Handling Errors in PowerShell with Try..Catch..Finally

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The try..catch..finally statements in PowerShell allow you to handle exceptions (errors) in your scripts. One of the unique concepts in PowerShell exceptions is the notion of a terminating error versus a non-terminating error. In this video, we'll explore the difference between both types of exceptions, and learn how to effectively use try..catch..finally to handle exceptions in a calculated manner. In addition, we'll take a look at how to use multiple catch blocks to handle specific types of errors uniquely.

The $ErrorActionPreference variable can be used to control the behavior of PowerShell cmdlets, when an exception is thrown. By setting $ErrorActionPreference to 'stop', you can change non-terminating errors into terminating errors. Only terminating errors are caught by the "try" block, so if you're struggling with a script where try..catch isn't working correctly, you might want to ensure that you're considering terminating versus non-terminating errors as a potential problem.

Producer: Trevor Sullivan

#DevOps #PowerShell #VSCode

0:00 Intro
2:23 Exploring Non-terminating Errors
4:11 Wrap Commands in Try..Catch
8:09 Force Errors to Become Terminating Errors
11:22 Handling Multiple Specific Error Types
15:45 PowerShell Finally Statement
17:38 The $PSItem Automatic Variable

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Комментарии

Thx a lot man! I'm a beginner and i was starting to loose my temper because my catch was not working... i just had to add the ErrorAction and then everything is smoooth! Thx!

vaskatito

Exceptional Explanation! Very well explained and helped me understand the aspects i struggled with. Thanks Trevor!

Nunezy

This was fantastic. Thanks so much for this detailed explanation. I've been using Try/Catch statements, for a while, but was only concerned about any error, I now have a need to look for specific error and this helped me understand how to set that up.

SurferSandman

Excellent! As usual, your teaching talents are exceptional! Thank you so much for sharing your videos with us!

didier_lu

Thanks for clear explanation Trevor, is Finally in Try Catch similar to End block in Powershell Advance Functions can they be used together?

pawandev

This camera quality is amazing Trevor! awesome explanation as well!

GuidoOliveira

Which scenarios would we want to check for the fullyQualifiedErrorId ?

Rekke_yt

The were some improvement regarding Exception Errors in the latest Powershell. The new powershell gives a nicer error

redadz

Thanks for explaining, I've got it :)

roybatty

Very good video. Wish I had found you when I was a Powershell noob!

dylanrobey

it's maybe a bit lame, but could you explain in another video how you move around the lines, select whole sentence in quote or close paretasies from end of the line, in the vsc editor?

poprostukanal

Hello! Do you know, is "finally" removed? I get the error: "the term finally is not recognized as the name of a cmdlet, function, script file, or operable program"
I try this simple example:

try {
Get-Date
}
catch {
"Oh No"
}
finally {
"Ready"
}

HaasiAustria

Excellent video, flow throughout the video is good

benmathew

Fantastic! Thanks a lot for the perfect explanation. 👍

braneshg

Amazing, so well explained. I do like the ErrorActionPreference also, didn't understand that previously. Glad to have found your channel - subscribing now.

stevenls

How did You find the right catch [string]?

roybatty

What is all this about write-host kills puppies? I use it in all of my try catch blocks and it produces fine for me. I also cannot get write-information, warning, or error to work in my try catch block lol. Great video.

cu

Hi Trevor

Please share your secret how you learn about all these details just going through microsoft documentation in detail or there is a secret recipe?

TheAusafonly

Always nice to see handy things like how someone else uses VSCode
, like shortcuts:

Move line of code up/down = Alt-Arrow Up/Down
Duplicate line = <notbound? I bound it to Ctrl-d>
Comment Out line/selection = Ctrl-/

Thanks for your vids!

To please the YT algorithm, a question:
A "file not found" exception can be handled by using test-path before executing the "try" code.
When do you use try/catch, when do you check for pre-reqs (like test-path) before executing a command?

Semtx

Under normal circumstances, how does PowerShell know when a given exception is terminating or not?

ayjay

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