首先看一下效果圖!

實作看一下頁面部分的代碼
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="TestAjax.WebForm1" %>
<!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>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="btnAjax" runat="server" Text="Ajax按鈕" onclick="btnAjax_Click" />
<br />
<asp:Label ID="lblshowAjax" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
</div>
<br/>
<asp:Button ID="btnButton" runat="server" Text="普通按鈕"
onclick="btnButton_Click" />
<p>
</p>
<p>
<asp:Label ID="lblShow" runat="server" Text="Label"></asp:Label>
</p>
</form>
</body>
</html>
看一下背景部分的代碼!!
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace TestAjax
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
lblshowAjax.Text = "Page_Load運作";
}
protected void btnAjax_Click(object sender, EventArgs e)
{
lblshowAjax.Text = "Ajax送出的資訊";
}
protected void btnButton_Click(object sender, EventArgs e)
{
lblShow.Text = "普通送出的資訊";
}
}
}