在 ValidateSet 中查找值 [英] Find the values in ValidateSet

问题描述

我想知道是否有办法为 ValidateSet 检索子句 Param() 中使用的值.像这样的东西会很棒:

I was wondering if there was a way to retrieve the values used in the clause Param() for ValidateSet. Something like this would be great:

Function Foo {
    Param (
        [ValidateSet('Startup', 'Shutdown', 'LogOn', 'LogOff')]
        [String]$Type = 'Startup'
    )

    $Type.ValidateSet
}

当然，Type 对象上没有这样的属性.是否可以检索 ValidateSet 中设置的值?

But of course there is no such property on the Type object. Is it possible to retrieve the values set in ValidateSet?

推荐答案

function Foo {
    param (
        [ValidateSet('Startup', 'Shutdown', 'LogOn', 'LogOff')]
        [String]$Type = 'Startup'
    )

    $ParameterList = (Get-Command -Name $MyInvocation.MyCommand).Parameters
    $ParameterList["Type"].Attributes.ValidValues
}

发表评论后:

param (
        [ValidateSet('Startup', 'Shutdown', 'LogOn', 'LogOff')]
        [String]$Type = 'Startup'
)


(Get-Variable "Type").Attributes.ValidValues

Get-Variable 调用也适用于函数.

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