Since there is no footer template in RadGrid, you can set the ShowFooter property of the grid to true and handle the OnItemCreated event, where you can get reference to the GridFooterItem and add RadComboBox controls within the cells of the footer:
sender, GridItemEventArgs e)
GridFooterItem footer = e.Item
i = 2; i < footer.Cells.Count; i++)
TableCell cell = footer.Cells[i];
RadComboBox combo =
For providing the data, you will have to handle the server-side OnPreRender event of the grid, get reference to each of the RadComboBox controls and manually provide the data to the control.
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