如何在ASP.NET转发器中获取ASP.NET单选按钮的值

我在网络应用程序中使用asp.net转发器，因为我有四个单选按钮，并且还将数据从数据库提取到转发器和单选按钮。实际上我的问题是我正在设计在线考试网站，我从数据库中获取问题和选项，但只有在提交表格时才考虑第一个问题，但是当涉及到第二个问题时，它只对第二个问题提出第一个问题，等等。如何解决这个问题...请建议我在哪里做错了。



我尝试了什么：

I am using asp.net repeater in the web application in that i am having four radio buttons and also fetching the data from the database to the repeater and radio buttons as well. Actual my problem is I am designing online examination site for which i am getting questions and options from the database but only thing when submitting the form it is considering first question fine but when comes to second question it is taking only first questions to second question and so on. How to solve this problem... Please suggest me where i am doing wrong.

What I have tried:

<div>
    <asp:Repeater ID="QuestionRepeater" runat="server">
        <HeaderTemplate>
            <table>
                <tr>
                    <td>Online Examination</td>
                </tr>
        </HeaderTemplate>
        <SeparatorTemplate>
                <tr>
                    <td>
                        <br />
                    </td>
                </tr>
        </SeparatorTemplate>
        <ItemTemplate>
                <tr>
                    <td>
                        <%#Eval("QuestionNumber") %>
                        <%#Eval("Question") %>
                    </td>
                </tr>
                <tr>
                    <td>
                        <asp:RadioButton runat="server" ID="rb1" GroupName="Rb_Choice" OnCheckedChanged="CheckChanged" Text='<%# Bind("ChoiceA") %>'></asp:RadioButton>
                    </td>
                    <td>
                        <asp:RadioButton runat="server" ID="rb2" GroupName="Rb_Choice" OnCheckedChanged="CheckChanged" Text='<%# Bind("ChoiceB") %>'></asp:RadioButton>
                    </td>
                </tr>
                <tr>
                    <td>
                        <asp:RadioButton runat="server" ID="rb3" GroupName="Rb_Choice" OnCheckedChanged="CheckChanged" Text='<%# Bind("ChoiceC") %>'></asp:RadioButton>
                    </td>
                    <td>
                        <asp:RadioButton runat="server" ID="rb4" GroupName="Rb_Choice" OnCheckedChanged="CheckChanged" Text='<%# Bind("ChoiceD") %>'></asp:RadioButton>
                    </td>
                 </tr>
        </ItemTemplate>
        <FooterTemplate>
            </table>
        </FooterTemplate>
    </asp:Repeater>
</div>

CodeBehind：

CodeBehind:

foreach (RepeaterItem rp in QuestionRepeater.Items)
{
    while (dr.Read())
    {
        if (rp.ItemType == ListItemType.Item || rp.ItemType == ListItemType.AlternatingItem)
        {
            a.QuestionNumber = Convert.ToInt32(dr["QuestionNumber"]);
            var rb1 = rp.FindControl("rb1") as RadioButton;
            var rb2 = rp.FindControl("rb2") as RadioButton;
            var rb3 = rp.FindControl("rb3") as RadioButton;
            var rb4 = rp.FindControl("rb4") as RadioButton;
        }
    }
}