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 webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test4_5.WebForm1" %>
           
   
    
    
        
                 
      
       A 1+1=2
                  
      
       B 1+1=3
                  
      
       C 1+1=4
                  
      
       D 1+1=1
              
             
     
        
         
    
    
   

webform.aspx.cs

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace test4_5{    public partial class WebForm1 : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {        }        protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)        {            Label1.Visible = true;            if (int.Parse(RadioButtonList1.SelectedValue) == 0)            {                Label1.Text = "选择正确";            }            else            {                Label1.Text = "选择错误";            }        }    }}