private void LoadReceiptType() { try { ReceiptBLL receiptBLL = new ReceiptBLL(); cbxTypereceipt.DataSource = receiptBLL.loadreceipttype(); cbxTypereceipt.DisplayMember = "nametype"; cbxTypereceipt.ValueMember = "idtype"; } catch (Exception ex) { MessageBox.Show(ex.Message, "ERROR"); } }