private void Form_Order_Load(object sender, EventArgs e)
 {
     btnThem.Enabled      = false;
     btnGiam.Enabled      = false;
     btnInPhieu.Enabled   = false;
     btnThanhToan.Enabled = false;
     daTableMenu          = spBus.GetThongTinMenu();
     foreach (DataRow row in daTableMenu.Rows)
     {
         ListViewItem item = new ListViewItem(row["Ten"].ToString());
         item.SubItems.Add(row["DonVi"].ToString());
         item.SubItems.Add(row["GiaBan"].ToString());
         item.SubItems.Add(row["MaSP"].ToString());
         lstMenu.Items.Add(item);
     }
     foreach (Button bt in tabPage2.Controls)
     {
         int id = int.Parse(bt.Name.Substring(6));
         tinhTrangBan = Convert.ToBoolean(banBus.GetTinhTrangBanByIDBan(id)["TinhTrang"]);
         if (tinhTrangBan == false)
         {
             bt.BackColor = Color.Green;
         }
         else
         {
             bt.BackColor = Color.Red;
         }
     }
 }
 private void Form_QuanLyHangHoa_Load(object sender, EventArgs e)
 {
     dt = product.GetThongTinMenu();
     dgvSanPham.DataSource = dt;
 }