无法在Validateset中使用预定义数组-Powershell

Question

$vf = @('Veg', 'Fruit')
function Test-ArgumentCompleter {
[CmdletBinding()]
 param (
        [Parameter(Mandatory=$true)]
        [ValidateSet($vf)]
        $Arg
)

}

预期的结果应该是：当编写'test-argumentcompleterf'时，点击tub按钮后，F autocompleted到ful。提前感谢您的帮助！

Answer 1

为了补充@mklement0和@mathias的答案，使用动态参数：

$vf = 'Veg', 'Fruit'

function Test-ArgumentCompleter {
    [CmdletBinding()]
    param ()
    DynamicParam {
        $RuntimeParameterDictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary
        $AttributeCollection = New-Object System.Collections.ObjectModel.Collection[System.Attribute]
        $ParameterAttribute = New-Object System.Management.Automation.ParameterAttribute
        $ParameterAttribute.Mandatory = $true
        $AttributeCollection.Add($ParameterAttribute)
        $ValidateSetAttribute = New-Object System.Management.Automation.ValidateSetAttribute($vf)
        $AttributeCollection.Add($ValidateSetAttribute)
        $RuntimeParameter = New-Object System.Management.Automation.RuntimeDefinedParameter('Arg', [string], $AttributeCollection)
        $RuntimeParameterDictionary.Add('Arg', $RuntimeParameter)
        return $RuntimeParameterDictionary
    }
}

根据预定义参数值的方式,还可以使用动态验证集值：

Class vfValues : System.Management.Automation.IValidateSetValuesGenerator {
    [String[]] GetValidValues() { return 'Veg', 'Fruit' }
}

function Test-ArgumentCompleter {
[CmdletBinding()]
param (
        [Parameter(Mandatory=$true)]
        [ValidateSet([vfValues])]$Arg
    )
}

_{注意:IValidateSetValuesGenerator类[read:interface]是在PowerShell 6.0}中引入的