Link Video Bai Giang

File -> C#
- File Text:
- File nhi phan (binary) -> Luu object | list object -> file

#Program.cs

using System;
using System.Collections.Generic;
using System.IO;

namespace Lesson04
{
    class Program
    {
        static void Main(string[] args)
        {
            //Test01();
            //Test02();
            Test03();
        }

        static void Test03()
        {
            List<Book> books = new List<Book>();

            //deserialize
            using (Stream stream = File.Open(@"books.dat", FileMode.Open))
            {
                var bformatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();

                books = (List<Book>)bformatter.Deserialize(stream);
            }

            foreach(Book book in books)
            {
                Console.WriteLine(book.GetFileLine());
            }
        }

        static void Test02()
        {
            List<Book> books = new List<Book>();
            books.Add(new Book("A1", 1));
            books.Add(new Book("A2", 10));
            books.Add(new Book("A3", 6));

            //Save
            //serialize
            using (Stream stream = File.Open(@"books.dat", FileMode.Create))
            {
                var bformatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();

                bformatter.Serialize(stream, books);
            }
        }

        /**
         * FILE Text
         */
        static void Test01()
        {
            string content = "Sinh vien Aptech";
            //Luu du lieu
            System.IO.File.WriteAllText(@"test01.txt", content);

            //Luu mang vao file
            string[] lines = { "line 1", "line 2", "line 3" };
            System.IO.File.WriteAllLines(@"test02.txt", lines);

            //Luu mang object -> file
            List<Book> books = new List<Book>();
            books.Add(new Book("A1", 1));
            books.Add(new Book("A2", 10));
            books.Add(new Book("A3", 6));

            //C1: Chuyen books -> string
            string data = "";
            foreach(Book book in books)
            {
                data += book.GetFileLine();
            }
            System.IO.File.WriteAllText(@"test03.txt", data);

            //Doc noi dung
            content = System.IO.File.ReadAllText(@"test03.txt");
            Console.WriteLine(content);
        }
    }
}

#Book.cs

using System;
namespace Lesson04
{
    [Serializable]
    public class Book
    {
        public string Name { get; set; }
        public float Price { get; set; }

        public Book()
        {
        }

        public Book(string name, float price)
        {
            Name = name;
            Price = price;
        }

        public string GetFileLine()
        {
            return Name + "," + Price + "\n";
        }
    }
}