title: Looking for a filtered dropdown list for ASP.NET
body: <p>I have some DropDownList controls where the list is very large, so I would like to have a means for the user to filter the list, either based on other fields, e.g. region, or on the first letters typed in a textbox.  How can I achieve this in ASP.NET?  Is the an open source control out there that will help me?</p>