DynamicParameter.psm1
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Function New-DynamicParameter { <# .SYNOPSIS Creates a Dynamic Parameter (RuntimeDefinedParameter) in one command. .DESCRIPTION With one command, it creates a "RuntimeDefinedParameter" for use in a DynamicParam scriptblock. .PARAMETER Name The name of the parameter. .PARAMETER ValidatedItems The set of values for which the dynamic parameter will use. .PARAMETER Attributes A hashtable of parameter attributes to apply to the parameter. (e.g. - "Mandatory", "Position", etc.) .PARAMETER Aliases A list of parameter "aliases" for the dynamic parameter. .PARAMETER RuntimeType The type of the parameter. The default value is [System.String]. .EXAMPLE New-DynamicParameter -Name "FileName" -Attributes @{ Mandatory = $true; Position = 0; ParameterSetName = "ByFileName" } -Aliases "name", "file" -ValidatedItems (gci -File *).Name #> [CmdletBinding(PositionalBinding=$false)] [OutputType([System.Management.Automation.RuntimeDefinedParameter])] param ( [parameter(Mandatory=$true)] [string] $Name , [parameter(Mandatory=$true)] [array] $ValidatedItems , [hashtable] $Attributes , [array] $Aliases , [type] $RuntimeType = [type]::GetType("System.String") ) $attCol = New-Object System.Collections.ObjectModel.Collection[System.Attribute] $valSet = New-Object System.Management.Automation.ValidateSetAttribute($ValidatedItems) $attCol.Add($valSet) > $null if ($PSBoundParameters["Attributes"]) { $pAtt = New-Object System.Management.Automation.ParameterAttribute -Property $Attributes $attCol.Add($pAtt) > $null } if ($PSBoundParameters["Aliases"]) { $pAlias = New-Object System.Management.Automation.AliasAttribute($Aliases) $attCol.Add($pAlias) > $null } $rtParam = [System.Management.Automation.RuntimeDefinedParameter]::new($Name, $RuntimeType, $attCol) return $rtParam } Function New-DynamicDictionary { <# .SYNOPSIS Creates a dictionary of dynamic parameters. .DESCRIPTION Creates a RuntimeDefinedParameterDictionary of 1 or multiple dynamic parameters. .PARAMETER Parameters A list of 1 or more Dynamic Parameters (RuntimeDefinedParameters). .EXAMPLE DynamicParam { $dynParam1 = New-DynamicParameter -Name "FileName" -Attributes @{ Mandatory = $true; Position = 0; ParameterSetName = "ByFileName" } -Aliases "name", "file" -ValidatedItems (gci -File *).Name $dynParam2 = New-DynamicParameter -Name "FolderName" -Attributes @{ Mandatory = $false; Position = 1; ParameterSetName = "ByFolderName" } -Aliases "folder" -ValidatedItems (gci -Directory *).Name return $(New-DynamicDictionary -Parameters $dynParam1, $dynParam2) } #> [CmdletBinding(PositionalBinding=$false)] [OutputType([System.Management.Automation.RuntimeDefinedParameterDictionary])] param ( [parameter(Mandatory=$true,Position=0)] [System.Management.Automation.RuntimeDefinedParameter[]] $Parameters ) $rtDict = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary foreach ($p in $Parameters) { $rtDict.Add($p.Name, $p) > $null } return $rtDict } |