SByte.MinValue 欄位

定義

命名空間:

System

組件:

System.Runtime.dll

來源:

SByte.cs

代表 SByte 最小的可能值。 這個欄位為常數。

public: System::SByte MinValue = -128;

public const sbyte MinValue = -128;

val mutable MinValue : sbyte

Public Const MinValue As SByte  = -128

欄位值

Value = -128

SByte

範例

下列範例會使用 MinValue 和 MaxValue 欄位，在執行類型轉換之前， Int64 先確認值在類型範圍內 SByte 。 此驗證會在 OverflowException 執行時間防止 。

long longValue = -130;
sbyte byteValue; 

if (longValue <= sbyte.MaxValue && 
    longValue >= sbyte.MinValue)
{    
   byteValue = (sbyte) longValue;
   Console.WriteLine("Converted long integer value to {0}.", byteValue);
}   
else
{
   sbyte rangeLimit;
   string relationship;
   
   if (longValue > sbyte.MaxValue)
   {
      rangeLimit = sbyte.MaxValue;
      relationship = "greater";
   }   
   else
   {
      rangeLimit = sbyte.MinValue;
      relationship = "less";
   }       

   Console.WriteLine("Conversion failure: {0:n0} is {1} than {2}.",  
                     longValue, 
                     relationship, 
                     rangeLimit);
}

let longValue = -130L

if longValue <= int64 SByte.MaxValue && longValue >= int64 SByte.MinValue then
    let byteValue = int8 longValue
    printfn $"Converted long integer value to {byteValue}."
else
    let rangeLimit, relationship =
        if longValue > int64 SByte.MaxValue then
            SByte.MaxValue, "greater"
        else
            SByte.MinValue, "less"

    printfn $"Conversion failure: {longValue:n0} is {relationship} than {rangeLimit}."

Dim longValue As Long = -130
Dim byteValue As SByte 

If longValue <= SByte.MaxValue AndAlso _
   longValue >= SByte.MinValue Then
   byteValue = CSByte(longValue)
   Console.WriteLine("Converted long integer value to {0}.", byteValue)
Else
   Dim rangeLimit As SByte
   Dim relationship As String
   
   If longValue > SByte.MaxValue Then
      rangeLimit = SByte.MaxValue
      relationship = "greater"
   Else
      rangeLimit = SByte.MinValue
      relationship = "less"
   End If       

   Console.WriteLine("Conversion failure: {0:n0} is {1} than {2}.", _ 
                     longValue, _
                     relationship, _
                     rangeLimit)
End If

備註

這個常數的值是 -128;也就是十六進位0x80。

另請參閱

• MaxValue