ExtJs
WebService Json序列化(扩展JavaScriptSerializer类)
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今天我们来探讨一下关于 使用JavaScriptSerializer的Serialize方法进行Json序列化.
在这里我们要用到反射,所以,对于反射也可以顺便学习一下.
注意,我这里是用Vs2008来编写的,所以Vs2008以前的版本,需要读者自己相应的改一下,~_~!
首先我们创建一个webapplication工程,
添加一个WebService.htm文件,
页面代码如下:
<!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> <title>无标题页</title> <script src="ExtJs/ext-base.js" type="text/javascript"></script> <script src="ExtJs/ext-all.js" type="text/javascript"></script></head><body> <input id="Button1" onclick="getValue();" type="button" value="返回" /> <textarea id="log" cols="40" rows="10"></textarea> 
<script type="text/javascript">
<!-- function getValue()
{
Ext.Ajax.request( { method:"post", url:"test.asmx/GetData", success:ExtSuccess, headers:{'Content-Type':'application/json;utf-8'}//在这里一定要指定头信息为json，否则将返回的是XML，而不是Json
} ) } function ExtSuccess(result,request) { var textArea = Ext.get('log').dom; textArea.value += result.responseText + " "; //Ext.MessageBox.alert('Success', 'Data return from the server: '+ result.responseText); doJSON(result.responseText); } function doJSON(stringData) { try { //这里可能麻烦一点，需要将返回的数据进行两次Json序列化 //第二次转化的对象是stringData.d, d是ExtJs内部定义的属性 var jsonData = Ext.util.JSON.decode(stringData); jsonData = Ext.util.JSON.decode(jsonData.d); for(var i in jsonData) { alert(i+":"+jsonData[i]); } } catch (err) { } } //--> 
</script></body></html>然后我们加入要引用的ext-base.js和ext-all.js两个ExtJs文件,这两个文件需要读者到www.extjs.com去下载.
接下来我们创建一个test.asmx文件,代码如下:
using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Linq;using System.Web;using System.Web.Services;using System.Web.Services.Protocols;using System.Xml.Linq;using System.Web.Script.Services;using System.Collections.Generic;using System.ServiceModel.Web;using System.ServiceModel.Dispatcher;using Component;namespace WebApplication1{ /// <summary> /// test 的摘要说明 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [ScriptService] [ToolboxItem(false)] // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。 public class test : System.Web.Services.WebService { [WebMethod] public string GetData() { var obj = new { obj = new[] { new { name = "a", id = 1 }, new { name = "b", id = 2 } } }; Dictionary<string, object> dic = new Dictionary<string, object>(); dic.Add("p1",1); dic.Add("p2",2); return obj.toJson(new { p1 = 1 }, new { p2 = 2 }); } }}接下来创建一个ExtendMethod.cs文件,存放Json序列化的扩展方法
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Web.Script.Serialization;using System.Collections;using System.Reflection;namespace Component{ public static class ExtendMethod { /// <summary> /// 返回Json序列 /// parms字典 /// Key:Json对象名 /// Value:Json对象值 /// </summary> /// <param name="This"></param> /// <param name="parms">需要加入的对象</param> /// <returns></returns> public static string toJson(this object This,Dictionary<string,object> parms) { JavaScriptSerializer json = new JavaScriptSerializer(); var ds = new { source=This}; Dictionary<object,object> dic = new Dictionary<object,object>(); dic.Add("source",This); foreach (KeyValuePair<string, object> key in parms) { dic.Add(key.Key,key.Value); } return json.Serialize(dic); } /// <summary> /// 返回Json序列 /// parms:加入的对象将与this对象同级 /// 未完成 /// </summary> /// <param name="This"></param> /// <param name="parms">需要加入的对象</param> /// <returns></returns> public static string toJson(this object This, params object[] parms) { JavaScriptSerializer json = new JavaScriptSerializer(); Dictionary<string, object> dic = new Dictionary<string, object>(); dic.Add("source", This); foreach (object i in parms) { Type t = i.GetType(); PropertyInfo[] myproperties = t.GetProperties(); dic.Add(myproperties[0].Name, myproperties[0].GetValue(i, null)); } return json.Serialize(dic); } }}