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:
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。
- //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:
- //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]);
- }