Visual Studio 2005 + AjaxToolkit

Question

Hello,

I have an ASP.NET Web application. I am building it with Visual Studio 2005. One of my user controls requires the AJAX Control Toolkit. For some reason though, my project will not build. However, I have referenced the AjaxControlToolkit assembly. It is appearing in the project references.

Does anyone have any ideas as to why this application will not build?

Thank you!

Answer 1

The UpdatePanel is part of System.Web.Extensions.dll and does not need to be explicitly added to the bin folder of the project as it gets installed into the GAC (global assembly cache).

See the ASP.NET AJAX documentation for more information. The ASP.NET 2.0 AJAX Extensions 1.0 msi can be downloaded here.

(I'll leave the rest of the answer here as it may prove useful for someone else)

---

It sounds like the AJAX Control Toolkit is not referenced in the page. Make sure you have

using AjaxControlToolkit;

in the code-behind.

Also, you might want to add this to the web.config

<pages>
  <controls>
    <add tagPrefix="ajaxToolkit" namespace="AjaxControlToolkit" assembly="AjaxControlToolkit"/>
  </controls>
</pages>

This specifies the tag prefix for the AJAX Control Toolkit controls when used in the aspx markup.