ajax post get

1.Ajax post 方法

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AJAXtest.aspx.cs" Inherits="treeview.AJAXtest" %>

<!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 id="Head1" runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>Ajax实例1</title>
    <script src="js/jquery-1.4.4.min.js"></script>
    <script type="text/javascript">
        $(function () {
            $("#btn1").click(function () {
                var txtparam1 = $("#txtParam1").val();
                var txtparam2 = $("#txtParam2").val();

                $.ajax({
                    url: "RepeatName.ashx",//发送到本页面后台AjaxMethod方法     "AJAXtest.aspx/AjaxMethod"
                    type: "POST",
                    dataType: "json",//返回格式必须是json格式，否则会进error方法，如果去掉可以接受任意的格式数据。
　　　　　　　　　　　　//后台如果传自定义类 的数据 该如何接收？ 后台需要用newtonsoft把类转换成json数据 返回。然后前端在success里直接 data.id即可。
                    async: true,//async翻译为异步的，false表示同步，会等待执行完成，true为异步
                    contentType: "application/json; charset=utf-8",//不可少
                    data: "{param1:'" + txtparam1 + "',param2:'" + txtparam2 + "'}",
                    success: function (data) {
                        $("#result").html(data.d);
                    },
                    error: function () {
                        alert("请求出错处理");
                    }
                });

            });
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
        参数1：<input type="text" id="txtParam1" value="" /><br />
        参数2：<input type="text" id="txtParam2" value="" /><br />
        <input type="button" id="btn1" value="提交"/><br />
        <div id="result"></div>
    </form>
</body>
</html>

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

namespace treeview
{
    public partial class AJAXtest : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            int dfe = 23;
        }

        //type方式必须是post，方法必须是静态的，方法声明要加上特性[System.Web.Services.WebMethod()]，传递的参数个数也应该和方法的参数相同。
        [System.Web.Services.WebMethod()]
        public static string AjaxMethod(string param1, string param2)
        {
            return "1参数为：" + param1 + "，2参数为：" + param2;
        }

    }
}

2. Ajax get

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ajaxGet.aspx.cs" Inherits="treeview.ajaxGet" %>

<!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 id="Head1" runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>Ajax实例1</title>
    <script src="js/jquery-1.4.4.min.js"></script>
    <script language="Javascript">
        function RepeatName() {
            var name = $("#txtLoginName").val();
            $.ajax({
                type: "GET",
                url: "RepeatName.ashx",
                data: "name=" + name, //如果这里是传多个参数的话 可以写成 date: "name="+name+"&"+"其它的名字="+页面获取的val();
                cache: false,
                async: false,
                success: function (data) {
     
                    if (data == "1") {
                        alert("此用户已经注册");
                    }
                    else{
                        alert("没有注册");
                    }
                },
                error: function () {
                    alert("请求出错处理");
                }
            });
        }
    </script>
</head>
<body>
    <div>
        <input type="text" name="txtLoginName" id="txtLoginName" onblur="return RepeatName()" />
        <span style="color: red; font-size: 13px" id="txtLoginNamespan"> </span>
    </div>
</body>
</html>

using System;
using System.Collections;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;

namespace treeview
{
    /// <summary>
    /// $codebehindclassname$ 的摘要说明
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class RepeatName : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");

            string name = context.Request.QueryString["param1"];
            if (name == "123")
            {
                context.Response.Write("1");
            }
            else
            {
                context.Response.Write("Hello World");
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}