asp.net ajax实现（—）：Jquery+Json
适合轻量级的应用，客户端序列化和反序列化可用Json的JSON.parse()和JSON.stringify(),
但服务端序列化和反序列化的时候，遇到一些问题，我采用了三种方式，其中三种方式序列化和反序列化的方式各有不同,比较请点这里看。
以下是我的操作的代码：
前台：
Code1
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">2
<html xmlns="http://www.w3.org/1999/xhtml" >3
<head runat="server">4
<title>无标题页</title>5
<script type="text/javascript" src="../JS/jquery-1.3.min.js"></script>6
<script type="text/javascript" src="../JS/json2.js"></script>7
<script type="text/javascript">
8
function GetValue()9
{10
$.get("Process.aspx", {Action:"get"}, function (data, textStatus){11
var name=$("#TName")[0];12
var address=$("#TAddress")[0];13
var age=$("#TAge")[0];14
var obj=JSON.parse(data);15
name.value=obj.Name;16
address.value=obj.Address;17
age.value=obj.Age;18
});19
}20
21
function SetValue()22
{23
var person=new Person($("#TName")[0].value,$("#TAddress")[0].value,$("#TAge")[0].value);24
var str=JSON.stringify(person);25
alert(str);26
$.post("Process.aspx", {Action:"post",JsonStr:""+ str +""}, function (data, textStatus){27
alert("发送成功");28
});29
}30
31
function Person(name,address)32
{33
this.Name=name;34
this.Address=address;35
}36
</script>37
</head>38
<body>39
<form id="form1" runat="server">40
<div>41
<table>42
<tr>43
<td>姓名：</td>44
<td><input type="text" id="TName" /></td>45
</tr>46
<tr>47
<td>住址：</td>48
<td><input type="text" id="TAddress"/></td>49
</tr>50
<tr>51
<td>年龄：</td>52
<td><input type="text" id="TAge" /></td>53
</tr>54
</table>55
<table>56
<tr>57
<td><input type="button" onclick="GetValue();" value="加载数据"></td>58
<td><input type="button" value="更新数据" onclick="SetValue()"></td>59
</tr>60
</table>61
</div>62
</form>63
</body>64
</html>后台：
Code1 using System;
2 using System.Collections;
3 using System.Configuration;
4 using System.Data;
5 using System.Linq;
6 using System.Web;
7 using System.Web.Security;
8 using System.Web.UI;
9 using System.Web.UI.HtmlControls;
10 using System.Web.UI.WebControls;
11 using System.Web.UI.WebControls.WebParts;
12 using System.Xml.Linq;
13 using System.Runtime.Serialization.Json;
14 using System.ServiceModel.Dispatcher;
15 using System.Text;
16 using System.Web.Script.Serialization;
17 using System.IO;
18 using System.Runtime.Serialization;
19 namespace WebDemo.AjaxTest
20 {
21 public partial class Process : System.Web.UI.Page
22 {
23 protected void Page_Load(object sender, EventArgs e)
24 {
25 if (!Request.Params.AllKeys.Contains("JsonStr"))
26 {
27 GetData();
28 }
29 else
30 {
31 LoadData();
32 }
33 }
34 /// <summary>
35 /// 从客户端加载数据
36 /// </summary>
37 private void LoadData()
38 {
39 string str = Request.Params["JsonStr"];
40 DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(Model.User));
41 MemoryStream ms=new MemoryStream(System.Text.Encoding.UTF8.GetBytes(str.ToCharArray()));
42 Model.User user = (Model.User)serializer.ReadObject(ms);
43 ms.Close();
44 }
45 /// <summary>
46 /// 向客户端发送数据
47 /// </summary>
48 private void GetData()
49 {
50 Model.User user = new Model.User();
51 user.Address = "上海市闵行区";
52 user.Age = 26;
53 user.Name = "Windstore";
54 string resultStr;
55 //方式一：System.Runtime.Serialization.Json Assembly:System.ServiceModel.Web
56 DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(Model.User));
57 MemoryStream stream = new MemoryStream();
58 serializer.WriteObject(stream, user);
59 stream.Position = 0;
60 StreamReader sr = new StreamReader(stream);
61 resultStr = sr.ReadToEnd();
62 sr.Close();
63 stream.Close();
64 //方式二：System.ServiceModel.Dispatcher.JsonQueryStringConverter Assembly:System.ServiceModel
65 //JsonQueryStringConverter convert = new JsonQueryStringConverter();
66 //resultStr = convert.ConvertValueToString(user, typeof(Model.User));
67 //方式三：System.Web.Script.Serialization
68 //StringBuilder sb = new StringBuilder();
69 //JavaScriptSerializer jsServilizer = new JavaScriptSerializer();
70 //jsServilizer.Serialize(user, sb);
71 //resultStr = sb.ToString();
72 Response.ContentType = "application/json";
73 Response.Write(resultStr);
74 Response.Flush();
75 Response.End();
76 }
77 }
78 }
79
Model类：
Code1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Runtime.Serialization;
6 namespace WebDemo.Model
7 {
8 /// <summary>
9 /// 用户实体
10 /// </summary>
11 [DataContract]
12 public class User
13 {
14 #region 私有字段
15 private string named;
16 private string addressd;
17 private int aged;
18 #endregion
19 #region 公共属性
20 /// <summary>
21 /// 姓名
22 /// </summary>
23 [DataMember]
24 public string Name
25 {
26 get { return named; }
27 set { named = value; }
28 }
29
30 /// <summary>
31 /// 家庭住址
32 /// </summary>
33 [DataMember]
34 public string Address
35 {
36 get { return addressd; }
37 set { addressd = value; }
38 }
39
40 /// <summary>
41 /// 年龄
42 /// </summary>
43 [DataMember]
44 public int Age
45 {
46 get { return aged; }
47 set { aged = value; }
48 }
49 #endregion
50 }
51 }
客户端用JSON.stringify()反序列化的时候，默认的值都是字符串类型的，如果想返回整型值，可以用 JSON.stringify(myObject, replacer);用回调函数replacer处理。
