UInt64.MaxValue Campo
Definição
public: System::UInt64 MaxValue = 18446744073709551615;
public const ulong MaxValue = 18446744073709551615;
val mutable MaxValue : uint64
Public Const MaxValue As ULong = 18446744073709551615
Valor do campo
Exemplos
O exemplo a seguir usa MinValue os MaxValue campos e para verificar se um Double valor está dentro do intervalo do UInt64 tipo antes de executar uma conversão de tipo.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. Isso impede um OverflowException em tempo de execução.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
Comentários
O valor dessa constante é 18446744073709551615; ou seja, 0xFFFFFFFFFFFFFFFF hexadecimal.The value of this constant is 18,446,744,073,709,551,615; that is, hexadecimal 0xFFFFFFFFFFFFFFFF.