radio button in repeater?

Question

i have nasted repeater which repeate a radio button for each questions i need make only 1 radio button in each queations this is my code , how i can make group for radio button control ?

<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound" OnItemCommand="Repeater1_ItemCommand">
    <ItemTemplate>
        <div class="text-left" >
            <strong>

                <div>
                    <strong>
                        <li>
                             <div id="outer" style="background-color: lightblue">  <%# Eval("QuetionText")%></div>
                           <br />

                        </li>
                        <div>

                        <asp:Repeater ID="Repeater2" runat="server">
                            <ItemTemplate>
                                <li>

                                <div >
                                     <asp:RadioButton ID="RadioButton1" runat="server"  Text ='<%# Eval("ExamQuestionAnswerText")%>'  ></asp:RadioButton>
                                    <%--<asp:CheckBox ID="CheckBox1" runat="server" Text= '<%# Eval("ExamQuestionAnswerText")%>' />--%>

                                </div>
                                    </li>
                            </ItemTemplate>
                            <FooterTemplate >

                            </FooterTemplate>
                        </asp:Repeater>
                            </div>
                    </strong>
                </div>


            </strong>
        </div>
    </ItemTemplate>

</asp:Repeater>

Answer 1

You can group your radio buttons in child repeater by binding its property GroupName like:

  <asp:RadioButton ID="RadioButton1" runat="server"  Text ='<%# Eval("ExamQuestionAnswerText")%>'  
GroupName='<%# Eval("QuestionId")%>'></asp:RadioButton>

You need to bring QuestionId for dataSource of child repeater.