ASP.NET AJAX: How Do I: Use the ASP.NET AJAX CascadingDropDown Control Extender?
This video demonstrates how ASP.NET's standard DropDownList can become AJAX-enabled using the CascadingDropDown control extender from the ASP.NET AJAX Control Toolkit. You will also see how easy it is for a web form to draw its data from an XML Web Service.
Presented by Joe Stagner
Date: 24 January 2007