public void LoadForm(string maHD, string maLop)
 {
     labelTenHoatDong.Text = HoatDongNgoaiKhoaBLL.GetTenHoatDong(maHD);
     this.maLop            = maLop;
     this.maHD             = maHD;
     LoadDataGridView();
 }
 public void LoadForm()
 {
     SetMaHD();
     labelTenHoatDong.Text = HoatDongNgoaiKhoaBLL.GetTenHoatDong(maHD);
     SetMaHD();
     if (maHD != "")
     {
         LoadDataGridView();
     }
 }