---
title: "[How Do I:] Use the ASP.NET AJAX CascadingDropDown Control Extender? | Microsoft Docs"
author: JoeStagner
description: "This video demonstrates how ASP.NET's standard DropDownList can become AJAX-enabled using the CascadingDropDown control extender from the ASP.NET AJAX Contro..."
ms.author: aspnetcontent
manager: wpickett
ms.date: 01/24/2007
ms.topic: article
ms.assetid: 7dca3704-474b-4b0b-8294-5599279964d9
ms.technology: dotnet-webforms
ms.prod: .net-framework
msc.legacyurl: /web-forms/videos/ajax-control-toolkit/how-do-i-use-the-aspnet-ajax-cascadingdropdown-control-extender
msc.type: video
---
[How Do I:] Use the ASP.NET AJAX CascadingDropDown Control Extender?
====================
by [Joe Stagner](https://github.com/JoeStagner)

This video demonstrates how ASP.NET's standard DropDownList can become AJAX-enabled using the CascadingDropDown control extender from the ASP.NET AJAX Control Toolkit. You will also see how easy it is for a web form to draw its data from an XML Web Service.

[▶ Watch video (27 minutes)](https://channel9.msdn.com/Blogs/ASP-NET-Site-Videos/how-do-i-use-the-aspnet-ajax-cascadingdropdown-control-extender)

>[!div class="step-by-step"]
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[Next](how-do-i-use-the-aspnet-ajax-textboxwatermark-control-extender.md)