转自：http://www.jb51.net/article/43699.htm
这篇文章主要介绍了C#实现简单的JSON序列化功能,大家可以参考使用
好久没有做web了，JSON目前比较流行，闲得没事，所以动手试试将对象序列化为JSON字符（尽管DotNet Framework已经有现成的库，也有比较好的第三方开源库）,而且只是实现了处理简单的类型,并且DateTime处理的也不专业，有兴趣的筒子可以扩展，代码比较简单，反序列化木有实现:( ，直接贴代码吧，都有注释了，所以废话不多说 :)

1. 
   
2. <P>
   
3. 测试类/// <summary>
   
4.     /// Nested class of Person.
   
5.     /// </summary>
   
6.     public class House
   
7.     {
   
8.         public string Name
   
9.         {
   
10.             get;
    
11.             set;
    
12.         }
    
13.         public double Price
    
14.         {
    
15.             get;
    
16.             set;
    
17.         }
    
18.     }
    
19.     /// <summary>
    
20.     /// Person dummy class
    
21.     /// </summary>
    
22.     public class Person
    
23.     {
    
24.         public string Name
    
25.         {
    
26.             get;
    
27.             set;
    
28.         }
    
29.         public int Age
    
30.         {
    
31.             get;
    
32.             set;
    
33.         }
    
34.         public string Address
    
35.         {
    
36.             get;
    
37.             set;
    
38.         }
    
39.         private int h = 12;
    
40.         public bool IsMarried
    
41.         {
    
42.             get;
    
43.             set;
    
44.         }
    
45.         public string[] Names
    
46.         {
    
47.             get;
    
48.             set;
    
49.         }
    
50.         public int[] Ages
    
51.         {
    
52.             get;
    
53.             set;
    
54.         }
    
55.         public House MyHouse
    
56.         {
    
57.             get;
    
58.             set;
    
59.         }
    
60.         public DateTime BirthDay
    
61.         {
    
62.             get;
    
63.             set;
    
64.         }
    
65.         public List<string> Friends
    
66.         {
    
67.             get;
    
68.             set;
    
69.         }
    
70.         public List<int> LoveNumbers
    
71.         {
    
72.             get;
    
73.             set;
    
74.         }
    
75.     }</P>
    
76. <DIV class=blockcode>
    
77. <BLOCKQUOTE>
    
78. 接口定义 /// <summary>
    
79. /// IJsonSerializer interface.
    
80. /// </summary>
    
81. interface IJsonSerializer
    
82. {
    
83. /// <summary>
    
84. /// Serialize object to json string.
    
85. /// </summary>
    
86. /// <typeparam name="T">The type to be serialized.</typeparam>
    
87. /// <param name="obj">Instance of the type T.</param>
    
88. /// <returns>json string.</returns>
    
89. string Serialize(object obj);
    
90. /// <summary>
    
91. /// Deserialize json string to object.
    
92. /// </summary>
    
93. /// <typeparam name="T">The type to be deserialized.</typeparam>
    
94. /// <param name="jsonString">json string.</param>
    
95. /// <returns>instance of type T.</returns>
    
96. T Deserialize<T>(string jsonString);
    
97. }

复制代码

接口实现，还有待完善..

1. 
   
2. /// <summary>
   
3. /// Implement IJsonSerializer, but Deserialize had not been implemented.
   
4. /// </summary>
   
5. public class JsonSerializer : IJsonSerializer
   
6. {
   
7. /// <summary>
   
8. /// Serialize object to json string.
   
9. /// </summary>
   
10. /// <typeparam name="T">The type to be serialized.</typeparam>
    
11. /// <param name="obj">Instance of the type T.</param>
    
12. /// <returns>json string.</returns>
    
13. public string Serialize(object obj)
    
14. {
    
15. if (obj == null)
    
16. {
    
17. return "{}";
    
18. }
    
19. // Get the type of obj.
    
20. Type t = obj.GetType();
    
21. // Just deal with the public instance properties. others ignored.
    
