/// <summary>
        /// 功能:集合按需要序列化
        /// author:倉儲大叔
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <param name="fun"></param>
        /// <returns></returns>
        public static string ToJson(this object type, params string[] param)
        {
            StringBuilder buffer = new StringBuilder();
            if (type.GetType().Name == "List`1")
            {
                buffer.Insert(0, "[");
                foreach (var t in (IEnumerable<object>)type)
                {
                    GeneratorJsonStr(buffer, t, param);
                }
                buffer.Append("]");
            }
            else
            {
                GeneratorJsonStr(buffer, type, param);
            }
            return buffer.ToString();
        }
        /// <summary>
        /// 為對象生成Json字符(fu)串
        /// </summary>
        /// <param name="buffer"></param>
        /// <param name="t"></param>
        /// <param name="param"></param>
        static void GeneratorJsonStr(StringBuilder buffer, object t, params string[] param)
        {
            var obj = new List<string>();
            foreach (var item in param)
            {
                var p = t.GetType().GetProperty(item, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
                if (p != null)
                {
                    if (p.PropertyType == typeof(string))
                        obj.Add(p.Name + ":\"" + p.GetValue(t) + "\"");
                    else
                        obj.Add(p.Name + ":" + p.GetValue(t));
                }
            }
            if (obj.Count > 0)
                buffer.Append("{" + string.Join(",", obj) + "}");
        }