Function overloading in PowerShell

Question

Can you overload functions in PowerShell?

I want to my function to accept a string, array or some switch.

An example of what I want:

• Backup-Use

Answer 1

If you use PSObject instead of Object to define your parameter type, it should work. For example, The function Get-Control, know's how to overload based on type string or template and can be called using the positional value:

    Get-Control "A-Name-Of-A-Control"
    Get-Control $template

To make the overload work, use PSObject as follows:

Function Get-Control {
    Param(
        [Parameter(Mandatory=$False,ParameterSetName="ByTemplate",Position=0)]
        [PSObject]
        $Template,

        [Parameter(Mandatory=$False,ParameterSetName="ByName",Position=0)]        
        [String]
        $Name,

        [Parameter(Mandatory=$False)] 
        [Switch]
        $List
      ) 
   ... # remaining code removed for brevity