Populate parameter list from XML

Question

I need to pull a list of IDs into a powershell paramater validateset like so:

function Do-Stuff {
   [Cmdletbinding()] 
   param(
        [ValidateSet(\"Sea         


        

Answer 1

Alternatively, if you want to use an file to validate against you can use ValidateScript instead of ValidateSet like such:

function Do-Stuff {
   [Cmdletbinding()] 
   param(
        [ValidateScript({if(([xml](gc c:\temp\config.xml)).getElementsByTagName("City").Name -contains $_){$true}else{throw ([xml](gc c:\temp\config.xml)).getElementsByTagName("City").Name}} )]
        [String]$Site
    )

That's based on the ridiculously simplistic XML file:

So, anyway, you can use ValidateScript to run a scriptblock as validation, in which you could load things from an XML file. ValidateSet on the other hand has to have a pre-defined array of strings to validate against.