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Application Level Error Handler?

Without writing try/catch statements is there a way to have a global error
handler in VB.NET? In ASP.NET there is an application level error handler
inside Global.asax, but is there something similar for VB.NET winform
programs?

Thanks!

--
Lucas Tam (RE********@rogers.com)
Please delete "REMOVE" from the e-mail address when replying.
http://members.ebay.com/aboutme/coolspot18/
Nov 20 '05 #1
2 3035
Lucas,
Depending on the type of application you are creating, .NET has three
different global exception handlers.

For ASP.NET look at:
System.Web.HttpApplication.Error event
Normally placed in your Global.asax file.

For console applications look at:
System.AppDomain.UnhandledException event
Use AddHandler in your Sub Main.

For Windows Forms look at:
System.Windows.Forms.Application.ThreadException event
Use AddHandler in your Sub Main.

It can be beneficial to combine the above global handlers in your app, as
well as wrap your Sub Main in a try catch itself.

There is an article in the June 2004 MSDN Magazine that shows how to
implement the global exception handling in .NET that explains why & when you
use multiple of the above handlers...

http://msdn.microsoft.com/msdnmag/is...T/default.aspx

For example: In my Windows Forms apps I would have a handler attached to the
Application.ThreadException event, plus a Try/Catch in my Main. The
Try/Catch in Main only catches exceptions if the constructor of the MainForm
raises an exception, the Application.ThreadException handler will catch all
uncaught exceptions from any form/control event handlers.

Hope this helps
Jay
"Lucas Tam" <RE********@rogers.com> wrote in message
news:Xn***************************@140.99.99.130.. .
Without writing try/catch statements is there a way to have a global error
handler in VB.NET? In ASP.NET there is an application level error handler
inside Global.asax, but is there something similar for VB.NET winform
programs?

Thanks!

--
Lucas Tam (RE********@rogers.com)
Please delete "REMOVE" from the e-mail address when replying.
http://members.ebay.com/aboutme/coolspot18/

Nov 20 '05 #2
"Jay B. Harlow [MVP - Outlook]" <Ja************@msn.com> wrote in
news:e6**************@TK2MSFTNGP12.phx.gbl:
For Windows Forms look at:
System.Windows.Forms.Application.ThreadException event
Use AddHandler in your Sub Main.


Great - this is what I was looking for.

Thank you!

--
Lucas Tam (RE********@rogers.com)
Please delete "REMOVE" from the e-mail address when replying.
http://members.ebay.com/aboutme/coolspot18/
Nov 20 '05 #3

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