sempre un'eccezione InvalidCastException.
public:
static System::UInt16 ToUInt16(DateTime value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (DateTime value);[<System.CLSCompliant(false)>]
static member ToUInt16 : DateTime -> uint16Public Shared Function ToUInt16 (value As DateTime) As UShortParametri
- value
- DateTime
Valore di data e ora da convertire.
Restituisce
Questa conversione non è supportata. Non vengono restituiti valori.
- Attributi
Eccezioni
Questa conversione non è supportata.
Si applica a
ToUInt16(Byte)
Importante
Questa API non è conforme a CLS.
Converte il valore dell'intero senza segno a 8 bit specificato nell'intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(System::Byte value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (byte value);[<System.CLSCompliant(false)>]
static member ToUInt16 : byte -> uint16Public Shared Function ToUInt16 (value As Byte) As UShortParametri
- value
- Byte
Intero senza segno a 8 bit da convertire.
Restituisce
Intero senza segno a 16 bit equivalente a value.
- Attributi
Esempio
L'esempio seguente converte ogni elemento in una matrice di byte in un intero senza segno a 16 bit.
byte[] bytes = { Byte.MinValue, 14, 122, Byte.MaxValue};
ushort result;
foreach (byte byteValue in bytes)
{
result = Convert.ToUInt16(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 UInt16 value 0.
// Converted the Byte value '14' to the UInt16 value 14.
// Converted the Byte value '122' to the UInt16 value 122.
// Converted the Byte value '255' to the UInt16 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 UInt16 value 0.
// Converted the Byte value '14' to the UInt16 value 14.
// Converted the Byte value '122' to the UInt16 value 122.
// Converted the Byte value '255' to the UInt16 value 255.
Dim bytes() As Byte = { Byte.MinValue, 14, 122, Byte.MaxValue}
Dim result As UShort
For Each number As Byte In bytes
result = Convert.ToUInt16(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 Byte value '0' to the UInt16 value 0.
' Converted the Byte value '14' to the UInt16 value 14.
' Converted the Byte value '122' to the UInt16 value 122.
' Converted the Byte value '255' to the UInt16 value 255.
Si applica a
ToUInt16(Boolean)
Importante
Questa API non è conforme a CLS.
Converte il valore booleano specificato nell'intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(bool value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (bool value);[<System.CLSCompliant(false)>]
static member ToUInt16 : bool -> uint16Public Shared Function ToUInt16 (value As Boolean) As UShortParametri
- value
- Boolean
Valore booleano da convertire.
Restituisce
Il numero 1 se value è true; in caso contrario, 0.
- Attributi
Esempio
Nell'esempio seguente vengono convertiti i valori true booleani e false in interi senza segno a 16 bit.
bool falseFlag = false;
bool trueFlag = true;
Console.WriteLine("{0} converts to {1}.", falseFlag,
Convert.ToInt16(falseFlag));
Console.WriteLine("{0} converts to {1}.", trueFlag,
Convert.ToUInt16(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.ToInt16 falseFlag}."
printfn $"{trueFlag} converts to {Convert.ToInt16 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.ToUInt16(falseFlag))
Console.WriteLine("{0} converts to {1}.", trueFlag, _
Convert.ToUInt16(trueFlag))
' The example displays the following output:
' False converts to 0.
' True converts to 1.
Si applica a
ToUInt16(Object)
Importante
Questa API non è conforme a CLS.
Converte il valore dell'oggetto specificato in un intero senza segno a 16 bit.
public:
static System::UInt16 ToUInt16(System::Object ^ value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (object value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (object? value);[<System.CLSCompliant(false)>]
static member ToUInt16 : obj -> uint16Public Shared Function ToUInt16 (value As Object) As UShortParametri
- value
- Object
Oggetto che implementa l'interfaccia IConvertible oppure null.
Restituisce
Intero senza segno a 16 bit equivalente a value oppure zero se value è null.
- Attributi
Eccezioni
Il formato di value non è appropriato.
value rappresenta un numero minore di UInt16.MinValue o maggiore di UInt16.MaxValue.
Esempio
Nell'esempio seguente viene tentato di convertire ogni elemento in una matrice di oggetti in un intero senza segno a 16 bit.
object[] values= { true, -12, 163, 935, 'x', new DateTime(2009, 5, 12),
"104", "103.0", "-1", "1.00e2", "One", 1.00e2};
ushort result;
foreach (object value in values)
{
try {
result = Convert.ToUInt16(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 UInt16 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 UInt16 exists for the {0} value {1}.",
value.GetType().Name, value);
}
}
// The example displays the following output:
// Converted the Boolean value 'True' to the UInt16 value 1.
// The Int32 value -12 is outside the range of the UInt16 type.
// Converted the Int32 value '163' to the UInt16 value 163.
