public KhoDAL()
{
dbContext = new QLBHEntities1();
}
public NhanVienDAL()
{
dbContext = new QLBHEntities1();
}
public HoaDonDAL()
{
dbContext = new QLBHEntities1();
}
public KhachHangDAL()
{
dbContext = new QLBHEntities1();
}
