UInt64.MaxValue Campo

Definición

Espacio de nombres:

System

Ensamblado:

System.Runtime.dll

Source:

UInt64.cs

Representa el mayor valor posible de UInt64. Este campo es constante.

public: System::UInt64 MaxValue = 18446744073709551615;

public const ulong MaxValue = 18446744073709551615;

val mutable MaxValue : uint64

Public Const MaxValue As ULong  = 18446744073709551615

Valor de campo

Value = 18446744073709551615

UInt64

Ejemplos

En el ejemplo siguiente se usan los MinValue campos y MaxValue para comprobar que un Double valor está dentro del intervalo del tipo antes de UInt64 realizar una conversión de tipos. Esto evita una OverflowException en tiempo de ejecución.

double decimalValue = -1.5;
ulong integerValue; 

// Discard fractional portion of Double value
double decimalInteger = Math.Floor(decimalValue);

if (decimalInteger <= ulong.MaxValue && 
    decimalInteger >= ulong.MinValue)
{    
   integerValue = (ulong) decimalValue;
   Console.WriteLine("Converted {0} to {1}.", decimalValue, integerValue);
}   
else
{
   ulong rangeLimit;
   string relationship;
   
   if (decimalInteger > ulong.MaxValue)
   {
      rangeLimit = ulong.MaxValue;
      relationship = "greater";
   }   
   else
   {
      rangeLimit = ulong.MinValue;
      relationship = "less";
   }       

   Console.WriteLine("Conversion failure: {0} is {1} than {2}.",  
                     decimalInteger, 
                     relationship, 
                     rangeLimit);
}

open System

let decimalValue = -1.5

// Discard fractional portion of Double value
let decimalInteger = floor decimalValue

if decimalInteger <= float UInt64.MaxValue && decimalInteger >= float UInt64.MinValue then
    let integerValue = uint64 decimalValue
    printfn $"Converted {decimalValue} to {integerValue}."
else
    let rangeLimit, relationship =
        if decimalInteger > float UInt64.MaxValue then
            UInt64.MaxValue, "greater"
        else
            UInt64.MinValue, "less"

    printfn $"Conversion failure: {decimalInteger} is {relationship} than {rangeLimit}."

Dim decimalValue As Double = -1.5
Dim integerValue As ULong 

' Discard fractional portion of Double value
Dim decimalInteger As Double = Math.Floor(decimalValue)

If decimalInteger <= ULong.MaxValue AndAlso _
   decimalInteger >= ULong.MinValue Then
   integerValue = CULng(decimalValue)
   Console.WriteLine("Converted {0} to {1}.", decimalValue, integerValue)
Else
   Dim rangeLimit As ULong
   Dim relationship As String
   
   If decimalInteger > ULong.MaxValue Then
      rangeLimit = ULong.MaxValue
      relationship = "greater"
   Else
      rangeLimit = ULong.MinValue
      relationship = "less"
   End If       

   Console.WriteLine("Conversion failure: {0} is {1} than {2}", _ 
                     decimalInteger, _
                     relationship, _
                     rangeLimit)
End If

Comentarios

El valor de esta constante es 18.446.744.073.709.551.615; es decir, 0xFFFFFFFFFFFFFFFF hexadecimal.

Consulte también

• MinValue