GridView - Batch Editing - How to use external buttons to update data and enable them only when a row/cell has been changed

This example demonstrates how to create external Update and Cancel buttons for GridView, and enable them only when an end-user edits a cell or a row.

See Also:
GridView - Batch Editing - How to show save and cancel buttons only when any row/cell has been changed
ASP.NET WebForms example:
ASPxGridView - Batch Editing - How to use external buttons to update data and enable them only when a row/cell has been changed