Private/Get-DynamicParam.ps1
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function Get-DynamicParam { <# .NOTES Credit to: http://jrich523.wordpress.com/2013/05/30/powershell-simple-way-to-add-dynamic-parameters-to-advanced-function/ https://github.com/RamblingCookieMonster/PowerShell/blob/master/New-DynamicParam.ps1 .PARAMETER Name Name of the dynamic parameter .PARAMETER Type Type for the dynamic parameter. Default is string .PARAMETER Alias If specified, one or more aliases to assign to the dynamic parameter .PARAMETER ValidateSet If specified, set the ValidateSet attribute of this dynamic parameter .PARAMETER Mandatory If specified, set the Mandatory attribute for this dynamic parameter .PARAMETER ParameterSetName If specified, set the ParameterSet attribute for this dynamic parameter .PARAMETER Position If specified, set the Position attribute for this dynamic parameter .PARAMETER ValueFromPipelineByPropertyName If specified, set the ValueFromPipelineByPropertyName attribute for this dynamic parameter .PARAMETER HelpMessage If specified, set the HelpMessage for this dynamic parameter .PARAMETER DPDictionary If specified, add resulting RuntimeDefinedParameter to an existing RuntimeDefinedParameterDictionary (appropriate for multiple dynamic parameters) If not specified, create and return a RuntimeDefinedParameterDictionary (appropriate for a single dynamic parameter) #> param ( [string] $Name, [System.Type] $Type = [string], [string[]] $Alias = @(), [string[]] $ValidateSet, [switch] $Mandatory, [string] $ParameterSetName = "__AllParameterSets", [int] $Position, [switch] $ValueFromPipelineByPropertyName, [string] $HelpMessage, [validatescript({ if (-not ( $_ -is [System.Management.Automation.RuntimeDefinedParameterDictionary] -or -not $_)) { throw "DPDictionary must be a System.Management.Automation.RuntimeDefinedParameterDictionary object, or not exist" } $True })] $DPDictionary = $false ) # Create attribute object, add attributes, add to collection $ParamAttr = New-Object System.Management.Automation.ParameterAttribute $ParamAttr.ParameterSetName = $ParameterSetName if ($mandatory) { $ParamAttr.Mandatory = $True } if ($Position -ne $null) { $ParamAttr.Position = $Position } if ($ValueFromPipelineByPropertyName) { $ParamAttr.ValueFromPipelineByPropertyName = $True } if ($HelpMessage) { $ParamAttr.HelpMessage = $HelpMessage } $AttributeCollection = New-Object 'Collections.ObjectModel.Collection[System.Attribute]' $AttributeCollection.Add($ParamAttr) # param validation set if specified if ($ValidateSet) { $ParamOptions = New-Object System.Management.Automation.ValidateSetAttribute -ArgumentList $ValidateSet $AttributeCollection.Add($ParamOptions) } # Aliases if specified if ($Alias.count -gt 0) { $ParamAlias = New-Object System.Management.Automation.AliasAttribute -ArgumentList $Alias $AttributeCollection.Add($ParamAlias) } # Create the dynamic parameter $Parameter = New-Object -TypeName System.Management.Automation.RuntimeDefinedParameter -ArgumentList @($Name, $Type, $AttributeCollection) # Add the dynamic parameter to an existing dynamic parameter dictionary, or create the dictionary and add it if ($DPDictionary) { $DPDictionary.Add($Name, $Parameter) } else { $Dictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary $Dictionary.Add($Name, $Parameter) $Dictionary } } |