Documenting TRAP and THROW

re: Documenting TRAP and THROW

jeremypack — Wed, 25 Apr 2007 01:37:54 GMT

Nice but Don and Jeffery could not work out the syntax for:

Trap [ExceptionType] {

either it would seem as they don't have an example of how to express [ExceptionType]

nor does Bruce Payette

Sorry, but if they can't work it out how can I?

re: Documenting TRAP and THROW

Jssmith — Thu, 26 Apr 2007 04:56:59 GMT

Umm.

Try this in a script file:

trap [System.DivideByZeroException] { write-host ("trapped " + $_.Exception.GetType().Name); continue; }

(1/$null)

It works just fine

Debugging Powershell

kapslock — Sun, 24 Jun 2007 21:58:21 GMT

So why do you care about debugging powershell scripts? Umm unless you have the superhuman ability to

re: Documenting TRAP and THROW

scott zimmerman — Wed, 29 Aug 2007 16:42:10 GMT

Fyi, the sample chapters at Sapien are chapter 1 and 9 (formatting) NOT chapter 11 (trap and throw).

re: Documenting TRAP and THROW

Joel "Jaykul" Bennett — Fri, 07 Sep 2007 21:04:48 GMT

I have to say it: LAME!

It's almost like you guys went out of your way to make sure that all the PowerShell developers and their buddies could make some extra money writing books to fill the voids in your documentation.

What's worse is that this is the first Google hit for powershell trap ... is there anywhere where there is *actual* document about it, instead of a broken link?

re: Documenting TRAP and THROW

Joel "Jaykul" Bennett — Fri, 07 Sep 2007 21:05:43 GMT

http://64.233.169.104/search?q=cache:vo1cixTB8RIJ:www.sapienpress.com/powershell.pdf

re: Documenting TRAP and THROW

jbowles — Wed, 12 Sep 2007 06:18:02 GMT

The book excerpt says "Trap handlers always execute, no matter what ErrorAction you specify"

It seems some commands require -ea 'stop' on the command or set globally with $ErrorActionPreference = "Stop"

re: Documenting TRAP and THROW

Joel "Jaykul" Bennett — Sun, 14 Oct 2007 05:23:14 GMT

How's this for an attempt?

http://huddledmasses.org/trap-exception-in-powershell/

re: Documenting TRAP and THROW

Dave — Sun, 08 Feb 2009 08:58:45 GMT

The link to http://www.sapienpress.com/powershell.pdf is busted

re: Documenting TRAP and THROW

zi makki — Wed, 18 Mar 2009 19:47:27 GMT

The link to the pdf is not working :( Any one have another link I can try?

Cheers for all the hard work!

Trap [Exception] { “In PowerShell” }

It's my life... And I live it... — Fri, 27 Mar 2009 19:58:07 GMT

This is a great example of how to use Trap and Throw in PowerShell to handle errors besides using SilentlyContinue

re: Documenting TRAP and THROW

NewPowerSUser — Tue, 19 May 2009 05:23:57 GMT

Joel "Jaykul" Bennett, that last link to http://huddledmasses.org/trap-exception-in-powershell/ was just perfect. Thanks a ton.