I have successfully implemented the CascadingDropDown extender on three drop downs. What I need to is that when the value in the last drop down changes or refreshed to trigger an event which update a GridView control. I have the GridView in an UpdatePanel with the drop downs. I read one article about how to add a OnPopulated method to the CascadingDropDown control but this only call a javascript method when the data is populated. I am not sure how gather data from a web service call and update the GridView from a javascript method or that would be the solution. Any help would be appreciated, Thanks!
<asp:UpdatePanel ID="myUpdatePanel" runat="server">
<ContentTemplate>
<table border="0" cellspacing="0" cellpadding=Go to the complete details ...