dropdowncheckboxes saplin controls inside gridview

Question

Hello Everyone, I am new to this programing Language..want to ask if how to call the ID of dropdowncheckboxes inside gridview in code behind??

heres my code:

<asp:GridView ID="sampleGrid" runat="server"
             OnRowDataBound="sampleGrid_RowDataBound">
             <Columns>
                <asp:TemplateField>
                   <ItemTemplate>
                        <asp:DropDownCheckBoxes runat="server" ID="ddcRoleGrid"
                        AddJQueryReference="True" UseButtons="True" UseSelectAllNode="True">
                        <Style2 SelectBoxWidth="300" DropDownBoxBoxWidth="200" DropDownBoxBoxHeight="80" /> 
                        <Texts SelectBoxCaption="Sample"/>
                        </asp:DropDownCheckBoxes>
                   </ItemTemplate>
                </asp:TemplateField>
            </Columns>
         </asp:GridView>


PLEASE HELP ME! THANKS A LOT