Model 和 JSON 间互相转换

在.net 4.0 下可以使用：

    // using System.Runtime.Serialization.Json;

     <summary>
     解析JSON，仿Javascript风格
     </summary>
    public static class JSON
    {

        public static T parse<T>(string jsonString)
        {
            using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)))
            {
                return (T)new DataContractJsonSerializer(typeof(T)).ReadObject(ms);
            }
        }

        public static string stringify(object jsonObject)
        {
            using (var ms = new MemoryStream())
            {
                new DataContractJsonSerializer(jsonObject.GetType()).WriteObject(ms, jsonObject);
                return Encoding.UTF8.GetString(ms.ToArray());
            }
        }

    }

在.net 以前版本下用JSON.NET

//Model转JSON
            Model m = new Model();
            m.city = "beijing";
            m.city_en = "北京";
            string json =   JsonConvert.SerializeObject(m);

//JSON转Model

m= (Model)JsonConvert.DeserializeObject<Model>(str);