C#解析json数据的方法

本文介绍三种方式

• 使用JavaScriptSerializer解析数据（速度较慢，不建议使用）
• 使用JsonConvert解析数据（建议使用在，在.net3.5下可以使用）
• 使用fastJson解析数据（推荐使用，但只支持.net4及以上）

JsonConvert方式

1、引用命名空间：Newtonsoft.Json

2、解析类

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[plain]    /// <summary>    /// Json帮助类    /// </summary>    public class JsonHelper    {        /// <summary>        /// 将对象序列化为JSON格式        /// </summary>        /// <param name="o">对象</param>        /// <returns>Json字符串</returns>        public static string SerializeObject(object o)        {            string json = JsonConvert.SerializeObject(o);            return json;        }        /// <summary>        /// 解析JSON字符串生成对象实体        /// </summary>        /// <typeparam name="T">对象类型</typeparam>        /// <param name="json">json字符串(eg.{"ID":"112","Name":"石子儿"})</param>        /// <returns>对象实体</returns>        public static T DeserializeJsonToObject<T>(string json) where T : class        {            JsonSerializer serializer = new JsonSerializer();            StringReader sr = new StringReader(json);            object o = serializer.Deserialize(new JsonTextReader(sr), typeof(T));            T t = o as T;            return t;        }        /// <summary>        /// 解析JSON数组生成对象实体集合        /// </summary>        /// <typeparam name="T">对象类型</typeparam>        /// <param name="json">json数组字符串(eg.[{"ID":"112","Name":"石子儿"}])</param>        /// <returns>对象实体集合</returns>        public static List<T> DeserializeJsonToList<T>(string json) where T : class        {            JsonSerializer serializer = new JsonSerializer();            StringReader sr = new StringReader(json);            object o = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));            List<T> list = o as List<T>;            return list;        }        /// <summary>        /// 反序列化JSON到给定的匿名对象.        /// </summary>        /// <typeparam name="T">匿名对象类型</typeparam>        /// <param name="json">json字符串</param>        /// <param name="anonymousTypeObject">匿名对象</param>        /// <returns>匿名对象</returns>        public static T DeserializeAnonymousType<T>(string json, T anonymousTypeObject)        {            T t = JsonConvert.DeserializeAnonymousType(json, anonymousTypeObject);            return t;        }    }[/code]

fastJson方式

1、引入命名空间 fastJSON

下载地址：http://download.csdn.net/detail/mrli113/9685273

2、解析类

    public class JsonHelper    {        /// <summary>        /// 将对象转换成json字符串        /// </summary>        /// <param name="o"></param>        /// <returns></returns>        public static string SerializeObject(object o)        {            return JSON.Instance.ToJSON(o);        }        /// <summary>        /// 将对象转换成模型        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="json"></param>        /// <returns></returns>        public static T JSONStringToT<T>(string json)        {            T t = (T)JSON.Instance.ToObject(json);            return t;        }        /// <summary>        /// 将json字符串换成List<T>        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="JsonStr"></param>        /// <returns></returns>        public static List<T> JSONStringToList<T>(string JsonStr)        {            List<T> objs = JSON.Instance.ToObject<List<T>>(JsonStr);            return objs;        }        /// <summary>        /// JSON文本转对象,指定类型        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="JsonStr"></param>        /// <returns></returns>        public static object JSONStringToList<T>(string JsonStr, System.Type type)        {            object objs = JSON.Instance.ToObject(JsonStr,type);            return objs;        }      }

JavaScriptSerializer方式

1、引入命名空间 System.Web.Script.Serialization

2、解析类

    public static class JsonHelper    {        public static JavaScriptSerializer Serializer = new JavaScriptSerializer();        /// <summary>        /// 将对象转换成json字符串        /// </summary>        /// <param name="o"></param>        /// <returns></returns>        public static string SerializeObject(object o)        {            return Serializer.Serialize(o);        }        /// <summary>        /// 将对象转换成特定模型        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="o"></param>        /// <returns></returns>        public static T JSONObjectToT<T>(object o)        {            T t=Serializer.ConvertToType<T>(o);            return t;        }        /// <summary>        /// json字符串转换成模型对象        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="json"></param>        /// <returns></returns>        public static T JSONStringToT<T>(string json)        {            T t= (T)Serializer.DeserializeObject(json);            return t;        }        /// <summary>        /// json字符串转出List对象        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="JsonStr"></param>        /// <returns></returns>        public static List<T> JSONStringToList<T>(string JsonStr)        {            JavaScriptSerializer Serializer = new JavaScriptSerializer();            List<T> objs = Serializer.Deserialize<List<T>>(JsonStr);            return objs;        }      }