<
telerik:RadGridView Name="UserListGrid" DockPanel.Dock="Top" Height="520"
ScrollMode="RealTime"
UseAlternateRowStyle="True"
AutoGenerateColumns="False"
ShowGroupPanel="False"
IsReadOnly="False"
RowIndicatorVisibility ="Visible"
CanUserFreezeColumns="False"
SelectionMode="Single"
ItemsSource="{Binding OperatorInfoItems, Mode=TwoWay}"
SelectedItem="{Binding SelectedRow, Mode=TwoWay}"
IsSynchronizedWithCurrentItem="True"
SelectionChanged="UserListGrid_SelectionChanged">
<telerik:RadGridView.Columns>
<telerik:GridViewDataColumn UniqueName="Cars" DataType="{x:Null}" Header="Names" IsVisible="True" IsFilterable="False" IsGroupable="False" IsReadOnly="True" IsSortable="False" Width="150"/>
<telerik:GridViewComboBoxColumn ItemsSource="{Binding Parts}" Header="Parts"/>
</telerik:RadGridView.Columns>
</telerik:RadGridView>
But after running the project i could only see names and a data binding error message instead of a populated combobox.
Pl tell me what to do.

this.OfficesDataSource = new List<OfficeName>();OfficeName o;EmployeeName e;this.OfficesDataSource.Add(o = new OfficeName("A")); o.EmployeeNames.Add(e = new EmployeeName("X")); o.EmployeeNames.Add(new EmployeeName("Y")); this.OfficesDataSource.Add(o = new OfficeName("B")); o.EmployeeNames.Add(new EmployeeName("Z")); this.DataContext = this.OfficesDataSource;