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

Asked 2011-10-24T20:19:09.220
49

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 time approx 40 mins). when user send request from submit button it is giving below error? 

'Sys.WebForms.PageRequestManagerServerErrorException:
Sys.WebForms.PageRequestManagerServerErrorException: An unknown 
error occurred while processing the request on the server. The status 
code returned from the server was: 0' when calling method: 
[nsIDOMEventListener::handleEvent]

I am not able trace this issue to fix. But I am sure. This is causing by Ajax. Gurus, if you knows solution. Please let me know.

c# javascript jquery asp.net ajax
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2 Answers

12

I got this error when I had my button in the GridView in an UpdatePanel... deubbing my code I found that the above error is caused because of another internal error "A potentially dangerous Request.Form value was detected from the client"

Finally I figured out that one of my TextBoxes on the page has XML/HTML content and this in-turn causing above error when I removed the xml/HTML and tested the button click ... it worked as expected.

answered 2012-05-31T19:10:10.193
7

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.

answered 2012-04-18T13:22:14.713

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