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ASP.NET(AJAX+JSON)實(shí)現(xiàn)對(duì)象調(diào)用

更新時(shí)間：2010年01月13日 23:22:58 作者：

最近開始學(xué)習(xí)ASP.NET AJAX 搞了兩天學(xué)了點(diǎn)皮毛,貼點(diǎn)代碼日后方便自己查看.

客戶端:

 
<%@ 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發(fā)送對(duì)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 /> 
用戶名:<input id="TxtNum1" type="text" /> 
<br /> 
服務(wù)器:<input id="TxtRegister" type="text" /><br /> 
<button id="SumBtn" type="button" onclick="CallServer()">登錄</button> 
</div> 
</form> 
</body> 
</html> 

服務(wù)器:

復(fù)制代碼代碼如下:

 
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) 
{ 
//回調(diào)GetRegister方法 
string CallBackFun = Page.ClientScript.GetCallbackEventReference(this,"arg","GetRegister","context"); 
//創(chuàng)建ServerSum方法,在客戶端調(diào)用的時(shí)候就,會(huì)回調(diào)GetRegister方法,把參數(shù)傳給RaiseCallbackEvent(string eventArgument ),最后通過 
//GetCallbackResult()方法把返回值傳給客戶端 
string RegisterFun = string.Format("function ServerSum(arg,context){{{0};}}",CallBackFun); 
Page.ClientScript.RegisterClientScriptBlock(this.GetType(),"ServerSum",RegisterFun,true); 
} 
string mssage = string.Empty; 
#region ICallbackEventHandler 成員 
public string GetCallbackResult() 
{ 
return "服務(wù)器:你好,你的用戶名為:" + u.Name + "你的年齡為" + u.Age; 
} 
public void RaiseCallbackEvent(string eventArgument) 
{ 
JavaScriptSerializer js = new JavaScriptSerializer(); 
u =js.Deserialize<Users>(eventArgument); 
} 
#endregion 
} 

Users類

復(fù)制代碼代碼如下:

 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
/// <summary> 
///User 的摘要說明 
/// </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向服務(wù)器發(fā)送一個(gè)對(duì)象,服務(wù)器通過實(shí)現(xiàn) ICallbackEventHandler接口后,重寫GetCallbackResult和RaiseCallbackEvent方法,在回調(diào)的時(shí)候,在RaiseCallbackEvent方法
中反序列化JSON,并在GetCallbackResult把結(jié)果返回給客戶端.具體的我以后有空再補(bǔ)充,歡迎大家討論!