CloverExamplePOS.CloverExamplePOSForm.StoreItems_ItemSelected C# (CSharp) Метод

        private void StoreItems_ItemSelected(object sender, EventArgs e)
        {
            POSItem item = ((StoreItem)((Control)sender).Parent).Item;
            POSLineItem lineItem = Store.CurrentOrder.AddItem(item, 1);

            DisplayLineItem displayLineItem = null;
            posLineItemToDisplayLineItem.TryGetValue(lineItem, out displayLineItem);
            if (displayLineItem == null)
            {
                displayLineItem = DisplayFactory.createDisplayLineItem();
                posLineItemToDisplayLineItem[lineItem] = displayLineItem;
                displayLineItem.quantity = "1";
                displayLineItem.name = lineItem.Item.Name;
                displayLineItem.price = (lineItem.Item.Price / 100.0).ToString("C2");
                DisplayOrder.addDisplayLineItem(displayLineItem);
                UpdateDisplayOrderTotals();
                cloverConnector.LineItemAddedToDisplayOrder(DisplayOrder, displayLineItem);
            }
            else
            {
                displayLineItem.quantity = lineItem.Quantity.ToString();
                UpdateDisplayOrderTotals();
                cloverConnector.ShowDisplayOrder(DisplayOrder);
            }
        }