22. BindingFlags bf = BindingFlags.Instance | BindingFlags.Public;
    
23. PropertyInfo[] pis = t.GetProperties(bf);
    
24. StringBuilder json = new StringBuilder("{");
    
25. if (pis != null && pis.Length > 0)
    
26. {
    
27. int i = 0;
    
28. int lastIndex = pis.Length - 1;
    
29. foreach (PropertyInfo p in pis)
    
30. {
    
31. // Simple string
    
32. if (p.PropertyType.Equals(typeof(string)))
    
33. {
    
34. json.AppendFormat("\"{0}\":\"{1}\"", p.Name, p.GetValue(obj, null));
    
35. }
    
36. // Number,boolean.
    
37. else if (p.PropertyType.Equals(typeof(int)) ||
    
38. p.PropertyType.Equals(typeof(bool)) ||
    
39. p.PropertyType.Equals(typeof(double)) ||
    
40. p.PropertyType.Equals(typeof(decimal))
    
41. )
    
42. {
    
43. json.AppendFormat("\"{0}\":{1}", p.Name, p.GetValue(obj, null).ToString().ToLower());
    
44. }
    
45. // Array.
    
46. else if (isArrayType(p.PropertyType))
    
47. {
    
48. // Array case.
    
49. object o = p.GetValue(obj, null);
    
50. if (o == null)
    
51. {
    
52. json.AppendFormat("\"{0}\":{1}", p.Name, "null");
    
53. }
    
54. else
    
55. {
    
56. json.AppendFormat("\"{0}\":{1}", p.Name, getArrayValue((Array)p.GetValue(obj, null)));
    
57. }
    
58. }
    
59. // Class type. custom class, list collections and so forth.
    
60. else if (isCustomClassType(p.PropertyType))
    
61. {
    
62. object v = p.GetValue(obj, null);
    
63. if (v is IList)
    
64. {
    
65. IList il = v as IList;
    
66. string subJsString = getIListValue(il);
    
67. json.AppendFormat("\"{0}\":{1}", p.Name, subJsString);
    
68. }
    
69. else
    
70. {
    
71. // Normal class type.
    
72. string subJsString = Serialize(p.GetValue(obj, null));
    
73. json.AppendFormat("\"{0}\":{1}", p.Name, subJsString);
    
74. }
    
75. }
    
76. // Datetime
    
77. else if (p.PropertyType.Equals(typeof(DateTime)))
    
78. {
    
79. DateTime dt = (DateTime)p.GetValue(obj, null);
    
80. if (dt == default(DateTime))
    
81. {
    
82. json.AppendFormat("\"{0}\":\"\"", p.Name);
    
83. }
    
84. else
    
85. {
    
86. json.AppendFormat("\"{0}\":\"{1}\"", p.Name, ((DateTime)p.GetValue(obj, null)).ToString("yyyy-MM-dd HH:mm:ss"));
    
87. }
    
88. }
    
89. else
    
90. {
    
91. // TODO: extend.
    
92. }
    
93. if (i >= 0 && i != lastIndex)
    
94. {
    
95. json.Append(",");
    
96. }
    
97. ++i;
    
98. }
    
99. }
    
100. json.Append("}");
     
101. return json.ToString();
     
102. }
     
103. /// <summary>
     
104. /// Deserialize json string to object.
     
105. /// </summary>
     
106. /// <typeparam name="T">The type to be deserialized.</typeparam>
     
107. /// <param name="jsonString">json string.</param>
     
108. /// <returns>instance of type T.</returns>
     
109. public T Deserialize<T>(string jsonString)
     
110. {
     
111. throw new NotImplementedException("Not implemented :(");
     
112. }
     
113. /// <summary>
     
114. /// Get array json format string value.
     
115. /// </summary>
     
116. /// <param name="obj">array object</param>
     
117. /// <returns>js format array string.</returns>
     
118. string getArrayValue(Array obj)
     
119. {
     
120. if (obj != null)
     
121. {
     
122. if (obj.Length == 0)
     
123. {
     
124. return "[]";
     
125. }
     
126. object firstElement = obj.GetValue(0);
     
127. Type et = firstElement.GetType();
     
128. bool quotable = et == typeof(string);
     
129. StringBuilder sb = new StringBuilder("[");
     
130. int index = 0;
     
131. int lastIndex = obj.Length - 1;
     
132. if (quotable)
     
133. {
     
134. foreach (var item in obj)
     
135. {
     
136. sb.AppendFormat("\"{0}\"", item.ToString());
     
