PowerShell pass a switch to a function with Invoke-Command

Question

I'm having some difficulties passing the switch -CleanFolders to a function by using Invoke-Command. I found this, but I don't really know how to implement it as it's not targeted to a function.

Calling my function like this works fine:

Delete-OldFiles $Target $OlderThanDays $Server -CleanFolders
Invoke-Command -ComputerName $Server -Credential $Credentials -ScriptBlock ${Function:Delete-OldFiles} -ArgumentList ($Target, $OlderThanDays, $Server)

But this doesn't work at all:

Invoke-Command -ComputerName $Server -Credential $Credentials -ScriptBlock ${Function:Delete-OldFiles} -ArgumentList ($Target, $OlderThanDays, $Server, -CleanFolders)

Ansgar Wiechers · Accepted Answer · 2014-06-10 13:41:32Z

2

Try like this:

$sb = {
  function Delete-OldFiles {
    #...
  }

  Delete-OldFiles $args[0] $args[1] $args[2] -CleanFolders:$args[3]
}

Invoke-Command -ComputerName $Server -Authentication Credssp `
  -Credential $Credentials -ScriptBlock $sb `
  -ArgumentList ($Target, $OlderThanDays, $Server, $true)

edited Jun 10, 2014 at 13:41

answered Jun 3, 2014 at 13:11

Ansgar Wiechers

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7 Comments

DarkLite1 Over a year ago

This seems to be only working when I change this if ($CleanFolders) to this if ($CleanFolders=$True), but then it always works...

Ansgar Wiechers Over a year ago

@DarkLite1 There is no conditional in the code you posted. Please update your question with the rest of your code. Also, = is an assignment operator in PowerShell, not a comparison operator. That would be -eq.

Ansgar Wiechers Over a year ago

@DarkLite1 Evaluating the switch -CleanFolders in a statement if ($CleanFolders) worked just fine for me.

DarkLite1 Over a year ago

You're right, I've did a full update on the code because I didn't copy paste everything. Now you can see the full source.. The problem is that the function can't be executed by Invoke-Command because it's in the script block $JobFuncnow, it only works for Start-Joband I can't seem to find the correct syntax for Invoke-Command. Sorry for the confusion...

Ansgar Wiechers Over a year ago

@DarkLite1 Can't you define a scriptblock containing the function as well as the function call and use that scriptblock for both Start-Job and Invoke-Command? See updated answer.

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