Cascading Editors (Batch Editing)

The DevExpress ASP.NET Grid View control (ASPxGridView) allows you to incorporate cascading comboboxes, wherein a value selected within one combobox limits choices in the second combobox. This demo illustrates how to add cascading comboboxes in Batch Edit mode.

Implementation:

• In this demo, the "Country" column editor raises a SelectedIndexChanged event when a user selects a different country. We use the PerformCallback method for the “City” column editor and obtain cities that correspond to the selected country from the server.
• The grid uses a single instance of a column editor for all cells in this column. Before a user starts editing a value in the “City” column, you need to check and update items for the combobox editor. To update items, handle the ASPxGridView's client-side BatchEditStartEditing event and call the "City" combobox's PerformCallback method with the selected country.

  On the server, subscribe to the combobox's Callback event (within a CellEditorInitialize event handler). The Callback event receives the selected country from the client and populates the "City" combobox with corresponding items.