// Converted the Int32 value '935' to the UInt16 value 935.
// Converted the Char value 'x' to the UInt16 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 UInt16 value 104.
// The String value 103.0 is not in a recognizable format.
// The String value -1 is outside the range of the UInt16 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 UInt16 value 100.
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 UInt16 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 UInt16 value 1.
// The Int32 value -12 is outside the range of the UInt16 type.
// Converted the Int32 value '163' to the UInt16 value 163.
// Converted the Int32 value '935' to the UInt16 value 935.
// Converted the Char value 'x' to the UInt16 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 UInt16 value 104.
// The String value 103.0 is not in a recognizable format.
// The String value -1 is outside the range of the UInt16 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 UInt16 value 100.
Dim values() As Object = { True, -12, 163, 935, "x"c, #5/12/2009#, _
"104", "103.0", "-1", _
"1.00e2", "One", 1.00e2}
Dim result As UShort
For Each value As Object In values
Try
result = Convert.ToUInt16(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 UInt16 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 an Int16 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 UInt16 value 1.
' The Int32 value -12 is outside the range of the UInt16 type.
' Converted the Int32 value '163' to the UInt16 value 163.
' Converted the Int32 value '935' to the UInt16 value 935.
' Converted the Char value 'x' to the UInt16 value 120.
' No conversion to an Int16 exists for the DateTime value 5/12/2009 12:00:00 AM.
' Converted the String value '104' to the UInt16 value 104.
' The String value 103.0 is not in a recognizable format.
' The String value -1 is outside the range of the UInt16 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 UInt16 value 100.
Commenti
Il valore restituito è il risultato di richiamare il IConvertible.ToUInt16 metodo del tipo sottostante di value.
Si applica a
ToUInt16(Double)
Importante
Questa API non è conforme a CLS.
Converte il valore del numero a virgola mobile a precisione doppia specificato in un intero senza segno a 16 bit equivalente.
public:
static System::UInt16 ToUInt16(double value);[System.CLSCompliant(false)]
public static ushort ToUInt16 (double value);[<System.CLSCompliant(false)>]
static member ToUInt16 : double -> uint16Public Shared Function ToUInt16 (value As Double) As UShortParametri
- value
- Double
Numero a virgola mobile a precisione doppia da convertire.
Restituisce
value, arrotondato all'intero senza segno a 16 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
Eccezioni
value è minore di zero o maggiore di UInt16.MaxValue.
Esempio
Nell'esempio seguente ogni elemento viene convertito in una matrice di Double valori in un intero senza segno a 16 bit.
double[] numbers = { Double.MinValue, -1.38e10, -1023.299, -12.98,
0, 9.113e-16, 103.919, 17834.191, Double.MaxValue };
ushort result;
foreach (double number in numbers)
{
try {
result = Convert.ToUInt16(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("{0} is outside the range of the UInt16 type.", number);
}
}
// The example displays the following output:
// -1.79769313486232E+308 is outside the range of the UInt16 type.
// -13800000000 is outside the range of the UInt16 type.
// -1023.299 is outside the range of the UInt16 type.
// -12.98 is outside the range of the UInt16 type.
// Converted the Double value '0' to the UInt16 value 0.
// Converted the Double value '9.113E-16' to the UInt16 value 0.
// Converted the Double value '103.919' to the UInt16 value 104.
// Converted the Double value '17834.191' to the UInt16 value 17834.
// 1.79769313486232E+308 is outside the range of the UInt16 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 UInt16 type."
// The example displays the following output:
// -1.79769313486232E+308 is outside the range of the UInt16 type.
// -13800000000 is outside the range of the UInt16 type.
// -1023.299 is outside the range of the UInt16 type.
// -12.98 is outside the range of the UInt16 type.
// Converted the Double value '0' to the UInt16 value 0.
// Converted the Double value '9.113E-16' to the UInt16 value 0.
// Converted the Double value '103.919' to the UInt16 value 104.
// Converted the Double value '17834.191' to the UInt16 value 17834.
// 1.79769313486232E+308 is outside the range of the UInt16 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 UShort
For Each value As Double In values
Try
result = Convert.ToUInt16(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 UInt16 type.", value)
End Try
Next
' The example displays the following output:
' -1.79769313486232E+308 is outside the range of the UInt16 type.
' -13800000000 is outside the range of the UInt16 type.
' -1023.299 is outside the range of the UInt16 type.
' -12.98 is outside the range of the UInt16 type.
' Converted the Double value '0' to the UInt16 value 0.
' Converted the Double value '9.113E-16' to the UInt16 value 0.
' Converted the Double value '103.919' to the UInt16 value 104.
' Converted the Double value '17834.191' to the UInt16 value 17834.
' 1.79769313486232E+308 is outside the range of the UInt16 type.
Vedi anche
Si applica a
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