?using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using BookManager;
using System.Reflection;

namespace BookPOS
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Book book;
        POS pos;
        private void button1_Click(object sender, EventArgs e)
        {
            object o=  Enum.Parse(typeof(BookType), comboBox1.Text);
            book = new Book(textBox1.Text,double.Parse(textBox2.Text),int.Parse(textBox3.Text),(BookType)o);
            pos = new POS();
            
            Assembly ass = Assembly.Load("BookManager");
            object ob = ass.CreateInstance("BookManager." + book.Type + "Discount");
            IDiscount id = ob as IDiscount;
            if (pos.Scan(book, id))
                MessageBox.Show("打折后價格：" + book.SellPrice + ",售出后庫存：" + book.Storage + "。");
            else
                MessageBox.Show("無庫存");
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string[] names=Enum.GetNames(typeof(BookType));
            comboBox1.DataSource = names;
            comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
        }

    }
}