c# winform 应用编程代码总结 9

32、基本序列化

    [Serializable]
    public class MyObject 
    {
        public int n1 = 0;
        public int n2 = 0;
        public String str = null;
    }
    class Class1
    {
        [STAThread]
        static void Main(string[] args)
        {
            Read();
            Write();
        }

        static void Read()
        {
            MyObject obj = new MyObject();
            obj.n1 = 1;
            obj.n2 = 24;
            obj.str = "Some String";
            IFormatter formatter = new BinaryFormatter();
            Stream stream = new FileStream("MyFile.bin", FileMode.Create, FileAccess.Write, FileShare.None);
            formatter.Serialize(stream, obj);
            stream.Close();
        }

        static void Write()
        {
            IFormatter formatter = new BinaryFormatter();
            Stream stream = new FileStream("MyFile.bin", FileMode.Open, FileAccess.Read, FileShare.Read);
            MyObject obj = (MyObject) formatter.Deserialize(stream);
            stream.Close();

            // Here's the proof
            Console.WriteLine("n1: {0}", obj.n1);
            Console.WriteLine("n2: {0}", obj.n2);
            Console.WriteLine("str: {0}", obj.str);
            Console.Read();
        }
    }

33、数组与序列化

        [STAThread]

         static void Main(string[] args)
        {
            //
            // TODO: 在此处添加代码以启动应用程序
            //
            PurchaseOrder obj = new PurchaseOrder();
            obj.ItemsOrders=new Item[100];
            obj.ItemsOrders[0]=new Item();
            obj.ItemsOrders[0].ItemID="First";
            obj.ItemsOrders[0].ItemPrice=500.25M;

            obj.ItemsOrders[1]=new Item();
            obj.ItemsOrders[1].ItemID="Second";
            obj.ItemsOrders[1].ItemPrice=66.88M;

            IFormatter formatter = new BinaryFormatter();
            Stream stream = new FileStream("MyFile.bin", FileMode.Create, FileAccess.Write, FileShare.None);
            formatter.Serialize(stream, obj);
            stream.Close();            
            
            formatter = new BinaryFormatter();
            stream = new FileStream("MyFile.bin", FileMode.Open, FileAccess.Read, FileShare.Read);
            obj = (PurchaseOrder)formatter.Deserialize(stream);
            stream.Close();
        }
        [Serializable]
        public class PurchaseOrder
        {
            public Item [] ItemsOrders;
        }

        [Serializable]
        public class Item
        {
            public string ItemID;
            public decimal ItemPrice;
        }

34、二进制文件的读写

        private const string FILE_NAME = "Test.dat";
        private void button1_Click(object sender, System.EventArgs e)
        {
            FileStream fs;
            if (File.Exists(FILE_NAME)) 
            {
                fs = new FileStream(FILE_NAME, FileMode.Truncate);
            }
            else
            {
                fs = new FileStream(FILE_NAME, FileMode.CreateNew);
            }
            BinaryWriter w = new BinaryWriter(fs);
            w.Write(DateTime.Now.ToString());
            w.Write(DateTime.Now.Ticks);
            w.Close();
            fs.Close();
        }

        private void button2_Click(object sender, System.EventArgs e)
        {
            FileStream fs;
            fs = new FileStream(FILE_NAME, FileMode.OpenOrCreate);
            BinaryReader r = new BinaryReader(fs);
            MessageBox.Show(r.ReadString()+"\n"+r.ReadInt64().ToString()); 
            r.Close();
            fs.Close();
        }

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