I have 2 radcombobox in the GridTemplateColumn, is it possible that when I choose an item in combox #1, it will cause combox#2 to refresh with a new set of data? I don't care if I accomplish this from serverside or clientside coding.
sorry, I would like to add these 2 combo box is in edittemplate. So just to add:
1. user click on the "edit" row
2. edittemplate open up with multiple textbox and combo box in it
3. combobox #1 gets an item selected
4. combobox #2 data content changes according to what they selected in combobox #1.
You can take a look at this demo on ComboBox - Related ComboBoxes which shows your required scenario . You can try similar approach for the RadComboBox in the EditItemTemplate. Please try and let me know if any concern.