muthu arumugam blog

Sometimes, you will be migrating your application from a typical ASP.NET into the microsoft supported ASP.NET AJAX Web Extension along with AJAX Control Toolkit. I often get the same issue where i forget to add the httpHandlers and httpModules. Please visit this blog for a quick solution for this issues. It worked for me.

‘Sys’ is undefined

Or Look at the solution copied from there:

1. remove
   
   <%@ Register Assembly=”System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35″  
   
   Namespace=”System.Web.UI” TagPrefix=”asp” %>
   

2. Add below code  between <system.web> element in web.config<pages>< controls><add tagPrefix=“asp“ namespace=“System.Web.UI“ assembly=“System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35“/></ controls></pages>< compilation debug=“false“> <assemblies><add assembly=“System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35“/></assemblies></compilation>< httpHandlers><remove verb=“*“ path=“*.asmx“/><add verb=“*“ path=“*.asmx“ validate=“false“ type=“System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35“/><add verb=“GET,HEAD“ path=“ScriptResource.axd“ type=“System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35“ validate=“false“/></httpHandlers><httpModules><add name=“ScriptModule“ type=“System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35“/></httpModules></system.web>