2020-05-25 09:06:21

#Product.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace QuanLiSanPham
{
    class Product
    {
        public string NameProduct { get; set; }
        public string Producer { get; set; }
        public int Price { get; set; }

        public Product() { }
        public Product(string nameProduct,string producer,int price) {
            NameProduct = nameProduct;
            Producer = producer;
            Price = price;
        }
        public void display()
        {
            Console.WriteLine("NameProduct={0},Producer={1},Price={2}",NameProduct,Producer,Price);
        }
        public void input()
        {
            Console.WriteLine("nhap nameproduct");
            NameProduct = Console.ReadLine();
            Console.WriteLine("nhap producer");
            Producer = Console.ReadLine();
            Console.WriteLine("nhap price product");
            Price = Convert.ToInt32(Console.ReadLine());
        }
    }
}

#Program.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace QuanLiSanPham
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.OutputEncoding = Encoding.UTF8;
            List<Product> list = new List<Product>();
            int choose;

            do
            {
                showmenu();
                choose = Convert.ToInt32(Console.ReadLine());
                switch (choose)
                {
                    case 1:
                        inputProduct(list);
                        break;
                    case 2:
                        display(list);
                        break;
                    case 3:
                        list.Sort(new SortByPrice());
                        foreach (var item in list)
                        {
                            item.display();
                        }
                        break;
                    case 4:
                        Console.WriteLine("Thoat thanh cong");
                        break;
                    default:
                        Console.WriteLine("Chon tu 1-4, chon lai di");
                        break;

                }
            } while (choose != 4);
        }
        public static void showmenu()
        {
            Console.WriteLine("1.    Nhập thông tin cho n sản phẩm");
            Console.WriteLine("2.    Hiển thị thông tin vừa nhập");
            Console.WriteLine("3.    Sắp xếp thông tin giảm dần theo giá và hiển thị");
            Console.WriteLine("4.    Thoát.");
            Console.WriteLine("Choose:");
        }

        public static void inputProduct(List<Product> list)
        {
            Console.WriteLine("nhap N san pham");
            int n = Convert.ToInt32(Console.ReadLine());
            for (int i = 0; i < n; i++)
            {
                Product sp = new Product();
                sp.input();
                list.Add(sp);
            }
        }

        public static void display(List<Product> list)
        {
            Console.WriteLine("Danh sach cac san pham ");
            foreach (var item in list)
            {
                item.display();
            }
        }

        
    }
}

#SortByPrice.cs

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Text;

namespace QuanLiSanPham
{
    class SortByPrice : IComparer<Product>
    {
        public int Compare( Product x,Product y)
        {
            return x.Price > y.Price ? -1 : 1;
        }
    }
}