Thread was being aborted

[acko]

Hi,
I have the folowing code

Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNext.Click

Try
     Response.Redirect(Application("sRoot") & "Prva.aspx")

Catch ex As Exception
     Dim Greska As String
     Greska = ex.Message
     Greska = ex.ToString()
     Response.Redirect(Session("sRoot") & "GlobalError.aspx?ER=" & Greska)

End Try

A few days ago this code worked just fine and i could go to Prva.aspx,
but now i always get Exception (Thread was being aborted) and go to GlobalError.aspx.
Why?
Thanks, Alex

[planoie]

Have you changed anything in the application in the last few days? There seems little reason for this to suddenly change unless you made some change with the configuration of the application.

One thing I can point out is that you usually should need to convert what you get from "Application()" into the appropriate data type before using it...

Response.Redirect(CType(Application("sRoot"), String) & "Prva.aspx")

Another suggestion is that if you want to reference a page based on your application root, you can do this:

Response.Redirect(ResolveURL("~/Prva.aspx"))

~ reference the application "home" directory, or the vitual directory. So no matter where this code is called from, the resulting value passed to the redirect will be something like "/MyWebApp/Prva.aspx".

Peter

[inancgumus]

The reason for the error is Response.Redirect method.

If you want to get rid of this exception, use Response.Redirect(url, false).

Instead of putting Response.Redirect into Try..Catch block. You may try this one:

Dim url As String

Try
    url = Application("sRoot") & "Prva.aspx"
Catch ex As Exception
    Dim Greska As String
    Greska = ex.Message
    Greska = ex.ToString()
    url = Session("sRoot") & "GlobalError.aspx?ER=" & Greska
End Try

Response.Redirect(url, False)

Sorry I didnt used to VB.Net, and some syntax error(s) may be occurred.

-----------------------------------------------

I'm going to write some about the situation; it may clarify your mind if you have some patience to read.

Your page is executing by a thread on which asp.net worker process contains. And on some line in your code, an instruction (Response.Redirect) wants to stop the execution because it must be stopped and asp.net framework must be notified about a redirection request.

Asp.net framework catches the Redirect method's exception, aborts the thread and use a new thread for execution of to be redirected page.

This occurs when you specify the second argument of Redirect method as True. Because this means to asp.net framework as 'Stop this page's execution ASAP and execute to be redirected page'.

...
Yesterday, I forgot to write down something about special exception class named ThreadAbortException.

You are getting this exception because Response.Redirect method internally calls Response.End method which raises this exception and the page processing terminates. Response.End raises this exception indirectly through calling Thread.Abort which raises this exception directly.

This exception is a special exception as I have said. The common language runtime has a special attention for this exception. When this exception occurs you can catch it in a catch block of a try...catch structure. And this exception will be raised again by the runtime at the end of the catch block. So, as you see, this is the reason why you are getting this exception even you were encapsulating Response.Redirect in a try...catch block.


Inanc Gumus

Software Architect

can be reached at [email protected]

[acko]

Thanks a lot
Alex

[gueladio]

I am calling a web service from asp.net (both written in VB.NET). When I
call the web service I get a ThreadAbortException (ex.message thread was
being aborted)

This problem does not occur however if I call the same web service from a
windows app. Now this web service and asp.net application is hosted offsite
and I dont have access to the machine.config file to lengthen the timeout
for the web session (let alone restart IIS).

Is there anything I can do to prevent this from happening???

Thanks in advance.

[rstelma]

Inanc Gumus,

Thanks so much for your post. I was getting the same error. Took the response.redirect out of the Try.. Catch block and no more exception.

Very much appreciated.

Thanks,
Richard

[Ulf Lunde]

quote:Originally posted by gueladio
 I am calling a web service from asp.net (both written in VB.NET). When I
call the web service I get a ThreadAbortException (ex.message thread was
being aborted)

It is probably the ASP.NET server on the calling side that
terminates the application. If so, adding a line like this to your
local Web.config file should make the error go away:

   <httpRuntime executionTimeout="300"/>

Ulf Lunde

[anoop.goyal]

This may be solution for specific problems.

But when i send mail and then redirect to a page, it will skip the mail sending and goes to redirected page. But i want to send mail also.

How can i do it?

[dparsons]

Are you calling SmtpMail.Send(mail) before you redirect?

--Stole this from a moderator

I will only tell you how to do it, not do it for you.
Unless, of course, you want to hire me to do work for you.

[Charu26]

quote:Originally posted by inancgumus
 The reason for the error is Response.Redirect method.

If you want to get rid of this exception, use Response.Redirect(url, false).

Instead of putting Response.Redirect into Try..Catch block. You may try this one:

Dim url As String

Try
    url = Application("sRoot") & "Prva.aspx"
Catch ex As Exception
    Dim Greska As String
    Greska = ex.Message
    Greska = ex.ToString()
    url = Session("sRoot") & "GlobalError.aspx?ER=" & Greska
End Try

Response.Redirect(url, False)

Sorry I didnt used to VB.Net, and some syntax error(s) may be occurred.

-----------------------------------------------

I'm going to write some about the situation; it may clarify your mind if you have some patience to read.

Your page is executing by a thread on which asp.net worker process contains. And on some line in your code, an instruction (Response.Redirect) wants to stop the execution because it must be stopped and asp.net framework must be notified about a redirection request.

Asp.net framework catches the Redirect method's exception, aborts the thread and use a new thread for execution of to be redirected page.

This occurs when you specify the second argument of Redirect method as True. Because this means to asp.net framework as 'Stop this page's execution ASAP and execute to be redirected page'.

...
Yesterday, I forgot to write down something about special exception class named ThreadAbortException.

You are getting this exception because Response.Redirect method internally calls Response.End method which raises this exception and the page processing terminates. Response.End raises this exception indirectly through calling Thread.Abort which raises this exception directly.

This exception is a special exception as I have said. The common language runtime has a special attention for this exception. When this exception occurs you can catch it in a catch block of a try...catch structure. And this exception will be raised again by the runtime at the end of the catch block. So, as you see, this is the reason why you are getting this exception even you were encapsulating Response.Redirect in a try...catch block.


Inanc Gumus

Software Architect

can be reached at [email protected]

Thank you for the useful insight. I had the same problem and solved it too. Thank you again. :) Keep up the good work.