public void LoadLop()
{
var list = LopService.getLopHP();
dataGridViewLop.AutoGenerateColumns = false;
bdsLop.DataSource = list;
dataGridViewLop.DataSource = bdsLop;
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
MonHoc monSelected = (MonHoc)cbMH.SelectedItem;
var list = LopService.getLopHP(monSelected.MaMonHoc);
bdsLop.DataSource = list;
dataGridViewLop.DataSource = bdsLop;
txtMaLopHP.Text = monSelected.TenMonHoc;
}