powershell - Find the values in ValidateSet

Question

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
}

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

Answer 1

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

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

After your comment:

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


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

The Get-Variable call also works in a function.