XMLHttpRequest的POST方式发送

来源：互联网发布：php 分享到朋友圈代码编辑：程序博客网时间：2024/05/21 20:21

注意：在HTML代码中一定要有xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;"); //用POST的时候一定要有这句,用GET的时候可以不用这句
我再补充一点，用XMLHttpRequest想后台发送的时候，是没有什么Page.IsPostBack的，即他总是认为是第一次加载。

Default.asp

<%@ 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">

<!--

var xmlhttp;

function Button1_onclick()

{

var dzb = "info={'FullName':'王继军','Company':'上海天正','Address':'田林路388号'}";

//"Departments":["总经理室","酒店事业部","市场销售部","金融事业部"]

send(dzb);

}

function send(arg)

{

CreateXMLHttpRequest();

xmlhttp.onreadystatechange = callhandle;

//xmlhttp.open("GET","Default.aspx?goback=yes&arg=" + arg,true);

xmlhttp.open("POST","Default.aspx?goback=yes",true);

xmlhttp.setRequestHeader("Content-Length",arg.lenght);

xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;"); //用POST的时候一定要有这句

xmlhttp.send(arg);

}

function CreateXMLHttpRequest()

{

if (window.ActiveXObject)

{

xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

}

else if (window.XMLHttpRequest)

{

xmlhttp = new XMLHttpRequest();

}

function callhandle()

{

if (xmlhttp.readyState == 4)

{

if(xmlhttp.status == 200)

{

var dzb = eval("(" + xmlhttp.responseText +")");

alert(dzb.Address);

}

// -->

</script>

</head>

<body>

<div>

<br />

</form>

</body>

</html>

Default.aspx.cs

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using Newtonsoft.Json;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

System.IO.StreamReader red = new System.IO.StreamReader(Request.InputStream, System.Text.Encoding.UTF8);/*有可能是gb2312*/

string ss = red.ReadToEnd();

try

{

if (Request.QueryString.Keys.Count == 0)

return;

if (Request.QueryString["goback"].ToString() == "yes")

{

AddressBook dbs = (AddressBook)JavaScriptConvert.DeserializeObject(Request.Form["info"].ToString(), typeof(AddressBook));

dbs.Address = "haha";

string output = JavaScriptConvert.SerializeObject(dbs);

Response.Write(output);

Response.Flush();

Response.Close();

}

catch(Exception ex)

{

System.Console.Write(ex.Message);

}

public class AddressBook

{

string _fullName = "wjj";

string _company = "tianzheng";

string _address = "田林路";

public string FullName

{

get { return _fullName; }

set { _fullName = value; }

}

public string Company

{

get { return _company; }

set { _company = value; }

}

public string Address

{

get { return _address; }

set { _address = value; }

}