137. if (index >= 0 && index != lastIndex)
     
138. {
     
139. sb.Append(",");
     
140. }
     
141. ++index;
     
142. }
     
143. }
     
144. else
     
145. {
     
146. foreach (var item in obj)
     
147. {
     
148. sb.Append(item.ToString());
     
149. if (index >= 0 && index != lastIndex)
     
150. {
     
151. sb.Append(",");
     
152. }
     
153. ++index;
     
154. }
     
155. }
     
156. sb.Append("]");
     
157. return sb.ToString();
     
158. }
     
159. return "null";
     
160. }
     
161. /// <summary>
     
162. /// Get Ilist json format string value.
     
163. /// </summary>
     
164. /// <param name="obj">IList object</param>
     
165. /// <returns>js format IList string.</returns>
     
166. string getIListValue(IList obj)
     
167. {
     
168. if (obj != null)
     
169. {
     
170. if (obj.Count == 0)
     
171. {
     
172. return "[]";
     
173. }
     
174. object firstElement = obj[0];
     
175. Type et = firstElement.GetType();
     
176. bool quotable = et == typeof(string);
     
177. StringBuilder sb = new StringBuilder("[");
     
178. int index = 0;
     
179. int lastIndex = obj.Count - 1;
     
180. if (quotable)
     
181. {
     
182. foreach (var item in obj)
     
183. {
     
184. sb.AppendFormat("\"{0}\"", item.ToString());
     
185. if (index >= 0 && index != lastIndex)
     
186. {
     
187. sb.Append(",");
     
188. }
     
189. ++index;
     
190. }
     
191. }
     
192. else
     
193. {
     
194. foreach (var item in obj)
     
195. {
     
196. sb.Append(item.ToString());
     
197. if (index >= 0 && index != lastIndex)
     
198. {
     
199. sb.Append(",");
     
200. }
     
201. ++index;
     
202. }
     
203. }
     
204. sb.Append("]");
     
205. return sb.ToString();
     
206. }
     
207. return "null";
     
208. }
     
209. /// <summary>
     
210. /// Check whether t is array type.
     
211. /// </summary>
     
212. /// <param name="t"></param>
     
213. /// <returns></returns>
     
214. bool isArrayType(Type t)
     
215. {
     
216. if (t != null)
     
217. {
     
218. return t.IsArray;
     
219. }
     
220. return false;
     
221. }
     
222. /// <summary>
     
223. /// Check whether t is custom class type.
     
224. /// </summary>
     
225. /// <param name="t"></param>
     
226. /// <returns></returns>
     
227. bool isCustomClassType(Type t)
     
228. {
     
229. if (t != null)
     
230. {
     
231. return t.IsClass && t != typeof(string);
     
232. }
     
233. return false;
     
234. }
     
235. }

复制代码

测试代码

1. 
   
2. class Program
   
3. {
   
4. static void Main(string[] args)
   
5. {
   
6. Person ps = new Person()
   
7. {
   
8. Name = "Leon",
   
9. Age = 25,
   
10. Address = "China",
    
11. IsMarried = false,
    
12. Names = new string[] { "wgc", "leon", "giantfish" },
    
13. Ages = new int[] { 1, 2, 3, 4 },
    
14. MyHouse = new House()
    
15. {
    
16. Name = "HouseName",
    
17. Price = 100.01,
    
18. },
    
19. BirthDay = new DateTime(1986, 12, 20, 12, 12, 10),
    
20. Friends = new List<string>() { "friend1", "friend2" },
    
21. LoveNumbers = new List<int>() { 1, 2, 3 }
    
22. };
    
23. IJsonSerializer js = new JsonSerializer();
    
24. string s = js.Serialize(ps);
    
25. Console.WriteLine(s);
    
26. Console.ReadKey();
    
27. }
    
28. }

复制代码

生成的 JSON字符串 ：

1. 
   
