private int UpdateVTYT()
        {
            int kq = 0;
            if (gridMaster.SelectedRows.Count != 0)
            {
                DataGridViewRow row = this.gridMaster.SelectedRows[0];
                string MaVTYT = row.Cells["MaVTYT"].Value.ToString();

                frmDanhMucVTYTChiTiet frmChiTiet = new frmDanhMucVTYTChiTiet();
                frmChiTiet.MaDM = MaVTYT;
                frmChiTiet.ShowDialog();
                LoadGridView();
            }
            return kq;
        }
 private int Insert()
 {
     int kq = 0;
     frmDanhMucVTYTChiTiet frmChiTiet = new frmDanhMucVTYTChiTiet();
     frmChiTiet.ShowDialog();
     LoadGridView();
     return kq;
 }