Here is how this issue can be worked around: void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e) { ((RadMultiColumnComboBoxElement)e.ActiveEditor).AutoSizeDropDownToBestFit = true; ((RadMultiColumnComboBoxElement)e.ActiveEditor).DropDownAnimationEnabled = false; }
Please also note that if there are more items than the MaxDropDownItems in the list being displayed and the selected item in the list is outside of the initial displayed list, the selected item is not showed. i.e. MultiColumnCombobox Countries with 25 Coun