Json.NET读写Json文件（转）

Json文件的写入读取

采用的Json.NET提供的API。

http://james.newtonking.com/projects/json-net.aspx
http://www.codeplex.com/json/

以下是demo代码

[csharp] view plaincopy

1. using System;  
2. using System.Collections.Generic;  
3. using System.Linq;  
4. using System.Web;  
5. using System.Web.UI;  
6. using System.Web.UI.WebControls;  
7. using System.IO;  
8. using System.Text;  
9. using Newtonsoft.Json;  
10. using com.zjpx.model;  
11. using System.Collections;  
12. using Newtonsoft.Json.Converters;  
13.   
14. namespace web  
15. {  
16.     public partial class testJson : System.Web.UI.Page  
17.     {  
18.         protected void Page_Load(object sender, EventArgs e)  
19.         {  
20.             ConfigFileModel cfm = new ConfigFileModel();  //实体模型类  
21.             cfm.CreateDate = "2012-02-23";  
22.             cfm.FileName = "test.txt";  
23.   
24.             //可以操作集合  
25.             Hashtable ht = new Hashtable();  
26.             ht.Add("hs_name", "alex");  
27.             ht.Add("hs_pwd", "ggg");  
28.   
29.             //序列化  
30.             string js1 = JsonConvert.SerializeObject(cfm);  
31.             string js2 = JsonConvert.SerializeObject(ht);  
32.             Response.Write(js1);  
33.             Response.Write("<br/>");  
34.             Response.Write(js2);  
35.             //"{\"FileName\":\"test.txt\",\"CreateDate\":\"2012-02-23\"}"  
36.             //"{\"hs_pwd\":\"ggg\",\"hs_name\":\"alex\"}"  
37.   
38.             //反序列化  
39.             ConfigFileModel debc1 = JsonConvert.DeserializeObject<ConfigFileModel>(js1);  
40.             ConfigFileModel debc2 = JsonConvert.DeserializeObject<ConfigFileModel>(js2);  
41.   
42.             //找到服务器物理路径  
43.             //string serverAppPath = Request.PhysicalApplicationPath.ToString();  
44.             string serverAppPath = @"d:\";  
45.             //构成配置文件路径  
46.             string con_file_path =@""+ serverAppPath + @"config.json";  
47.   
48.   
49.             if (!File.Exists(con_file_path))  
50.             {  
51.                 File.Create(con_file_path);  
52.             }  
53.   
54.         //把模型数据写到文件  
55.             using (StreamWriter sw = new StreamWriter(con_file_path))  
56.             {  
57.                 try  
58.                 {  
59.   
60.                     JsonSerializer serializer = new JsonSerializer();  
61.                     serializer.Converters.Add(new JavaScriptDateTimeConverter());  
62.                     serializer.NullValueHandling = NullValueHandling.Ignore;  
63.   
64.                     //构建Json.net的写入流  
65.                     JsonWriter writer = new JsonTextWriter(sw);  
66.                     //把模型数据序列化并写入Json.net的JsonWriter流中  
67.                     serializer.Serialize(writer, cfm);  
68.                     //ser.Serialize(writer, ht);  
69.                     writer.Close();  
70.                     sw.Close();  
71.   
72.                 }  
73.   
74.         }  
75.             catch (Exception ex)  
76.             {  
77.                 ex.Message.ToString();  
78.             }  
79.   
80.              //读取json文件  
81.              using (StreamReader sr = new StreamReader(con_file_path))  
82.              {  
83.           try  
84.                   {  
85.                       JsonSerializer serializer = new JsonSerializer();  
86.                       serializer.Converters.Add(new JavaScriptDateTimeConverter());  
87.                       serializer.NullValueHandling = NullValueHandling.Ignore;  
88.   
89.                       //构建Json.net的读取流  
90.                       JsonReader reader = new JsonTextReader(sr);  
91.                       //对读取出的Json.net的reader流进行反序列化，并装载到模型中  
92.                       cfm = serializer.Deserialize<ConfigFileModel>(reader);  
93.   
94.                       Response.Write("<br/>");  
95.                       Response.Write(cfm.FileName+", "+cfm.CreateDate);  
96.           }  
97.                   catch (Exception ex)  
98.                   {  
99.                       ex.Message.ToString();  
100.                   }  
101.               }  
102.   
103.         }  
104.     }  
105.   
106.     public class ConfigFileModel  
107.     {  
108.         public ConfigFileModel() { }  
109.   
110.         string _fileName;  
111.   
112.         public string FileName  
113.         {  
114.             get { return _fileName; }  
115.             set { _fileName = value; }  
116.         }  
117.         string _createDate;  
118.   
119.         public string CreateDate  
120.         {  
121.             get { return _createDate; }  
122.             set { _createDate = value; }  
123.         }  
124.     }  
125. }