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Application Level Error Handling - its very urgent

Posted on 2005-03-25
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Last Modified: 2010-05-02
i need to update some database values when my VB application raises run time error at any part of the application
does VB allow Application level error handling if yes then how can i do this.
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Question by:imrancs
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5 Comments
 
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by:Dhaest
ID: 13629601
Do you have any error-logging ?
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by:Erick37
Erick37 earned 400 total points
ID: 13629890
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PaulHews earned 1200 total points
ID: 13630005
You have to have error handling in every sub, and in that error handling, call a central routine.  (Yeah, that sucks I know.  Don't shoot the messenger please. :)  There are products out there that can help you do this.

http://www.aivosto.com/vbwatch.html
http://www.sibental.com/autoerror/autoerror.htm

These are a couple from a seach on vb error handling automation.

The freeware MZTools addon allows you to add error handling to *new* subs and functions but doesn't do a retrofit.
http://www.mztools.com/
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by:PaulHews
PaulHews earned 1200 total points
ID: 13630022
VB.NET has structured error handling and allows you to catch an exception at the application level if needed.  So if you haven't started your project yet, and you aren't that familiar with vb, .NET etc, you might want to review your options.
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by:Robberbaron (robr)
Robberbaron (robr) earned 400 total points
ID: 13642007
VB does have some cascading of errors that should help....

try this
'--------
Option Explicit

Private Sub Command1_Click()
    On Error GoTo cmderr
    test1
    Exit Sub
   
cmderr:
    MsgBox "CmdErr:" & Err.Number, vbCritical + vbOKOnly
   
End Sub


Sub test1()

Err.Raise 27

End Sub


Private Sub Form_Load()

End Sub
'--------

You will see that although the error was raised in the routine Test1(), the error was trapped back at Command1_click as there was no local error handler.

I think that if you have a local error trap, but dont want to handle the particular error there, you can call the err.raise method within the local error routine, forcing the error to cascade back to the previous routine in the call stack.

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