# Decimal.ToByte(Decimal) 方法

## 定义

``````public:
static System::Byte ToByte(System::Decimal value);``````
``public static byte ToByte (decimal value);``
``static member ToByte : decimal -> byte``
``Public Shared Function ToByte (value As Decimal) As Byte``

value
Decimal

#### 异常

`value` 小于 MinValue 或大于 MaxValue`value` is less than MinValue or greater than MaxValue.

## 示例

``````using System;

class Example
{
public static void Main( )
{
decimal[] values = { 123m, new Decimal(78000, 0, 0, false, 3),
78.999m, 255.999m, 256m,
127.999m, 128m, -0.999m,
-1m,  -128.999m, -129m };

foreach (var value in values) {
try {
byte number = Decimal.ToByte(value);
Console.WriteLine("{0} --> {1}", value, number);
}
catch (OverflowException e)
{
Console.WriteLine("{0}: {1}", e.GetType().Name, value);
}
}
}
}
// The example displays the following output:
//     78 --> 78
//     78.000 --> 78
//     78.999 --> 78
//     255.999 --> 255
//     OverflowException: 256
//     127.999 --> 127
//     128 --> 128
//     -0.999 --> 0
//     OverflowException: -1
//     OverflowException: -128.999
//     OverflowException: -129
``````
``````Module Example
Public Sub Main()
Dim values() As Decimal = { 78d, New Decimal(78000, 0, 0, false, 3),
78.999d, 255.999d, 256d,
127.999d, 128d, -0.999d,
-1d,  -128.999d, -129d }

For Each value In values
Try
Dim number As Byte = Decimal.ToByte(value)
Console.WriteLine("{0} --> {1}", value, number)
Catch e As OverflowException
Console.WriteLine("{0}: {1}", e.GetType().Name, value)
End Try
Next
End Sub
End Module
' The example displays the following output:
'     78 --> 78
'     78.000 --> 78
'     78.999 --> 78
'     255.999 --> 255
'     OverflowException: 256
'     127.999 --> 127
'     128 --> 128
'     -0.999 --> 0
'     OverflowException: -1
'     OverflowException: -128.999
'     OverflowException: -129
``````