/// <summary>

    /// Json 和对象的相互转换  ——需引用using Newtonsoft.Json;   即：Jsonnet.net.....

    /// </summary>

    public static class JsonHelper

    {

        /// <summary>

        /// 把对象转换为JSON字符串

        /// </summary>

        /// <param name="o">对象</param>

        /// <returns>JSON字符串</returns>

        public static string ObjectToJson(this object o)

        {

            if (o == null) return null;

            return JsonConvert.SerializeObject(o);

        }

        /// <summary>

        /// 把Json文本转为实体

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="input"></param>

        /// <returns></returns>

        public static T JsonToObject<T>(this string input)

        {

            try

            {

                return JsonConvert.DeserializeObject<T>(input);

            }

            catch (Exception ex)

            {

                return default(T);

            }

        }

    }

  private void btnObjToJson_Click(object sender, EventArgs e)

        {

            List<Test> timePart = new List<Test>();

            timePart.Add(new Test { BeginTime = 8.10, EndTime = 8.15 });

            timePart.Add(new Test { BeginTime = 8.15, EndTime = 8.25 });

            timePart.Add(new Test { BeginTime = 8.26, EndTime = 8.55 });

            string json = JsonHelper.ObjectToJson(timePart);

            MessageBox.Show("json\r\n==" + json);

        }

        private void btnJsonToObj_Click(object sender, EventArgs e)

        {

            List<Test> timePart = new List<Test>();

            timePart.Add(new Test { BeginTime = 8.10, EndTime = 8.15 });

            timePart.Add(new Test { BeginTime = 8.15, EndTime = 8.25 });

            timePart.Add(new Test { BeginTime = 8.26, EndTime = 8.55 });

            string json = JsonHelper.ObjectToJson(timePart);

            List<Test> list = JsonHelper.JsonToObject<List<Test>>(json);

            MessageBox.Show("list==" +list.Count);

        }