private void Button_Click(object sender, RoutedEventArgs e)
        {
            string ID    = this.IDS.Text.Trim();
            string name  = this.bookname.Text.Trim();
            string cbs   = this.cbs.Text.Trim();
            string price = this.price.Text.Trim();
            string kc    = this.kc.Text.Trim();

            if (ID == "" || name == "" || cbs == "" || price == "" || kc == "")
            {
                // 有信息未填
                MessageBox.Show("所有信息不能为空!");
                return;
            }
            int     count;
            int     id       = int.Parse(ID);
            decimal prices   = decimal.Parse(price);
            int     store    = int.Parse(kc);
            BookBLL bookball = new BookBLL();

            count = bookball.BookDelete(id, name, cbs, prices, store);
            if (count == 0)
            {
                MessageBox.Show("查无此书!");
            }
            else
            {
                MessageBoxResult boxResult = MessageBox.Show("数据删除成功!", "提示:", MessageBoxButton.YesNo, MessageBoxImage.Information, MessageBoxResult.No);
                if (boxResult == MessageBoxResult.Yes)
                {
                    BookWindow1 BookWindow = new BookWindow1();
                    BookWindow.WindowStartupLocation = WindowStartupLocation.Manual;
                    BookWindow.Left = this.Left;
                    BookWindow.Top  = this.Top;
                    BookWindow.Show();
                    this.Close();
                }
            }
        }