public ObservableCollection<ABC_Class> Avldata = new ObservableCollection<ABC_Class>();
Avldata.Add(new GrpClass() { A =1, B = 1, C = 1});
Avldata.Add(new GrpClass() { A =2, B = 2, C = 2});
Avldata.Add(new GrpClass() { A =3, B = 3, C = 3});
((GridViewComboBoxColumn)this.ABC.Columns["B"]).ItemsSource = GetOptions();
this.ABC.ItemsSource = Avldata.ToList();
<telerik:RadGridView Name="ABC"
AutoGenerateColumns="True" Grid.ColumnSpan="4" Grid.RowSpan="3"
ShowGroupPanel="False" EnableRowVirtualization="True" EnableColumnVirtualization="True" RowIndicatorVisibility="Collapsed" Margin="10,0,0,6" CellValidating="CellValidating" AddingNewDataItem="AddingNewDataItem" RowEditEnded="RowEditEnded" DataLoaded="Dataload" KeyDown="KeyDown" CellEditEnded="CellEditEnded" RenderTransformOrigin="0.5,0.5" Grid.Row="2" BeginningEdit="BeginningEdit" RowLoaded="RowLoaded" VerticalAlignment="Top" CanUserResizeColumns="False" CanUserReorderColumns="False" CanUserSortColumns="False" CanUserSortGroups="False" ColumnWidth="80" KeyboardNavigation.AcceptsReturn="True" MaxColumnWidth="150" MinColumnWidth="80" CanUserFreezeColumns="False" ContextMenuService.IsEnabled="False" IsFilteringAllowed="False" EnableLostFocusSelectedState="False" IsLocalizationLanguageRespected="False">
<telerik:RadGridView.Columns>
<telerik:GridViewComboBoxColumn UniqueName="B" DisplayMemberPath="Name" SelectedValueMemberPath="ID" DataMemberBinding="{Binding Option}" />
</telerik:RadGridView.Columns>
</telerik:RadGridView> I am trying to show combo box in Column "B" edit mode so user can select value from combo.but combo box appearing in column index "0".how to fix the problem .thanks