.Net3.5扩展方法实现对象JSON序列化

.NET 3.5 还包含一个新的new System.Runtime.Serialization.DataContractJsonSerializer class 类 ，你也可以用它来做JSON (JavaScript Object Notation)序列化/反序列化的工作。  

/// <summary>
    /// Json数据转换封装
    /// </summary>
    public static class JsonHelper
    {
        /// <summary>
        /// 将时间由"\/Date(10000000000-0700)\/" 格式转换成 "yyyy-MM-dd HH:mm:ss" 格式的字符串
        /// </summary>
        /// <param name="m"></param>
        /// <returns></returns>
        private static string GetDatetimeString(Match m)
        {
            string sRet = "";
            try
            {
                System.DateTime dt = new DateTime(1970, 1, 1);
                dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));
                dt = dt.ToLocalTime();
                sRet = dt.ToString("yyyy-MM-dd HH:mm:ss");
            }
            catch
            { }

            return sRet;
        }

        /// <summary>
        /// 将时间由 "yyyy-MM-dd HH:mm:ss" 格式的字符串转换成"\/Date(10000000000-0700)\/" 格式
        /// </summary>
        /// <param name="m"></param>
        /// <returns></returns>
        private static string GetDatetimeJson(Match m)
        {
            String sRet = "";
            try
            {
                DateTime dt = DateTime.Parse(m.Groups[1].Value);
                dt = dt.ToUniversalTime();
                TimeSpan ts = dt - DateTime.Parse("1970-01-01");
                sRet = string.Format("\\/Date({0}-0700)\\/", ts.TotalMilliseconds);
            }
            catch
            { }
            return sRet;
        }

        /// <summary>
        /// 扩展Object 方法 ToJson
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static String ToJson(this object obj)
        {
            DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(obj.GetType());
            MemoryStream ms = new MemoryStream();
            jsonSerializer.WriteObject(ms, obj);

            String sRet = Encoding.UTF8.GetString(ms.ToArray());
            ms.Close();

            //将时间由"\/Date(10000000000-0700)\/" 格式转换成 "yyyy-MM-dd HH:mm:ss" 格式的字符串
            string sPattern = @"\\/Date\((\d+)-\d+\)\\/";
            MatchEvaluator myMatchEvaluator = new MatchEvaluator(GetDatetimeString);
            Regex reg = new Regex(sPattern);
            sRet = reg.Replace(sRet, myMatchEvaluator);
           
            return sRet;
        }

        /// <summary>
        /// Jason deSerialize
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sJason"></param>
        /// <returns></returns>
        public static T FromJson<T>(String sJasonData)
        {
            //将时间由 "yyyy-MM-dd HH:mm:ss" 格式的字符串转换成"\/Date(10000000000-0700)\/" 格式
            string sPattern = @"(\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2})";
            MatchEvaluator myMatchEvaluator = new MatchEvaluator(GetDatetimeJson);
            Regex reg = new Regex(sPattern);
            string src = reg.Replace(sJasonData, myMatchEvaluator);

            DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(T));
            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(src));
            object obj = jsonSerializer.ReadObject(ms);

            return (T)obj;
        }

    }

 

摘自：http://hi.baidu.com/woxxf/blog/item/66edcf51447d382343a75b5d.html