How Can I handle Errors in PS [duplicate] - powershell

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How to handle failed variable assignments in powershell? [duplicate]
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Closed 2 years ago.
I'm trying to catch the error from service restart using function. The issue Im having that catch is not doing anything through the script.
Function Service_Restart ($Servers, $Service){
try {
Write-Host "$CurrentDateTime - Restarting Service $Service on Servers $Servers"
ForEach($Serv in $Servers){
Get-Service -ComputerName $Serv -Name $Service | Restart-Service
}
} catch [System.ServiceProcess.ServiceController] {
$error[0].Exception
}
Service_Restart Server1 ServiceName
I'm expecting to see an one line error not the full stack, however I see the entire error.
What I like to see as an example
Restart-Service : Service 'Adobe Acrobat Update Service (AdobeARMservice)' cannot be stopped due to the following error: Cannot open AdobeARMservice service on computer 'Localhost'.
However I'm seeing
Restart-Service : Service 'Adobe Acrobat Update Service (AdobeARMservice)' cannot be stopped due to the following error: Cannot open AdobeARMservice service on computer 'Localhost'.
At C:\user\UTILS_Version3.ps1:48 char:62
+ ... Get-Service -ComputerName $Serv -Name $Service | Restart-Service
+ ~~~~~~~~~~~~~~~
+ CategoryInfo : CloseError: (System.ServiceProcess.ServiceController:ServiceController) [Restart-Service], ServiceCommandException
+ FullyQualifiedErrorId : CouldNotStopService,Microsoft.PowerShell.Commands.RestartServiceCommand
If I run $error[0].Exception manually I get the result I'm looking for but not through the function.
PS C:\Users\> $error[0].Exception
Service 'Adobe Acrobat Update Service (AdobeARMservice)' cannot be stopped due to the following error: Cannot open AdobeARMservice service on computer '127.0.0.1'.
PS C:\Users\>

Answer 1

When using try and catch, you must be working with terminating errors. Since some errors are non-terminating, you can force them to be terminating. To ensure your commands generate terminating errors, you can use the common parameter -ErrorAction Stop. Alternatively, you can set $ErrorActionPreference = 'Stop' and all commands within the session will implicitly apply -ErrorAction Stop.
In a catch block, $_ or $PSItem is the caught ErrorRecord object. When handling a specific error, it is best to use the error type's full name. You can retrieve that with $_.Exception.GetType().Fullname in the catch block or $error[0].Exception.GetType().Fullname outside of try {} catch {}.
Putting this all together, you can do the following:
try {
Get-Service -ComputerName $Serv -Name $Service -ErrorAction Stop |
Restart-Service -ErrorAction Stop
} catch [Microsoft.PowerShell.Commands.ServiceCommandException] {
$_.Exception
}
See About Try Catch Finally for more information.