Telerik rad grid view

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C#

WPF

C#4.0

Hi
I have a telerik rad grid with 5 columns and am binding values using itemsource property .... Now i have added 2 image columns which has to updated .... How can i do this .

<telerik:RadGridView.Columns>

     <telerik:GridViewCheckBoxColumn Header="{loc:Translate}" loc:Translate.Uid="101" DataMemberBinding="{Binding Enrolled}" IsReadOnly="False" AutoSelectOnEdit="True" EditTriggers="CurrentCellClick" HeaderCellStyle="{StaticResource headerCellAgeStyle}"/>
     <telerik:GridViewImageColumn Header="{loc:Translate}" Name="imgColumn1" loc:Translate.Uid="222" IsReadOnly="True" HeaderCellStyle="{StaticResource headerCellAgeStyle}"></telerik:GridViewImageColumn>
     <telerik:GridViewImageColumn Header="{loc:Translate}" Name="imgColumn2" loc:Translate.Uid="223" DataMemberBinding="{Binding JBYimg}" IsReadOnly="True" HeaderCellStyle="{StaticResource headerCellAgeStyle}"></telerik:GridViewImageColumn>
     <telerik:GridViewDataColumn Header="{loc:Translate}" loc:Translate.Uid="102" DataMemberBinding="{Binding MemberName}" Width="180" IsReadOnly="True" HeaderCellStyle="{StaticResource headerCellAgeStyle}">

     </telerik:GridViewDataColumn>

     <telerik:GridViewDataColumn Header="{loc:Translate}" loc:Translate.Uid="103" Width="100" IsReadOnly="True" HeaderCellStyle="{StaticResource headerCellAgeStyle}">
         <telerik:GridViewDataColumn.CellTemplate>
             <DataTemplate>
                 <TextBlock Text="{Binding Gender,Mode=TwoWay}"/>
             </DataTemplate>
         </telerik:GridViewDataColumn.CellTemplate>

     </telerik:GridViewDataColumn>
     <dtpic:DateTimePickerColumn HeaderCellStyle="{StaticResource headerCellAgeStyle}" IsReadOnly="True" Header="{loc:Translate}" loc:Translate.Uid="179" Width="100" DataMemberBinding="{Binding DateOfBirth,Mode=TwoWay}" DataFormatString="{}{0:dd/MM/yyyy}"/>

     <telerik:GridViewDataColumn HeaderCellStyle="{StaticResource headerCellAgeStyle}" IsReadOnly="True" Header="{loc:Translate}" loc:Translate.Uid="104" DataMemberBinding="{Binding Age,StringFormat=\{0:n0\},ValidatesOnDataErrors=True}" Width="60"/>
     <telerik:GridViewDataColumn HeaderCellStyle="{StaticResource headerCellAgeStyle}" IsReadOnly="True" Header="{loc:Translate}" loc:Translate.Uid="105" Width="100">
         <telerik:GridViewDataColumn.CellTemplate>
             <DataTemplate>
                 <TextBlock Text="{Binding Path=RelationCode,Converter={StaticResource GetDepRelName}}"/>
             </DataTemplate>
         </telerik:GridViewDataColumn.CellTemplate>

     </telerik:GridViewDataColumn>
     <telerik:GridViewDataColumn HeaderCellStyle="{StaticResource headerCellAgeStyle}" IsReadOnly="True" Width="110" Header="{loc:Translate}" loc:Translate.Uid="180" DataMemberBinding="{Binding Path=UIDNumber,ValidatesOnDataErrors=True,ValidatesOnExceptions=True}"/>

 </telerik:RadGridView.Columns>

And my code behind is as follows .....

CrossCutting.GlobalVariable.GDepcoll = new ObservableCollection<Dependent>();
raddtgFamDetails.ItemsSource = CrossCutting.GlobalVariable.GDepcoll;