json序列化反序列化

 public class JsonHelper
    {

        /// <summary>
        /// obj转换成json 的string类型
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string JavaScriptSerialize<T>(T obj)
        {
           return JsonConvert.SerializeObject(obj);
        }

        /// <summary>
        /// json的string字符串转换成数组对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="json"></param>
        /// <returns></returns>
        public static T JavaScriptDeserialize<T>(string json)
        {
            return JsonConvert.DeserializeObject<T>(json);
        }

        /// <summary>
        /// 序列化object 为 JSON
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string JsonSerialize<T>(T obj)
        {
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
            MemoryStream ms = new MemoryStream();
            serializer.WriteObject(ms, obj);
            string retVal = Encoding.UTF8.GetString(ms.ToArray());
            return retVal;
        }

        /// <summary>
        /// 反序列化json为object
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="json"></param>
        /// <returns></returns>
        public static T JSONDeserialize<T>(string json)
        {
            T obj = Activator.CreateInstance<T>();
            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json));
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
            obj = (T)serializer.ReadObject(ms);
            ms.Close();
            return obj;
        }

        /// <summary>
        /// 序列化object为XML
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string XMLSerialize<T>(T obj)
        {
            XmlSerializer serializer = new XmlSerializer(obj.GetType());
            MemoryStream ms = new MemoryStream();
            serializer.Serialize(ms, obj);
            string retVal = Encoding.UTF8.GetString(ms.ToArray());
            return retVal;
        }

        /// <summary>
        /// 反序列化xml为object
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="xml"></param>
        /// <returns></returns>
        public static T XMLDeserialize<T>(string xml)
        {
            T obj = Activator.CreateInstance<T>();
            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(xml));
            XmlSerializer serializer = new XmlSerializer(obj.GetType());
            obj = (T)serializer.Deserialize(ms);
            ms.Close();
            return obj;
        }

        /// <summary>
        /// 将键值对转换成字典
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static IDictionary<string, string> ToDictionary(NameValueCollection source)
        {
            return source.AllKeys.ToDictionary(k => k, k => source[k]);
        }
    }