public void sualophocphan(string maLop, string phongHoc, string Thu, int TuTiet, int DenTiet, int soLuong, string tgBatDau, string tgKetThuc)
{
ql.editlhp(maLop, phongHoc, Thu, TuTiet, DenTiet, soLuong, DateTime.Parse(tgBatDau), DateTime.Parse(tgKetThuc));
}