I have a website using Asp.Net 2.0 that is Ajax enabled and am experiencing a problem that I have been unable to resolve.

Everything works fine until the session times out.

Then, when this has timed out, I get this error in a Windows Internet Explorer message box: -

Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.

Details: Error parsing near ‘<script type=’text/j’.

Then the site will just not function, even if refreshed.  I have to start a new Internet Explorer for it to work again.

Firstly, does anyone know what is likely to be or could be causing this error?

There is also an anomoly, though.

The site is hosted on a shared server.  If I change the timeout for session via web.config, say to 1 or 2 minutes, then when the session expires and the site behaves as I would expect (as per the code).

However, if left for more than 20 minutes, then the problem is there again, even though the session is set to 1 or 2 minutes.

Is there a step here or something I am missing?  Is there another timeout I need to deal with?

Any help on this appreciated.

Thanks,

Darren

 Take a look at this post.

Thanks.

I've looked at this but it hasn't really got me any closer.

There's no calls to Response.Write().

I cannot see anywhere in the project using response filters.

The only reference to HttpModules I can find is this in web.config:

<httpModules>
            <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        </httpModules>

Server trace is not enabled.

There are no calls to Server.Transfer() in the project.

I don't really know where to start with this.

!!!!aaggghhhh

Regards,

Darren

Can you post your code? And you are 100% sure that there is no Response.Write anywhere in your code - Can you do a CTRL+F for it?

There's definitely no Response.Write anywhere in the code.  Double-checked.

I can't post the code unfortunately.

There are two Ajax UpdatePanels being used.  The project also uses masterpages.

It only occurs after the Session has expired!?

Regards - Darren

Can you post the aspx at least? Do you have any ajax exception handler that would get fired if the session expires? Its hard to help without having the code.

I'm happy to e-mail the code but I would not be comfortable with posting the code in the public domain.

Ajax exception handler. ? What would you recommend with regards to an ajax exception handler?

Thanks - Darren

Sure - email it. If possible can you send a complete small website project that reproduces the error?

Ok - I've emailed it over.

Thanks - Darren

Hello Darren,

I have tested your code and I am not able to reproduce the error, even when the timeout expires. Does the error happen randomly?

That is frustrating.

It does happen every time for me.  And on more than one machine (I was getting concerned I had a problem with one PC).  I get the problem in any browser too (IE7, FireFox, Avant)

I've attached a Word file in an e-mail containing the second error I get.  Wondered if that might shed any light on it?

Thanks - Darren

You should be able to see the problem on the live version (www.estateside.co.uk).

If you go to the search page, select "Buy" from the Buy/Let drop down and then click Submit.

Then, leave that browser open for a few hours and come back to it.

When you come back to it, change one of the drop-downs and click "Submit" (I usually just change "Buy" to "Rent" in the buy/let drop down).

You should then see the error appear in an Internet Explorer message box (the message box is not generated by any of my code).

This problem is now hurting.

Thanks - Darren

Ok, I will check that website. Are you able to re-create the error locally as well?