private void chkActSar_CheckedChanged(object sender, EventArgs e) { try { if (chkActSar.Checked) { cmbSaraya.Enabled = true; if (code == "B") { DataTable dt = ClassQuotation.sp_fillSaraQout((int)cmbBrigade.SelectedValue, (int)cmbBattalion.SelectedValue); cmbSaraya.DataSource = dt; cmbSaraya.DisplayMember = "Saraya_name"; cmbSaraya.ValueMember = "Saraya_id"; } } else { cmbSaraya.Enabled = false; } } catch (Exception ex) { chkActSar.Checked = false; MessageBox.Show("Select Battalion First"); } }