Mastering Windows PowerShell Scripting - Third Edition

Using the RuntimeDefinedParameterDictionary

RuntimeDefinedParameterDictionary is the expected output from the dynamicparam block. The dictionary must contain all of the dynamic parameters a function is expected to present.

The following example creates a dictionary and adds a single parameter:

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    }}