Problem with Sys.WebForms.PageRequestManager.getInstance()._postBackSettings in IE11

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Hi All,

I have a user page in that I have called
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(showWordList);
and the javascript code is .

XML

<pre lang="sql">function showWordList(sender, eventArgs) {

    if (eventArgs.get_error() != undefined) {
        alert(showAjaxCustomError(eventArgs.get_error().message));
        eventArgs.set_errorHandled(true);
    }

    if (Sys.WebForms.PageRequestManager.getInstance()._postBackSettings.panelsToUpdate[0] != null) {
        if (Sys.WebForms.PageRequestManager.getInstance()._postBackSettings.panelsToUpdate[0].indexOf(&quot;upParseQueryUsingDtSearch&quot;) &gt; 0)

}}} </pre>

It arises null reference error at
Sys.WebForms.PageRequestManager.getInstance()._postBackSettings in IE 10 and IE11.
but when I apply debugger and debug line by line it runs properly.I am unable to find out exact problem behind . Is here is the problem with time or something else.

Please help

Posted 30-Jan-14 19:21pm

Mohd Wasif

Updated 15-Mar-16 20:42pm

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ravikhoda · Answer 1 · 2014-01-30T22:28:00

IF that is happen in IE 11 and IE 10 than it may possible that you need to update your browser defination on the server. micrsoft provide some hotfix available for that.

also please check below link.

http://www.hanselman.com/blog/BugAndFixASPNETFailsToDetectIE10CausingDoPostBackIsUndefinedJavaScriptErrorOrMaintainFF5ScrollbarPosition.aspx[^]