2. {"Name":"Leon","Age":25,"Address":"China","IsMarried":false,"Names":["wgc","leon","giantfish"],"Ages":[1,2,3,4],"MyHouse":{"Name":"HouseName","Price":100.01},"BirthDay":"1986-12-20 12:12:10","Friends":["friend1","friend2"],"LoveNumbers":[1,2,3]}
   

复制代码

转自：http://www.jb51.net/article/43699.htm
这篇文章主要介绍了C#实现简单的JSON序列化功能,大家可以参考使用
好久没有做web了，JSON目前比较流行，闲得没事，所以动手试试将对象序列化为JSON字符（尽管DotNet Framework已经有现成的库，也有比较好的第三方开源库）,而且只是实现了处理简单的类型,并且DateTime处理的也不专业，有兴趣的筒子可以扩展，代码比较简单，反序列化木有实现:( ，直接贴代码吧，都有注释了，所以废话不多说 :)

1. 
   
2. <P>
   
3. 测试类/// <summary>
   
4.     /// Nested class of Person.
   
5.     /// </summary>
   
6.     public class House
   
7.     {
   
8.         public string Name
   
9.         {
   
10.             get;
    
11.             set;
    
12.         }
    
13.         public double Price
    
14.         {
    
15.             get;
    
16.             set;
    
17.         }
    
18.     }
    
19.     /// <summary>
    
20.     /// Person dummy class
    
21.     /// </summary>
    
22.     public class Person
    
23.     {
    
24.         public string Name
    
25.         {
    
26.             get;
    
27.             set;
    
28.         }
    
29.         public int Age
    
30.         {
    
31.             get;
    
32.             set;
    
33.         }
    
34.         public string Address
    
35.         {
    
36.             get;
    
37.             set;
    
38.         }
    
39.         private int h = 12;
    
40.         public bool IsMarried
    
41.         {
    
42.             get;
    
43.             set;
    
44.         }
    
45.         public string[] Names
    
46.         {
    
47.             get;
    
48.             set;
    
49.         }
    
50.         public int[] Ages
    
51.         {
    
52.             get;
    
53.             set;
    
54.         }
    
55.         public House MyHouse
    
56.         {
    
57.             get;
    
58.             set;
    
59.         }
    
60.         public DateTime BirthDay
    
61.         {
    
62.             get;
    
63.             set;
    
64.         }
    
65.         public List<string> Friends
    
66.         {
    
67.             get;
    
68.             set;
    
69.         }
    
70.         public List<int> LoveNumbers
    
71.         {
    
72.             get;
    
73.             set;
    
74.         }
    
75.     }</P>
    
76. <DIV class=blockcode>
    
77. <BLOCKQUOTE>
    
78. 接口定义 /// <summary>
    
79. /// IJsonSerializer interface.
    
80. /// </summary>
    
81. interface IJsonSerializer
    
82. {
    
83. /// <summary>
    
84. /// Serialize object to json string.
    
85. /// </summary>
    
86. /// <typeparam name="T">The type to be serialized.</typeparam>
    
87. /// <param name="obj">Instance of the type T.</param>
    
88. /// <returns>json string.</returns>
    
89. string Serialize(object obj);
    
90. /// <summary>
    
91. /// Deserialize json string to object.
    
92. /// </summary>
    
93. /// <typeparam name="T">The type to be deserialized.</typeparam>
    
94. /// <param name="jsonString">json string.</param>
    
95. /// <returns>instance of type T.</returns>
    
96. T Deserialize<T>(string jsonString);
    
97. }

复制代码

接口实现，还有待完善..

1. 
   
2. /// <summary>
   
3. /// Implement IJsonSerializer, but Deserialize had not been implemented.
   
4. /// </summary>
   
5. public class JsonSerializer : IJsonSerializer
   
6. {
   
7. /// <summary>
   
8. /// Serialize object to json string.
   
9. /// </summary>
   
10. /// <typeparam name="T">The type to be serialized.</typeparam>
    
11. /// <param name="obj">Instance of the type T.</param>
    
12. /// <returns>json string.</returns>
    
13. public string Serialize(object obj)
    
14. {
    
15. if (obj == null)
    
16. {
    
17. return "{}";
    
18. }
    
19. // Get the type of obj.
    
20. Type t = obj.GetType();
    
21. // Just deal with the public instance properties. others ignored.
    
