typing dropdownlist

I want to create a dropdownlist but user can type on it. Then I want to use typed-text to filter data that I already filled dropdownlist with. I want to design it as开发者_运维知识库 new control. How can I do?

thank you

You can also look at this.. http://www.asp.net/ajax/ajaxcontroltoolkit/samples/combobox/combobox.aspx

[Update the link above is dead so here is the latest one] https://ajaxcontroltoolkit.codeplex.com/wikipage?title=ComboBox%20Control

ASP does not have a Editable dropdownlist. There are many available on internet have a look at

1. http://authors.aspalliance.com/dotnetsolutions/Article2tmpl.aspx
2. http://www.codeproject.com/KB/aspnet/EditableDropdown.aspx