Mastering Windows PowerShell Scripting - Third Edition

Using dynamic parameters

Dynamic parameters must be accessed using the PSBoundParameters variable within a function or script; dynamic parameters do not initialize variables of their own.

The value of the Action parameter used in the previous examples must be retrieved by using Action as a key, shown as follows:

using namespace System.Management.Automationfunction Test-DynamicParam {    [CmdletBinding()]    param ( )    dynamicparam {        $paramDictionary = [RuntimeDefinedParameterDictionary]::new()        $parameter = [RuntimeDefinedParameter]::new('Action', [String], [Attribute[]]@(                [Parameter]@{ Mandatory = $true; Position = 1 }                [ValidateSet]::new('Start', 'Stop', 'Create', 'Delete')            )        )        $paramDictionary.Add($parameter.Name, $parameter)        $paramDictionary