private void DataBind()
{
ds = db.getLop();
dgvquanlylop.DataSource = ds.Tables[0];
txtmalop.DataBindings.Clear();
txttenlop.DataBindings.Clear();
txtsiso.DataBindings.Clear();
txtmakhoahoc.DataBindings.Clear();
txtmanganh.DataBindings.Clear();
txtmalop.DataBindings.Add("Text", ds.Tables[0], "MaLop");
txttenlop.DataBindings.Add("Text", ds.Tables[0], "TenLop");
txtsiso.DataBindings.Add("Text", ds.Tables[0], "SiSo");
txtmakhoahoc.DataBindings.Add("Text", ds.Tables[0], "MaKhoaHoc");
txtmanganh.DataBindings.Add("Text", ds.Tables[0], "MaNganh");
}
