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Cascading Combo Boxes

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The DevExpress ASP.NET Autocomplete Combo Box (ASPxComboBox) control allows content (the item list) to be updated via callbacks using the PerformCallback client method. In this demo, the 'City' combo box is populated on the fly with city names that correspond to the currently selected country from the 'Country' combo box.

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Local Copy of this Demo
To inspect the source code for this demo on your machine, you must first install our components via the DevExpress Component Installer.
You can open a local copy of this online demo directly from this webpage (if using v20.2.8, 21.1.4 or higher).
Open CS Solution
Open VB Solution
The source code files for this demo are installed (by default) in the following directories:
\Users\Public\Documents\DevExpress Demos XX.X\Components\ASP.NET\CS\ASPxEditorsDemos
\Users\Public\Documents\DevExpress Demos XX.X\Components\ASP.NET\VB\ASPxEditorsDemos