powershell - Check if a command has run successfully

Question

I've tried enclosing the following in an if statement so I can execute another command if this succeeds:

Get-WmiObject -Class Win32_Share -ComputerName $Server.name -Credential $credentials -Filter "Description='Default share'" | Foreach-Object {
        $Localdrives += $_.Path

but I can't figure out how to do it. I even tried creating a function but I couldn't figure out how to check if the function had successfully completed either.

Answer 1

Try the $? automatic variable:

$share = Get-WmiObject -Class Win32_Share -ComputerName $Server.name -Credential $credentials -Filter "Description='Default share'"

if($?)
{
   "command succeeded"
   $share | Foreach-Object {...}
}
else
{
   "command failed"
}

From about_Automatic_Variables:

$?
   Contains the execution status of the last operation. It contains
TRUE if the last operation succeeded and FALSE if it failed.
...

$LastExitCode
   Contains the exit code of the last Windows-based program that was run.