22. BindingFlags bf = BindingFlags.Instance | BindingFlags.Public;
    
23. PropertyInfo[] pis = t.GetProperties(bf);
    
24. StringBuilder json = new StringBuilder("{");
    
25. if (pis != null && pis.Length > 0)
    
26. {
    
27. int i = 0;
    
28. int lastIndex = pis.Length - 1;
    
29. foreach (PropertyInfo p in pis)
    
30. {
    
31. // Simple string
    
32. if (p.PropertyType.Equals(typeof(string)))
    
33. {
    
34. json.AppendFormat("\"{0}\":\"{1}\"", p.Name, p.GetValue(obj, null));
    
35. }
    
36. // Number,boolean.
    
37. else if (p.PropertyType.Equals(typeof(int)) ||
    
38. p.PropertyType.Equals(typeof(bool)) ||
    
39. p.PropertyType.Equals(typeof(double)) ||
    
40. p.PropertyType.Equals(typeof(decimal))
    
41. )
    
42. {
    
43. json.AppendFormat("\"{0}\":{1}", p.Name, p.GetValue(obj, null).ToString().ToLower());
    
44. }
    
45. // Array.
    
46. else if (isArrayType(p.PropertyType))
    
47. {
    
48. // Array case.
    
49. object o = p.GetValue(obj, null);
    
50. if (o == null)
    
51. {
    
52. json.AppendFormat("\"{0}\":{1}", p.Name, "null");
    
53. }
    
54. else
    
55. {
    
56. json.AppendFormat("\"{0}\":{1}", p.Name, getArrayValue((Array)p.GetValue(obj, null)));
    
57. }
    
58. }
    
59. // Class type. custom class, list collections and so forth.
    
60. else if (isCustomClassType(p.PropertyType))
    
61. {
    
62. object v = p.GetValue(obj, null);
    
63. if (v is IList)
    
64. {
    
65. IList il = v as IList;
    
66. string subJsString = getIListValue(il);
    
67. json.AppendFormat("\"{0}\":{1}", p.Name, subJsString);
    
68. }
    
69. else
    
70. {
    
71. // Normal class type.
    
72. string subJsString = Serialize(p.GetValue(obj, null));
    
73. json.AppendFormat("\"{0}\":{1}", p.Name, subJsString);
    
74. }
    
75. }
    
76. // Datetime
    
77. else if (p.PropertyType.Equals(typeof(DateTime)))
    
78. {
    
79. DateTime dt = (DateTime)p.GetValue(obj, null);
    
80. if (dt == default(DateTime))
    
81. {
    
82. json.AppendFormat("\"{0}\":\"\"", p.Name);
    
83. }
    
84. else
    
85. {
    
86. json.AppendFormat("\"{0}\":\"{1}\"", p.Name, ((DateTime)p.GetValue(obj, null)).ToString("yyyy-MM-dd HH:mm:ss"));
    
87. }
    
88. }
    
89. else
    
90. {
    
91. // TODO: extend.
    
92. }
    
93. if (i >= 0 && i != lastIndex)
    
94. {
    
95. json.Append(",");
    
96. }
    
97. ++i;
    
98. }
    
99. }
    
100. json.Append("}");
     
101. return json.ToString();
     
102. }
     
103. /// <summary>
     
104. /// Deserialize json string to object.
     
105. /// </summary>
     
106. /// <typeparam name="T">The type to be deserialized.</typeparam>
     
107. /// <param name="jsonString">json string.</param>
     
108. /// <returns>instance of type T.</returns>
     
109. public T Deserialize<T>(string jsonString)
     
110. {
     
111. throw new NotImplementedException("Not implemented :(");
     
112. }
     
113. /// <summary>
     
114. /// Get array json format string value.
     
115. /// </summary>
     
116. /// <param name="obj">array object</param>
     
117. /// <returns>js format array string.</returns>
     
118. string getArrayValue(Array obj)
     
119. {
     
120. if (obj != null)
     
121. {
     
122. if (obj.Length == 0)
     
123. {
     
124. return "[]";
     
125. }
     
126. object firstElement = obj.GetValue(0);
     
127. Type et = firstElement.GetType();
     
128. bool quotable = et == typeof(string);
     
129. StringBuilder sb = new StringBuilder("[");
     
130. int index = 0;
     
131. int lastIndex = obj.Length - 1;
     
132. if (quotable)
     
133. {
     
134. foreach (var item in obj)
     
135. {
     
136. sb.AppendFormat("\"{0}\"", item.ToString());
     
