Invoke-command -ArgumentList parameter syntax

powershell powershell-remoting
Glenn picture Glenn · May 20, 2014 · Viewed 59.6k times · Source

I'm trying to add multiple csv-imported lists to a remote executed PS script. It works fine when I pass only one list using the following command:

Invoke-Command -filepath $createSAPSPath -ConnectionUri $uri -Credential $credential -ArgumentList (,$accountsList)

What would be the correct syntax for multiple list objects? I've tried:

Invoke-Command -filepath $createSAPSPath -ConnectionUri $uri -Credential $credential -ArgumentList (,$accountsList),(,$groupsList)

But it doesn't seem to work...

Thanks,

Glenn

Answer

BartekB picture BartekB · May 20, 2014

You have to realize why you need unary comma in the first situation, to understand why its not needed in the second one.

Parameter -ArgumentList takes Object[] argument type. If you are passing single collection, you need to prevent PowerShell from treating single argument (that happens to be a collection) as collection of arguments passed to this parameter.

If you pass something that is collection already (e.g. $AnyObject, $EvenCollection), regardless of the type of individual objects, PowerShell will do what users usually expect: pass first collection to first parameter, second collection to the second parameter.

To sum it up: you should be able to run this like that:

Invoke-Command -filepath $createSAPSPath -ConnectionUri $uri -Credential $credential -ArgumentList $accountsList, $groupList

... and get expected results.

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