private void frmPhieuThuePhong_Load(object sender, EventArgs e) { txtMaPhong.Text = room; txtLoaiPhong.Text = roomtype; cmbLoaiKhachHang.DataSource = CustomerBUS.LayDSLoaiKhach(); cmbLoaiKhachHang.ValueMember = "MaLoaiKhach"; cmbLoaiKhachHang.DisplayMember = "LoaiKhach"; #region List <ParameDTO> lstMaxCus = RoomBUS.SoLuongKhachToiDa(); maxCus = lstMaxCus[0].SLKhachToiDa; #endregion }