private void btnEditDemoCompetition_Click(object sender, EventArgs e) { int rowindex = dgvDemoCompetition.CurrentRow.Index; int code = Convert.ToInt32(dgvDemoCompetition[0, rowindex].Value); string subtract = dgvDemoCompetition[1, rowindex].Value.ToString(); DEMO_COMPETION cEdit = new DEMO_COMPETION() { demoCompID = code, subtractID = cbSubtractCom.SelectedValue.ToString(), expDate = dtExp.Value, gradeid = Convert.ToInt32(cbDemoKhoi.SelectedValue), iddemotest = Convert.ToInt32(cbDemoDe.SelectedValue), }; TracNghiem.SuaKyThiThu(cEdit); OnLoad(e); }