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Home > Search > Articles & Samples > AJAX > AJAX Toolkit > CascadingDropDown
The Toolkit in action: Hooking up the CasdcadingDropDown        
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One of the things people regularly want to do is to create a "cascading" set of DropDownLists, where the value of each populates the values below. The "Atlas" Control Toolkit contains a great extender to make this super easy to set up. It does all of the population of the lists using an async call to a web service, which allows you to filter and cache the data on the server side and easily integrate it into your page. Go here to download and install the toolkit, and the Atlas April CTP if you don't already have it. Once you've got it installed, you can see demos of all the controls in the toolkit.

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