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Next' scope rules

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Re: QUERY: 'On Error Resume Next' scope rules

Kevin Spencer

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Posts: n/a

06-17-2006

Perhaps the reason you haven't seen any discussion about it here is that

although the "On Error" statement is included in VB.Net for those who have

come from a VB6 or VBScript background (I would suppose), it is not

recommended to use it. ASP and ASP.Net are entirely different technologies.

ASP is purely procedural; ASP.Net is purely object-oriented. In fact, you

are the first person I've ever heard of that has used it.

You might be surprised to learn that the "infamous" try/catch structured

exception handling is part of the .Net specification, and is supported by

VB.Net, C#, and every other .Net language (AFAIK). It is far better to use

try/catch than to use "On Error." You can find it documented here:

http://msdn2.microsoft.com/en-us/library/fk6t46tz.aspx

HTH,

Kevin Spencer

Microsoft MVP

Professional Chicken Salad Alchemist

I recycle.

I send everything back to the planet it came from.

"dhruba.bandopadhyay"

wrote in message news:. com...

> This has been puzzling me for very long time and no where has

> talked about the scope of a 'On Error Resume Next' statement.

> When we program ASP(.NET) pages then we usually like to let

> ASP(.NET) stop at errors and report back to us. However there

> are parts of our scripts that we know an error will be thrown

> and we encapsulate that area inbetween:

> On Error Resume Next

> Err.Clear

> 'Try block

> If Err.Number Then

> 'Catch block

> End If

> On Error GoTo 0

> This is similar to the infamous try {} catch(e) {} blocks in

> Java/C++, etc.

> If we forget the last line 'On Error GoTo 0' then our ASP(.NET)

> scripts runs over all errors thrown and we find it hard to

> find bugs. So the big question is, does 'On Error Resume Next'

> go out of scope when it's written inside a block

> (eg. Function)?

> Function Function1 > On Error Resume Next

> 'Our code

> End Function

> When the Function1 call returns, does the outside calling scope

> automatically stays as it was (On Error GoTo 0)?

> --

> dhruba.bandopadhyay

> Posted via http://www.codecomments.com

Kevin Spencer

" Dynamic LinkButton, ViewState Task list "

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