前端代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>        
     
    
      
    
       
    
           
      
    
      
    
      
    
      
拥有相同属性的na组
        
              
              
              
              通过按钮来测试选中什么动物
      
    
          
              
      
    
      
    请输入0-120的任意数字:    
              
      
      
        
      
      
        
              
              
              
              
      
        
      
        
      
               谁最能吃
       
       
            
                   
                   
                   
                   
       
             
       
            
       
        
            
       
               
      
    
     

　　

后端代码:

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class Default2 : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {    }    protected void Button1_Click(object sender, EventArgs e)    {        int s = 0;        for (int i = 1; i <= 10; i++)        {            s += i;        }        Response.Write("1到10的和为" + s.ToString());    }    protected void Button2_Click(object sender, EventArgs e)    {        if (Rn1.Checked) {TextBox1.Text = "你选中了："+Rn1.Text;}        if (Rn2.Checked) {TextBox1.Text = "你选中了："+Rn2.Text;}        if (Rn3.Checked) {TextBox1.Text = "你选中了："+Rn3.Text;}        if (Rn4.Checked) { TextBox1.Text = "你选中了：" + Rn4.Text; }    }    protected void Button3_Click(object sender, EventArgs e)    {        //将文本框的值转化成 浮点型        double num = -1;        //每次运行之前要清空所选中的文本框        Label1.Text = "";        Ran1.Checked = false;        Ran2.Checked = false;        Ran3.Checked = false;        Ran4.Checked = false;        //先将文本框的值 转换成浮点型，再将其赋值给num，        //因为num事先已经是-1了，        try{num = double.Parse(TextBox2.Text);}       catch {}        if (num < 0 || num > 120) {            Label1.Text = "请输入正确的数字";        }        else{        if(num<60){Ran1.Checked = true;}             if(num>60&&num<80){Ran2.Checked = true;}             if(num>80&&num<100){Ran3.Checked = true;}             if(num>100&&num<120){Ran4.Checked = true;}        }    }    protected void rr1(object sender, EventArgs e)    {        if (R1.Checked == true)        { Label2.Text = "你选择了" + R1.Text; }    }    protected void rr2(object sender, EventArgs e)    {        if (R2.Checked == true)        { Label2.Text = "你选择了" + R2.Text; }    }    protected void rr3(object sender, EventArgs e)    {        if (R3.Checked == true)        { Label2.Text = "你选择了" + R3.Text; }    }    protected void rr4(object sender, EventArgs e)    {        if (R4.Checked == true)        { Label2.Text = "你选择了" + R4.Text; }    }      protected void Button_Click(object sender, EventArgs e)    {        if (R1.Checked == false && R2.Checked == false && R3.Checked == false && R4.Checked == false)        { Response.Write(""); }        else if (R2.Checked)        { Response.Write(""); }        else {            Response.Write("");        }    }}