Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server."

Question

I have couple of update panels and jquery tabs on page. And also I am loading couple user controls on update panels. After user waited for couple of minutes (not checked the

Answer 1

" 1- Go to the web.config of your application "

" 2- Add a new entry under < system.web > "

3- Also Find the pages tag and set validateRequest=False

Only this works for me. !!

Answer 2

This was working fine in my code.. i solved my issue.. really

Add below code in web.config file.

<system.web>
    <httpRuntime executionTimeout="999" maxRequestLength="2097151"/>
</system.web>

Answer 3

This issue sometimes occurs when you have a control registered as an AsyncPostbackTrigger in multiple update panels.

If that's not the problem, try adding the following right after the script manager declaration:

<script type="text/javascript" language="javascript">
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
    function EndRequestHandler(sender, args){
        if (args.get_error() != undefined){
            args.set_errorHandled(true);
        }
    }
</script>

There are a few more solutions discussed here: http://forums.asp.net/t/1066976.aspx/9/10

Answer 4

Brother this piece of code is not a solution just change it to

<script type="text/javascript" language="javascript">
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
    function EndRequestHandler(sender, args){
        if (args.get_error() != undefined){
            **alert(args.get_error().message.substr(args.get_error().name.length + 2));**
            args.set_errorHandled(true);
        }
    }
</script>

and you will see the error is there but you are just not throwing it on UI.

Answer 5

Check your Application Event Log - my issue was Telerik RadCompression HTTP Module which I disabled in the Web.config.

Answer 6

Use the following code below inside updatepanel.

<script type="text/javascript" language="javascript">
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
    function EndRequestHandler(sender, args){
        if (args.get_error() != undefined){
            args.set_errorHandled(true);
        }
    }
</script>