持久化一个对象

Posted 2020-09-30 我没有领悟

1.对象与文件之间序列化/反序列化

       public static void SerializeToFile<T>(T obj,string dataFile)
        {
            using (FileStream fileStram = File.Create(dataFile))
            {
                BinaryFormatter binSerializer = new BinaryFormatter();
                binSerializer.Serialize(fileStram, obj);
            }
        }

        public static T DeserializeFromFile<T>(string dataFile)
        {
            T obj = default(T);
            using (FileStream fileStream = File.OpenRead(dataFile))
            {
                BinaryFormatter binSerializer = new BinaryFormatter();
                obj =(T)binSerializer.Deserialize(fileStream);
            }
            return obj;
        }

测试：

       static void Main(string[] args)
        {
            ArrayList list = new ArrayList() { "Zero", "One", "Two" };
            SerializeHelper.SerializeToFile(list, "HT.data");
            ArrayList list2 = SerializeHelper.DeserializeFromFile<ArrayList>("HT.data");
            foreach (var item in list2)
            {
                Console.WriteLine(item.ToString());
            }

            Console.ReadKey();
        }

2.对象与字节流之间序列化/反序列化

        public static byte[] Serialize<T>(T obj)
        {
            using (MemoryStream memStream = new MemoryStream())
            {
                BinaryFormatter binSerializer = new BinaryFormatter();
                binSerializer.Serialize(memStream, obj);
                return memStream.ToArray();
            }
        }

        public static T Deserialize<T>(byte[] serializedObj)
        {
            T obj = default(T);
            using (MemoryStream memStream = new MemoryStream(serializedObj))
            {
                BinaryFormatter binSerializer = new BinaryFormatter();
                obj = (T)binSerializer.Deserialize(memStream);
            }
            return obj;
        }