public FormThueDia(string auth)
 {
     InitializeComponent();
     dbCus        = new CustomerBUL();
     dbRented     = new ListRentedBUL();
     db           = ExpressionMethod.DBDiskRent();
     this.binding = new BindingSource();
     this.auth    = auth;
 }
        private void ThucHienThueDia()
        {
            if (txtMaKH.CheckMa() == false)
            {
                return;
            }
            ThucHienLayDiaDatTruoc();
            int idCustomer = Int32.Parse(txtMaKH.Text.ToString());

            foreach (var item in binding.DataSource as List <DiskInfoRent> )
            {
                ListRented rented = new ListRented {
                    IdDisk = item.IdDisk, IdCustomer = idCustomer, LateFee = item.LateFee, RentalDate = DateTime.Today, ExpectedReturnDate = DateTime.Today.AddDays(item.TimeRented), ActualReturnDate = null, StatusOnBill = null
                };
                if (dbRented.AddListRented(rented) == false)
                {
                    MessageBox.Show("Thuê đĩa thất bại", "Thuê đĩa", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }
            MessageBox.Show("Thuê đĩa thành công", "Thuê đĩa", MessageBoxButtons.OK, MessageBoxIcon.Error);
            db = ExpressionMethod.DBDiskRent();
            binding.DataSource = new List <DiskInfoRent>();
        }