json开始流行了，性能比xml快，所以好多js类库(如jquery)都支持json格式了，通过ASP.NET与js的结合操作json数据传递应该很爽，所以本文使用C#开发一个json类，在看文章前推荐你一些文章：
实用C#中任意类型数据转成JSON格式数据输出
http://www.xueit.com/html/2009-12-15/21-1506045328843.html
以实例讲解json格式应用的json详细教程
http://www.xueit.com/html/2009-08/33_4398_00.html
好了，说看看这个json类的事情，使用本文中的JSONConvert类可将任意JSON字符串转化为JSONObject或JSONArray 对象，并获取需要的值，克服了.NET自带JSON类反序列化时需知道并引用序列化时使用的类的缺点。当然，也可以使用JSONConvert类进行序列 化，构造出JSON字符串。
下面是类的源码，可以复制直接使用哦。
json类 Code [http://www.xueit.com]//using System.Collections.Generic; //using System.Text; //using System.Text.RegularExpressions; /// <summary> /// 类 名：JSONConvert /// 描 述：JSON解析类 /// 编 写：dnawo /// 站 点：http://www.mzwu.com/ /// 日 期：2010-01-06 /// 版 本：1.1.0 /// </summary> public static class JSONConvert { #region 全局变量 private static JSONObject _json = new JSONObject();//寄存器 private static readonly string _SEMICOLON = "@semicolon";//分号转义符 private static readonly string _COMMA = "@comma"; //逗号转义符 #endregion #region 字符串转义 /// <summary> /// 字符串转义,将双引号内的:和,分别转成_SEMICOLON和_COMMA /// </summary> /// <param name="text"></param> /// <returns></returns> private static string StrEncode(string text) { MatchCollection matches = Regex.Matches(text, "\\\"[^\\\"] \\\""); foreach (Match match in matches) { text = text.Replace(match.Value, match.Value.Replace(":", _SEMICOLON).Replace(",", _COMMA)); } return text; } /// <summary> /// 字符串转义,将_SEMICOLON和_COMMA分别转成:和, /// </summary> /// <param name="text"></param> /// <returns></returns> private static string StrDecode(string text) { return text.Replace(_SEMICOLON, ":").Replace(_COMMA, ","); } #endregion #region JSON最小单元解析 /// <summary> /// 最小对象转为JSONObject /// </summary> /// <param name="text"></param> /// <returns></returns> private static JSONObject DeserializeSingletonObject(string text) { JSONObject jsonObject = new JSONObject(); MatchCollection matches = Regex.Matches(text, "(\\\"(?<key>[^\\\"] )\\\":\\\"(?<value>[^,\\\"] )\\\")|(\\\"(?<key>[^\\\"] )\\\":(?<value>[^,\\\"\\}] ))"); foreach (Match match in matches) { string value = match.Groups["value"].Value; jsonObject.Add(match.Groups["key"].Value, _json.ContainsKey(value) ? _json[value] : StrDecode(value)); } return jsonObject; } /// <summary> /// 最小数组转为JSONArray /// </summary> /// <param name="text"></param> /// <returns></returns> private static JSONArray DeserializeSingletonArray(string text) { JSONArray jsonArray = new JSONArray(); MatchCollection matches = Regex.Matches(text, "(\\\"(?<value>[^,\\\"] )\")|(?<value>[^,\\[\\]] )"); foreach (Match match in matches) { string value = match.Groups["value"].Value; jsonArray.Add(_json.ContainsKey(value) ? _json[value] : StrDecode(value)); } return jsonArray; } /// <summary> /// 反序列化 /// </summary> /// <param name="text"></param> /// <returns></returns> private static string Deserialize(string text) { text = StrEncode(text);//转义;和, int count = 0; string key = string.Empty; string pattern = "(\\{[^\\[\\]\\{\\}] \\})|(\\[[^\\[\\]\\{\\}] \\])"; while (Regex.IsMatch(text, pattern)) { MatchCollection matches = Regex.Matches(text, pattern); foreach (Match match in matches) { key = "___key" count "___"; if (match.Value.Substring(0, 1) == "{") _json.Add(key, DeserializeSingletonObject(match.Value)); else _json.Add(key, DeserializeSingletonArray(match.Value)); text = text.Replace(match.Value, key); count ; } } return text; } #endregion #region 公共接口 /// <summary> /// 序列化JSONObject对象 /// </summary> /// <param name="text"></param> /// <returns></returns> public static JSONObject DeserializeObject(string text) { return _json[Deserialize(text)] as JSONObject; } /// <summary> /// 序列化JSONArray对象 /// </summary> /// <param name="text"></param> /// <returns></returns> public static JSONArray DeserializeArray(string text) { return _json[Deserialize(text)] as JSONArray; } /// <summary> /// 反序列化JSONObject对象 /// </summary> /// <param name="jsonObject"></param> /// <returns></returns> public static string SerializeObject(JSONObject jsonObject) { StringBuilder sb = new StringBuilder(); sb.Append("{"); foreach (KeyValuePair<string, object> kvp in jsonObject) { if (kvp.Value is JSONObject) { sb.Append(string.Format("\"{0}\":{1},", kvp.Key, SerializeObject((JSONObject)kvp.Value))); } else if (kvp.Value is JSONArray) { sb.Append(string.Format("\"{0}\":{1},", kvp.Key, SerializeArray((JSONArray)kvp.Value))); } else if (kvp.Value is String) { sb.Append(string.Format("\"{0}\":\"{1}\",", kvp.Key, kvp.Value)); } else { sb.Append(string.Format("\"{0}\":\"{1}\",", kvp.Key, "")); } } if (sb.Length > 1) sb.Remove(sb.Length - 1, 1); sb.Append("}"); return sb.ToString(); } /// <summary> /// 反序列化JSONArray对象 /// </summary> /// <param name="jsonArray"></param> /// <returns></returns> public static string SerializeArray(JSONArray jsonArray) { StringBuilder sb = new StringBuilder(); sb.Append("["); for (int i = 0; i < jsonArray.Count; i ) { if (jsonArray[i] is JSONObject) { sb.Append(string.Format("{0},", SerializeObject((JSONObject)jsonArray[i]))); } else if (jsonArray[i] is JSONArray) { sb.Append(string.Format("{0},", SerializeArray((JSONArray)jsonArray[i]))); } else if (jsonArray[i] is String) { sb.Append(string.Format("\"{0}\",", jsonArray[i])); } else { sb.Append(string.Format("\"{0}\",", "")); } } if (sb.Length > 1) sb.Remove(sb.Length - 1, 1); sb.Append("]"); return sb.ToString(); } #endregion } /// <summary> /// 类 名：JSONObject /// 描 述：JSON对象类 /// 版 本：1.1.0 /// 更新历史： /// 2010-01-06 继承Dictionary<TKey, TValue>代替this[] /// </summary> public class JSONObject : Dictionary<string, object> {} /// <summary> /// 类 名：JSONArray /// 描 述：JSON数组类 /// 版 本：1.1.0 /// 更新历史： /// 2010-01-06 继承List<T>代替this[] /// </summary> public class JSONArray : List<object> {}
嗯，json写完了，下面来看下使用的方法：
Code [http://www.xueit.com]//序列化 JSONArray jsonArray = new JSONArray(); jsonArray.Add("2006"); jsonArray.Add("2007"); jsonArray.Add("2008"); jsonArray.Add("2009"); jsonArray.Add("2010"); JSONObject jsonObject = new JSONObject(); jsonObject.Add("domain", "mzwu.com"); jsonObject.Add("years", jsonArray); Console.WriteLine(JSONConvert.SerializeObject(jsonObject)); //反序列化 "{\"domain\":\"mzwu.com\",\"years\":[2006,2007,2008,2009,2010]}" JSONObject json = JSONConvert.DeserializeObject(JSONConvert.SerializeObject(jsonObject)); if (json != null) { Console.WriteLine(json["domain"]); Console.WriteLine(((JSONArray)json["years"])[3]); }
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