最近开始学习ASP.NET AJAX 搞了两天学了点皮毛,贴点代码 日后方便自己查看
客户端:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ASP.NETA_JAX.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>
<script type="text/jscript">
function CallServer() {
//JSON发送对象
ServerSum("{name:'linyijia',age:'21'}");
}
function GetRegister(rg, contex) {
document.getElementById("TxtRegister").value=rg;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<br />
用户名:<input id="TxtNum1" type="text" />
<br />
服务器:<input id="TxtRegister" type="text" /><br />
<button id="SumBtn" type="button" onclick="CallServer()">登录</button>
</div>
</form>
</body>
</html>
服务器:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Script.Serialization;
public partial class _Default : System.Web.UI.Page ,ICallbackEventHandler
{
Users u = null;
protected void Page_Load(object sender, EventArgs e)
{
//回调GetRegister方法
string CallBackFun = Page.ClientScript.GetCallbackEventReference(this,"arg","GetRegister","context");
//创建ServerSum方法,在客户端调用的时候就,会回调GetRegister方法,把参数传给RaiseCallbackEvent(string eventArgument ),最后通过
//GetCallbackResult()方法把返回值传给客户端
string RegisterFun = string.Format("function ServerSum(arg,context){{{0};}}",CallBackFun);
Page.ClientScript.RegisterClientScriptBlock(this.GetType(),"ServerSum",RegisterFun,true);
}
string mssage = string.Empty;
#region ICallbackEventHandler 成员
public string GetCallbackResult()
{
return "服务器:你好,你的用户名为:" + u.Name + "你的年龄为" + u.Age;
}
public void RaiseCallbackEvent(string eventArgument)
{
JavaScriptSerializer js = new JavaScriptSerializer();
u =js.Deserialize<Users>(eventArgument);
}
#endregion
}
Users类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
/// <summary>
///User 的摘要说明
/// </summary>
public class Users
{
string name;
public string Name
{
get { return name; }
set { name = value; }
}
string age;
public string Age
{
get { return age; }
set { age = value; }
}
}
原理:
使用JSON向服务器发送一个对象,服务器通过实现 ICallbackEventHandler接口后,重写GetCallbackResult和RaiseCallbackEvent方法,在回调的时候,在RaiseCallbackEvent方法
中反序列化JSON,并在GetCallbackResult把结果返回给客户端.具体的我以后有空再补充,欢迎大家讨论!