public HoaDonBan()
{
chiTiet = new ChiTietHDB();
id = 0;
ngayLap = DateTime.Now;
idNV = 0;
idKH = 0;
khuyenMai = new KhuyenMai(0);
thanhToan = 0;
trangThai = 0;
}
public HoaDonBan(int id)
{
chiTiet = new ChiTietHDB(id);
this.id = id;
DataTable dt = HoaDonBanControl.layThongTinHDB(id);
idKH = dt.Rows[0]["MaKH"].ToString().Length == 0 ? 0 : Convert.ToInt32(dt.Rows[0]["MaKH"].ToString());
idNV = dt.Rows[0]["MaNV"].ToString().Length == 0 ? 0 : Convert.ToInt32(dt.Rows[0]["MaNV"].ToString());
trangThai = Convert.ToInt32(dt.Rows[0]["TrangThai"].ToString());
khuyenMai = new KhuyenMai(dt.Rows[0]["MaKM"].ToString().Length == 0 ? 0 : Convert.ToInt32(dt.Rows[0]["MaKM"].ToString()));
thanhToan = double.Parse(dt.Rows[0]["ThanhToan"].ToString());
ngayLap = DateTime.Parse(dt.Rows[0]["NgayLap"].ToString());
}
