private void btnLoadBook_Click(object sender, EventArgs e) { book = BookManage.getBookByISBN(txtISBN.Text); if (book != null) { BookInfo(); } }
private void lvSale_Click(object sender, EventArgs e) { this.txtISBN.Text = lvSale.SelectedItems[0].Text; //this.nudCount.Value = int.Parse(lvSale.SelectedItems[0].Tag.ToString()); int id = (int)lvSale.SelectedItems[0].Tag; foreach (SaleItems item in items) { if (id == item.Id) { this.nudCount.Value = item.Count; break; } } book = BookManage.getBookByISBN(txtISBN.Text); if (book != null) { BookInfo(); } }
private void btnAdd_Click(object sender, EventArgs e) { book = BookManage.getBookByISBN(txtISBN.Text); if (book != null) { if (this.nudCount.Value > book.Stock) { MessageBox.Show("库存不足!"); } else { BookInfo(); addSaleItem(); loadlvSale(); this.nudCount.Value = 1; this.txtISBN.Text = ""; } } else { MessageBox.Show("ISBN码错误!"); } }