PowerShell script - check for exit code

Question

I have the following script:

foreach ($server in $ProductList.$SelectedServer) {
    Invoke-Command -ComputerName $server -Credential domain\user -ScriptBlock {
        Import-Module WebAdministration
        echo "restarting AppPool $args[0] ... on $args[1]"
        Restart-WebAppPool -Name $args[0] -ErrorAction Stop
        echo "Restarted WebApp $args[0] on $args[1]"
    }
} -ArgumentList $SelectedAppPool, $Server

I would like to check if the Restart-WebAppPool command executes successfully. If it does I echo 'it worked' else echo 'It did not work'.

The goal is to provide a simple plain english message rather than the typical unhandled exception.

Answer 1

In theory, you're most of the way there, I don't know off the top of my head under what circumstances Restart-WebAppPool throws a terminating error, but in order to do anything with them you'll need try/catch blocks:

try {
    Restart-WebAppPool -Name $args[0] -ErrorAction stop
    Write-Host "It worked"
} catch {
    Write-Host "It did not work"
    # Error handling goes here.
}

The "It worked" output will only be displayed if no terminating errors are thrown by Restart-WebAppPool