在c#中 Json的序列化与反序列化

    public static class JsonTools
    {
        #region 支持net框架4.0以上
        //DataContractJsonSerializer  需要引用System.Runtime.Serialization

        public static string ObjectToJson<T>(T obj)
        {
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
            string json = "";
            using (MemoryStream ms = new MemoryStream())
            {
                serializer.WriteObject(ms, obj);
                json = Encoding.UTF8.GetString(ms.ToArray());
                ms.Close();
            }

            return json;
        }

        public static T JsonToObject<T>(string json)
        {
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
            T obj = default(T);
            using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))
            {
                obj = (T)serializer.ReadObject(ms);
                ms.Close();
            }
            return obj;
        }

        #endregion


        #region 支持net框架3.5以上
        //JavaScriptSerializer 需要引用 Sysytem.Web.Extensions

        //json序列化
        public static string ObjectToJson2<T>(T obj)
        {
            JavaScriptSerializer js = new JavaScriptSerializer();
            //json序列化
            string s = js.Serialize(obj);
            return s;
        }

        public static T JsonToObject2<T>(string JsonStr)
        {
            JavaScriptSerializer Serializer = new JavaScriptSerializer();
            T obj = Serializer.Deserialize<T>(JsonStr);
            return obj;
        }

        #endregion 


        //Bitmap转为Base64字符串
        public static string BitmapToString(Bitmap bitmap)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                ms.Seek(0, SeekOrigin.Begin);
                byte[] buffer = ms.ToArray();
                string str = System.Convert.ToBase64String(buffer);
                ms.Close();

                return str;
            }
        }

        //Base64字符串转图片
        public static Bitmap StringToBitmap(string base64Str)
        {
            if (!String.IsNullOrEmpty(base64Str))
            {
                using (MemoryStream ms = new MemoryStream())
                {
                    byte[] buffer = System.Convert.FromBase64String(base64Str);
                    ms.Write(buffer, 0, buffer.Length);
                    ms.Seek(0, SeekOrigin.Begin);
                    Bitmap bmp = new Bitmap(ms);

                    return bmp;
                }
            }

            return null;
        }
    }

关于数据类：

    public class People
    {
        public string Name = "";
        public int Age = 0;

        public List<Student> StuList = null;
    }

    public class Student
    {
        public string Num = "";
        public string Name = "";
    }

当使用DataContractJsonSerializer时是需要使用[DataContract]，但是我没用也没出现问题，说是跟.net框架版本有关，如果出现了就加上试试.