IE10 SCRIPT5009: '__doPostBack' is undefined

Question

I am facing a problem on IE10 with ASP.NET controls that requires JavaScript post back[like, link button].

It is properly working on the IE9 version as well as on IE10 Compatibility mode. But on the IE10 standard mode, it is giving below error. SCRIPT5009: '__doPostBack' is undefined

[I have created a demo project with a simple asp:link button that redirects to another page.]

Tried the solution, but didn't work for me

Can anyone suggest fix for this?

Answer 1

There is apparently a bug in the browser definition files that shipped with .NET 2.0 and .NET 4. The definition files do not cater for IE10 as a browser version and hence defaults to a default definition which doesn't support JavaScript.

Scott Hanselman has a very detailed writeup about this issue here: http://www.hanselman.com/blog/BugAndFixASPNETFailsToDetectIE10CausingDoPostBackIsUndefinedJavaScriptErrorOrMaintainFF5ScrollbarPosition.aspx

Scott proposes two solutions, with the first one being the recommended one:

1. Machine-wide fix Download and install a hotfix on the server:

• .Net 4 (http://support.microsoft.com/kb/2600088)
• .Net 2 (http://support.microsoft.com/kb/2600100, http://support.microsoft.com/kb/2608565)

2. Site-only fix Install the App_BrowsersUpdate package from NuGet into your website to import new ie and firefox browser definitions.

• .Net 4 (http://nuget.org/List/Packages/App_BrowsersUpdate)
• .Net 2 (http://nuget.org/List/Packages/App_BrowsersUpdate.net20)

Answer 2

If you have tried the fix and you are still seeing the error in IE11, updating the .net framework to 4.5 would work.