3.Quản lý hóa đơn bán sách (4)

3. Tạo lớp khai báo dữ liệu

- Tạo thư mục Entities (Bấm phải chuột vào dự án và chọn lệnh Add Folder)

- Khai báo lớp Book

Dạng Class Library, trong thư mục Entities (file book.cs), nội dung coding:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Drawing;

using System.Data;

namespace BookShop.Entities

{

    class Book

    {

        private int _bookID;

        public int BookID

        {

            get { return _bookID; }

            set { _bookID = value; }

        }

        private string _bookName;

        public string BookName

        {

            get { return _bookName; }

            set { _bookName = value; }

        }

        private string _author;

        public string Author

        {

            get { return _author; }

            set { _author = value; }

        }

        private int _amount;

        public int Amount

        {

            get { return _amount; }

            set { _amount = value; }

        }

        private int _price;

        public int Price

        {

            get { return _price; }

            set { _price = value; }

        }

        public Book()

        {

        }

        public Book(string bookName, string author, int amount, int price)

        {

            this._bookName = bookName;

            this._author = author;

            this._amount = amount;

            this._price = price;

        }

        public Book(int bookID, string bookName, string author, int amount, int price)

        {

            this._bookID = bookID;

            this._bookName = bookName;

            this._author = author;

            this._amount = amount;

            this._price = price;

        }

        public Book(DataRow row)

        {

            this._bookID = (int)row["BookID"];

            this._bookName = row["BookName"].ToString();

            this._author = row["Author"].ToString();

            this._amount = (int)row["Amount"];

            this._price = (int)row["Price"];

        }

    }

}

- Khai báo lớp Order, dạng Class Library, trong thư mục Entities (file order.cs), nội dung coding:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data;

namespace BookShop.Entities

{

    class Order

    {

        private int _orderID;

        public int OrderID

        {

            get { return _orderID; }

            set { _orderID = value; }

        }

        private string _customerName;

        public string CustomerName

        {

            get { return _customerName; }

            set { _customerName = value; }

        }

        private DateTime _orderDate;

        public DateTime OrderDate

        {

            get { return _orderDate; }

            set { _orderDate = value; }

        }

        private int _total;

        public int Total

        {

            get { return _total; }

            set { _total = value; }

        }

        private List<OrderDetail> _listOrderDetail;

        internal List<OrderDetail> ListOrderDetail

        {

            get { return _listOrderDetail; }

            set { _listOrderDetail = value; }

        }

        public Order()

        {

        }

        public Order(string customerName, DateTime orderDate, int total)

        {

            this._customerName = customerName;

            this._orderDate = orderDate;

            this._total = total;

        }

        public Order(DataRow row)

        {

            this._orderID = (int)row["OrderID"];

            this._customerName = row["CustomerName"].ToString();

            this._orderDate = DateTime.Parse(row["OrderDate"].ToString());

            this._total = (int)row["Total"];

        }

    }

}

- Khai báo lớp OrderDetail, dạng Class Library, trong thư mục Entities (file orderdetail.cs), nội dung coding:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data;

namespace BookShop.Entities

{

    class OrderDetail

    {

        private int _recordID;

        public int RecordID

        {

            get { return _recordID; }

            set { _recordID = value; }

        }

        private int _orderID;

        public int OrderID

        {

            get { return _orderID; }

            set { _orderID = value; }

        }

        private int _bookID;

        public int BookID

        {

            get { return _bookID; }

            set { _bookID = value; }

        }

        private int _quantity;

        public int Quantity

        {

            get { return _quantity; }

            set { _quantity = value; }

        }

        private int _price;

        public int Price

        {

            get { return _price; }

            set { _price = value; }

        }

        private int _totalPrice;

        public int TotalPrice

        {

            get { return _totalPrice; }

            set { _totalPrice = value; }

        }

        public OrderDetail()

        {

        }

        public OrderDetail(DataRow row)

        {

            this._recordID = (int)row["RecordID"];

            this._orderID = (int)row["OrderID"];

            this._bookID = (int)row["BookID"];

            this._quantity = (int)row["Quantity"];

            this._price = (int)row["Price"];

            this._totalPrice = (int)row["TotalPrice"];

        }

    }

}