说明（2017-11-4 15:32:49）：
1. 回北京后又快一个月了，上次在家写的下回预告，到底是没把加水印写完，而且这次也不想写。。
2. 上次许的愿，十月份看完asp.net，已经泡汤了，翻了一下，一共十天的课程，我搞不好大半年就看了6天的。。
3. 总而言之，这次的笔记是用JavaScript的原生ajax操作，应该只是了解写法吧，因为下一讲就是jQuery封装好的ajax操作了。
Ajax_Get.aspx：
1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Ajax_Get.aspx.cs" Inherits="_06_Ajax.ajax" %> 2 ?3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 4 <html xmlns="http://www.w3.org/1999/xhtml"> 5 <head runat="server"> 6 ????<title></title> 7 </head> 8 <body> 9 ????<form id="form1" runat="server">10 ????<input type="button" name="name" value="显示用户" id="btnShow" />11 ????</form>12 </body>13 <script type="text/javascript">14 ????var btnShow = document.getElementById("btnShow");15 ????btnShow.onclick = function () {16 ????????var xhr;17 ????????if (XMLHttpRequest) {18 ????????????xhr = new XMLHttpRequest();19 ????????} else {20 ????????????xhr = new ActiveXObject("Microsoft.XMLHTTP");21 ????????}22 ????????//open里面放用户名和密码传值23 ????????xhr.open("get", "Ajax.ashx?userName=zhangsan&passWord=123", true);24 ????????xhr.send();25 ????????xhr.onreadystatechange = function () {26 ????????????if (xhr.readyState == 4 && xhr.status == 200) {27 ????????????????alert(xhr.responseText);28 ????????????}29 ????????};30 ????};31 </script>32 </html>Ajax_Post.aspx：
1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Ajax_Post.aspx.cs" Inherits="_06_Ajax.Ajax_Post1" %> 2 ?3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 4 <html xmlns="http://www.w3.org/1999/xhtml"> 5 <head runat="server"> 6 ????<title></title> 7 </head> 8 <body> 9 ????<form id="form1" runat="server">10 ????<input type="button" name="name" value="显示用户" id="btnShow" />11 ????</form>12 </body>13 <script type="text/javascript">14 ????var btnShow = document.getElementById("btnShow");15 ????btnShow.onclick = function () {16 ????????var xhr;17 ????????if (XMLHttpRequest) {18 ????????????xhr = new XMLHttpRequest();19 ????????} else {20 ????????????xhr = new ActiveXObject("Microsoft.XMLHTTP");21 ????????}22 ????????xhr.open("post", "Ajax.ashx", true);23 ????????//手动加head头，第一次没成功，因为x前面的斜杠写成横杠了24 ????????xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");25 ????????//send里放传的值26 ????????xhr.send("userName=lisi&passWord=456");27 ????????xhr.onreadystatechange = function () {28 ????????????if (xhr.readyState == 4 && xhr.status == 200) {29 ????????????????alert(xhr.responseText);30 ????????????}31 ????????};32 ????};33 ????34 35 </script>36 </html>Ajax.ashx：
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 ?6 namespace _06_Ajax 7 { 8 ????/// <summary> 9 ????/// ajax1 的摘要说明10 ????/// </summary>11 ????public class ajax1 : IHttpHandler12 ????{13 14 ????????public void ProcessRequest(HttpContext context)15 ????????{16 ????????????context.Response.ContentType = "text/plain";17 ????????????//string method = context.Request.HttpMethod();判断请求方式，get还是post18 ????????????//get和post都发送到这个ashx页面，反正都是接受用户名和密码19 ????????????string userName = context.Request["userName"];20 ????????????string passWord = context.Request["passWord"];21 ????????????context.Response.Write(userName + passWord);22 ????????}23 24 ????????public bool IsReusable25 ????????{26 ????????????get27 ????????????{28 ????????????????return false;29 ????????????}30 ????????}31 ????}32 }ASP.NET学习笔记（5）——原生Ajax基本操作
原文地址：http://www.cnblogs.com/Jacklovely/p/7783656.html