ASPxGridView - How to customize RowFilter in DataDateColumn and provide two ASPxDateEdit controls that allow setting a date range as a filter expression

To achieve this goal, use GridViewColumn.FilterTemplate. Place two ASPxDateEdit controls and the "Apply" button inside the template. In the ASPxClientButton.Click event handler, create a filter expression and apply it to the grid via the ASPxClientGridView.ApplyFilter method. See the example for more details.