Check if a command has run successfully

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.

you can try :

$res = get-WmiObject -Class Win32_Share -Filter "Description='Default share'"
if ($res -ne $null)
{
foreach ($drv in $res)
{
$Localdrives += $drv.Path
}
}
else
{
# your error
}

There are instances where any of the options are best suitable. Here is another method:

try {
Add-AzureADGroupMember -ObjectId XXXXXXXXXXXXXXXXXXX -RefObjectId (Get-AzureADUser -ObjectID "XXXXXXXXXXXXXX").ObjectId -ErrorAction Stop
Write-Host "Added successfully" -ForegroundColor Green
$Count = $Null
$Count = 1
}
catch {
$Count = $Null
$Count = 0
Write-Host "Failed to add: $($error[0])" -ForegroundColor Red
}

With try and catch, you don't only get the error message returned when it fails, you also have the $count variable assigned the number 0. When the command is successful, your $count value returns 1. At this point, you use this variable value to determine what happens next.

You can use “$error” automatic variable. This will check if the first command throws error or if it completes successfully.

“execute first command”
if($error.count -eq 0)
{
“execute second command”
}


if you want to clear the errors afterwards you can use: `$error.clear()`. This will set the counter of errors to 0.

Or if a failure returns no standard output, that would work for an if statement (*assuming an exception doesn't terminate the pipeline*):

```
if (! (Get-CimInstance Win32_Share -ComputerName $Server.name -Credential $credentials -Filter "Description='Default share'")) {
'command failed'
}
```

Also there's now the or symbol "||" in powershell 7 (works with terminating exceptions):

```
Get-CimInstance Win32_Share -ComputerName $Server.name -Credential $credentials -Filter "Description='Default share'" || 'command failed'
```

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`](

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):

$?
Contains the execution status of the last command.
It contains True if the last command succeeded and False if it failed.
...

$LastExitCode
Contains the exit code of the last native program or PowerShell script that ran.