UInt64.MaxValue UInt64.MaxValue UInt64.MaxValue UInt64.MaxValue Field

Définition

Représente la plus grande valeur possible de UInt64.Represents the largest possible value of UInt64. Ce champ est constant.This field is constant.

public: System::UInt64 MaxValue = 18446744073709551615;
public const ulong MaxValue = 18446744073709551615;
val mutable MaxValue : uint64
Public Const MaxValue As ULong  = 18446744073709551615

Valeur de champ

Exemples

L’exemple suivant utilise le MinValue et MaxValue pour vérifier que les champs un Double valeur se trouve dans la plage de la UInt64 tapez avant d’effectuer une conversion de type.The following example uses the MinValue and MaxValue fields to verify that a Double value is within the range of the UInt64 type before it performs a type conversion. Cela empêche un OverflowException en cours d’exécution.This prevents an OverflowException at run time.

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);
}       
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       

Remarques

La valeur de cette constante est 18,446,744,073,709,551,615 ; Autrement dit, les 0xFFFFFFFFFFFFFFFF hexadécimal.The value of this constant is 18,446,744,073,709,551,615; that is, hexadecimal 0xFFFFFFFFFFFFFFFF.

S’applique à

Voir aussi