private void dataGridViewControl1_CellClick(object sender, DataGridViewCellEventArgs e) { try { ath_grp_id = dataGridViewControl1["ATH_GRP_ID", e.RowIndex].Value.ToInt(); ath_grp_name = dataGridViewControl1["ATH_GRP_NAME", e.RowIndex].Value.ToString(); ProgAthDt = authorityService.GetProgramAths(ath_grp_id); dataGridViewControl2.DataSource = ProgAthDt; } catch (Exception err) { MessageBox.Show(err.Message); } }