I have a RadGrid in a form which contains 2 Combobox columns named "ITEMNAME" and "BATCHNO" respectively. I have loaded the first column with values from database. I need to populate the second combobox with values based on the value I choose from the first combobox. Which is the apt event to populate the values in a combo box based on another. If possible post a sample code. That would be useful to me.