Grid Editing - Cascading Combo Boxes

In this demo, the City column's combo box is populated dynamically (via callbacks) with city names, depending upon the country selected within the Country column's combo box. Note that only the City combo box' content is updated during round-trips to the server - not the content of the entire page or ASPxGridView control.

The Country combo box' SelectedIndexChanged client-side event is handled to send a request for updating the City combo box. On the server side the Callback event is handled to populate the City combo box with required items.