Json转Hashtable的转换

json 转换为Hashtable

        /// <summary>
        /// Json转Hashtable
        /// </summary>
        /// <param name="json"></param>
        /// <returns></returns>
        public static Hashtable Json2Hashtable(string json)
        {
            return JsonConvert.DeserializeObject<Hashtable>(json);
        }    

Json数组转Hashtable

　　   /// <summary>
        ///  Json转Hashtable
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="json"></param>
        /// <returns></returns>
        public static List<T> Json2ListHashtable<T>(string json)
        {
            return JsonConvert.DeserializeObject<List<T>>(json);
        }

dataSet 反序列化成  json  

        /// <summary>
        /// 将dataset 换换为join 字符串
        /// </summary>
        /// <param name="ds"></param>
        /// <returns></returns>
        public string toSimpleJson(DataSet ds)
        {
            Newtonsoft.Json.Converters.IsoDateTimeConverter timeConverter = new Newtonsoft.Json.Converters.IsoDateTimeConverter();
            timeConverter.DateTimeFormat = "yyyy'-'MM'-'dd' 'HH':'mm':'ss'.'fff";
            string result = JsonConvert.SerializeObject(ds, timeConverter);

            return result;
        }

使用上面的方法 必须引用 ：Newtonsoft.Json