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Vijay Kodali
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ListSearchExtender AJAX control

The ListSearchExtender lets you search for items in a ListBox or DropDownList by typing.  The extender performs an incremental search within the ListBox based on what has been typed so far.

the code is simple 

 <ajaxToolkit:ToolkitScriptManager ID="ScriptManager1" EnablePartialRendering="true" EnableScriptGlobalization="true" EnableScriptLocalization="true" runat="Server" />

ScriptManger is required for all AJAX controls..

 <ajaxToolkit:ListSearchExtender ID="ListSearchExtender1" runat="server" TargetControlID="ListBox1" PromptCssClass="ListSearchExtenderPrompt" PromptPosition="Top"></ajaxToolkit:ListSearchExtender/>

  • PromptText - Message to display when the ListBox is given focus. 
  • TargetControlID - Control to be searched
  • PromptPosition - Indicates whether the message should appear at the Top or Bottom of the ListBox.  The default is Top.

Categories: AJAX | ASP.NET
Posted by vijay on Saturday, August 18, 2007 6:09 PM
Permalink | Comments (2) | Post RSSRSS comment feed


morley Canada

Wednesday, October 22, 2008 5:42 PM


Hey How do I do this in Visual Studio 2008 with the ajax that is provided or do I have to download the version 1.0- and 2.0 of ajax first???
I keep getting this error Unable to create type ajaxToolkit:ListSearchExtender could load System.Web.Extensions Version 1.0... or one of it's dependencies. -- I have loaded System.Web.Extensions 3.5 but it is not working with the reference!!


Sunday, October 26, 2008 10:33 PM


May be you are missing a Refernce to AJAX dll

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