PowerShell: Try...Catch...Finally 实现方法

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..."
    }

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