PowerShell: Try...Catch...Finally 实现方法
作者:
PowerShell 本身有很多很好的错误控制,但是习惯于.net编程的人员,更喜欢用Try Catch Finally方法,尤其当有一段代码必须被执行到的时候。现在好了,adweigert 想出了一个好方法来实现。这个函数已经在多种情况下测试过,希望能对你有帮助
复制代码 代码如下:
function Try
{
param
(
[ScriptBlock]$Command = $(throw "The parameter -Command is required."),
[ScriptBlock]$Catch = { throw $_ },
[ScriptBlock]$Finally = {}
)
& {
$local:ErrorActionPreference = "SilentlyContinue"
trap
{
trap
{
& {
trap { throw $_ }
&$Finally
}
throw $_
}
$_ | & { &$Catch }
}
&$Command
}
& {
trap { throw $_ }
&$Finally
}
}
使用示例:
复制代码 代码如下:
# Example usage
Try {
echo " ::Do some work..."
echo " ::Try divide by zero: $(0/0)"
} -Catch {
echo " ::Cannot handle the error (will rethrow): $_"
#throw $_
} -Finally {
echo " ::Cleanup resources..."
}