protected void LinkButtonAddItemToShopClick(object sender, EventArgs e)
 {
     Log.Debug("Add Item To Shop");
     DataBase dataBase = new DataBase();
     string selectedItem = dropDownListManageShopItemsBodyInputItems.SelectedValue;
     Item item = dataBase.GetItem(new Guid(selectedItem));
     if (item == null)
     {
         return;
     }
     string selectedShop = dropDownListManageShopItemsBodyInputShops.SelectedValue;
     Shop shop = dataBase.GetShop(selectedShop);
     if (shop == null)
     {
         return;
     }
     string gross = textBoxManageShopItemsBodyInputPriceGross.Text.Trim();
     string net = textBoxManageShopItemsBodyInputPriceNet.Text.Trim();
     if (gross.Length < 1 || net.Length < 1)
     {
         Log.WarnFormat("Price not in correct format! Gross='{0}', Net='{1}'", gross, net);
         return;
     }
     Double priceGross = Double.Parse(gross);
     Double priceNet = Double.Parse(net);
     int numberOfItems = Misc.String2Number(textBoxManageShopItemsBodyInputNumberOfItems.Text.Trim());
     Price price = new Price(priceGross, priceNet) {ItemId = item.UniqueId, ShopId = shop.Id};
     if (!dataBase.InsertPrice(price))
     {
         return;
     }
     ShopItem shopItem = new ShopItem
         {
             ItemId = item.UniqueId,
             ShopId = shop.Id,
             PriceId = price.Id,
             DateTime = new DateTime(DateTime.Now.Ticks),
         }.SetNumberOfItems(numberOfItems);
     dataBase.InsertShopItem(shopItem);
     Populate();
 }