前端代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2>求连续数字的和</h2>
<hr/>
输入的起始数值：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br/>
输入的结束数值：<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<br/>
<asp:Button ID="Button" runat="server" Text="求和" οnclick="Button_Click" />
<br/>
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</div>
</form>
</body>
</html>
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 _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button_Click(object sender, EventArgs e)
{
int InStart=0;
int InEnd = 0;
int Sum =0;
InStart = int.Parse(TextBox1.Text);
InEnd = int.Parse(TextBox2.Text);
while(InStart<=InEnd)
{
Sum +=InStart;
InStart++;
}
Label1.Text = Sum.ToString();
}
}