Hello all,
Recently, I had created an .aspx page and added the ASP.NET Ajax Tab control from the Ajax Control Toolkit. But since I had forgotten to update the web.config of th eweb site project, I had the following error messages when I display the ajax enabled web page on the browser.
Reference required to assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' containing the base class 'System.Web.UI.ScriptManager'. Add one to your project.
So in order to resolve this problem, I opened the web.config configuration file and paste the following code between the
assemblies tags in the compilation tags of the aspx configuration file.
<add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
And of course I had to go one more step and handle the
httpHandlers section as described in the post
'Sys' is undefined. and 'Type' is undefined. Javascript error messages with ASP.NET AjaxControlToolkit