137. if (index >= 0 && index != lastIndex)
     
138. {
     
139. sb.Append(",");
     
140. }
     
141. ++index;
     
142. }
     
143. }
     
144. else
     
145. {
     
146. foreach (var item in obj)
     
147. {
     
148. sb.Append(item.ToString());
     
149. if (index >= 0 && index != lastIndex)
     
150. {
     
151. sb.Append(",");
     
152. }
     
153. ++index;
     
154. }
     
155. }
     
156. sb.Append("]");
     
157. return sb.ToString();
     
158. }
     
159. return "null";
     
160. }
     
161. /// <summary>
     
162. /// Get Ilist json format string value.
     
163. /// </summary>
     
164. /// <param name="obj">IList object</param>
     
165. /// <returns>js format IList string.</returns>
     
166. string getIListValue(IList obj)
     
167. {
     
168. if (obj != null)
     
169. {
     
170. if (obj.Count == 0)
     
171. {
     
172. return "[]";
     
173. }
     
174. object firstElement = obj[0];
     
175. Type et = firstElement.GetType();
     
176. bool quotable = et == typeof(string);
     
177. StringBuilder sb = new StringBuilder("[");
     
178. int index = 0;
     
179. int lastIndex = obj.Count - 1;
     
180. if (quotable)
     
181. {
     
182. foreach (var item in obj)
     
183. {
     
184. sb.AppendFormat("\"{0}\"", item.ToString());
     
185. if (index >= 0 && index != lastIndex)
     
186. {
     
187. sb.Append(",");
     
188. }
     
189. ++index;
     
190. }
     
191. }
     
192. else
     
193. {
     
194. foreach (var item in obj)
     
195. {
     
196. sb.Append(item.ToString());
     
197. if (index >= 0 && index != lastIndex)
     
198. {
     
199. sb.Append(",");
     
200. }
     
201. ++index;
     
202. }
     
203. }
     
204. sb.Append("]");
     
205. return sb.ToString();
     
206. }
     
207. return "null";
     
208. }
     
209. /// <summary>
     
210. /// Check whether t is array type.
     
211. /// </summary>
     
212. /// <param name="t"></param>
     
213. /// <returns></returns>
     
214. bool isArrayType(Type t)
     
215. {
     
216. if (t != null)
     
217. {
     
218. return t.IsArray;
     
219. }
     
220. return false;
     
221. }
     
222. /// <summary>
     
223. /// Check whether t is custom class type.
     
224. /// </summary>
     
225. /// <param name="t"></param>
     
226. /// <returns></returns>
     
227. bool isCustomClassType(Type t)
     
228. {
     
229. if (t != null)
     
230. {
     
231. return t.IsClass && t != typeof(string);
     
232. }
     
233. return false;
     
234. }
     
235. }

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测试代码

1. 
   
2. class Program
   
3. {
   
4. static void Main(string[] args)
   
5. {
   
6. Person ps = new Person()
   
7. {
   
8. Name = "Leon",
   
9. Age = 25,
   
10. Address = "China",
    
11. IsMarried = false,
    
12. Names = new string[] { "wgc", "leon", "giantfish" },
    
13. Ages = new int[] { 1, 2, 3, 4 },
    
14. MyHouse = new House()
    
15. {
    
16. Name = "HouseName",
    
17. Price = 100.01,
    
18. },
    
19. BirthDay = new DateTime(1986, 12, 20, 12, 12, 10),
    
20. Friends = new List<string>() { "friend1", "friend2" },
    
21. LoveNumbers = new List<int>() { 1, 2, 3 }
    
22. };
    
23. IJsonSerializer js = new JsonSerializer();
    
24. string s = js.Serialize(ps);
    
25. Console.WriteLine(s);
    
26. Console.ReadKey();
    
27. }
    
28. }

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生成的 JSON字符串 ：

1. 
   
2. {"Name":"Leon","Age":25,"Address":"China","IsMarried":false,"Names":["wgc","leon","giantfish"],"Ages":[1,2,3,4],"MyHouse":{"Name":"HouseName","Price":100.01},"BirthDay":"1986-12-20 12:12:10","Friends":["friend1","friend2"],"LoveNumbers":[1,2,3]}
   

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