I have a scenario where I want to select a "State" from listbox A and have it dynamically update listbox B with related "Counties". My datasource would be SQL Server tables. What would be the most efficient way to program this using Ajax?
One suggestion is getting the ListItem in OnClientSelectedIndexChanged event of RadListBox and make a ajaxrequest and populate in the ajaxRequest event handler on the server. Here is the code that I tried.