Update Panel updates

I have a ASP.NET AJAX Autocomplete Textbox and Two other dropdownlist in a Update Panel. On selection of an item in Autocomplete Textbox, I want开发者_开发百科 to populate Dropdown list from Database.

any idea how to achive this?

Thanx Vks

For this particular application, I suggest that you use a ASP.NET AJAX ComboBox instead of the Autocomplete Textbox.
With the ComboBox, it will be easier to trigger an async postback for your updatepanel and then bind the Dropdown list to the Database.