private void cboLoadDrug_SelectedIndexChanged(object sender, EventArgs e) { // selectClass.SelectDrug(textBox5.Text.Trim()); selectClass.SelectDrug(cboLoadDrug.SelectedItem.ToString()); textBox6.Text = selectClass.DrugPrice.ToString(); selectClass.selectDrugQty(cboLoadDrug.SelectedItem.ToString()); getQty.Text = selectClass.drugQty.ToString(); }