我有一个radiobuttonlist 里面有a b c d四个选项 我还有个按钮，我想点击一下按钮就记录我选的是哪个答案，最后判断每一个的对错

Question

string result = "";
foreach(ListItem li in this.RadioButtonList1.Items)
{
if(li.Selected)
{
result = li.Text;
Label.Text = "提示：你選擇的答案是" + result;
}
}
if(result != "")
{
if(result == "正確答案")
{
Label.Text = "提示：正確";
}
else
{
Label.Text = "提示：錯誤";
}
}
else
{
Label.Text = "提示：你沒有選擇答案";
}
隨手寫的。

Answer 1

 protected void Button1_Click(object sender, EventArgs e)
        {
           
            foreach (DataListItem item in DataList1.Items)
            {
                RadioButtonList rbl2 = (RadioButtonList)item.FindControl("RadioButtonList1");
                if (rbl2.SelectedIndex != -1)
                {
this.HiddenField1.Value = rbl2.SelectedValue.ToString();
      }                else
                {
                    Response.Write("<script>alert('对不起,请选择答案!')</script>");
                    return;
                }
            }
  int i = (int)ViewState["Scount"];
                        i ++;
                        ViewState["Scount"] = i;
                        SqlConnection mycon = new SqlConnection("Server=(local);Database=takeawaylanguages;UID=sa;Password=sa123");
                        mycon.Open();
                        string str = "select * from exam where examid=" + this.PartId + " and id=" +ViewState["Scount"] + "";
                        SqlCommand mycmd = new SqlCommand(str, mycon);
                        SqlDataReader reader;
                        reader = mycmd.ExecuteReader();
                       
                       
              if(reader.HasRows)
              {
                    Response.Write(HiddenField1.Value);
                   
                            DataList1.DataSource = reader;
                            DataList1.DataBind();
                           // mycon.Close();
                }
                      
                        else
                        {
                          
                            Response.Write(bid);
                            DataList1.Visible = false;
                            Button1.Visible = false;                            Panel1.Visible = true;
                        }
}
我想在这个单击事件中判断 把答案要绑定到一个DATALIST中用来显示正确答案和已选的答案