omplete Description

AutoComplete is an ASP.NET AJAX extender that can be attached to any TextBox control, and will associate that control with a popup panel to display words that begin with the prefix typed into the textbox.

The dropdown with candidate words supplied by a web service is positioned on the bottom left of the text box.

In the sample above, the textbox is associated with an AutoCompleteExtender that pulls words that start with the contents of the textbox using a web service.

When you have typed more content than the specified minimum word length, a popup will show words or phrases starting with that value. Caching is turned on, so typing the same prefix multiple times results in only one call to the web service.