IEnumerable<Price> IMarketPriceRepository.FetchPrices(IEnumerable<Item> items, SolarSystem system)
        {
            string urlData = "";
            foreach (Item item in items)
            {
                urlData += "typeid=" + item.ApiId + "&";
            }
            urlData += "usesystem=" + system.ApiId;

            XDocument doc = XDocument.Load(String.Format(String.Format(_priceURL, urlData)));
            IEnumerable<XElement> itemElements = doc.Element("evec_api").Element("marketstat").Elements("type");
            IList<Price> prices = new List<Price>();
            foreach (XElement itemElement in itemElements)
            {
                string itemApi = itemElement.Attribute("id").Value;
                Item currentItem = items.Single(i => i.ApiId.Equals(itemApi));
                Price price = new Price
                {
                    Item = currentItem,
                    SolarSystem = system,
                    Buy = Double.Parse(itemElement.Element("buy").Element("max").Value, CultureInfo.InvariantCulture),
                    Sell = Double.Parse(itemElement.Element("sell").Element("min").Value, CultureInfo.InvariantCulture),
                    Date = DateTime.Today
                };
                prices.Add(price);
            }
            return prices.AsEnumerable();
        }
 Price IMarketPriceRepository.FetchPrice(Item item, SolarSystem system)
 {
     string urlData = String.Format("typeid={0}&usesystem={1}", item.ApiId, system.ApiId);
     XDocument doc = XDocument.Load(String.Format(_priceURL, urlData));
     XElement itemElement = doc.Element("evec_api").Element("marketstat").Elements("type").First();
     Price price = new Price
     {
         Item = item,
         SolarSystem = system,
         Buy = Double.Parse(itemElement.Element("buy").Element("max").Value, CultureInfo.InvariantCulture),
         Sell = Double.Parse(itemElement.Element("sell").Element("min").Value, CultureInfo.InvariantCulture),
         Date = DateTime.Today
     };
     return price;
 }
 public void UpdatePrice(Price price, string PriceMode)
 {
     int id = Int32.Parse(price.Item.ApiId);
     customPrice customPrice = this.CustomPrices.SingleOrDefault(cp => cp.typeID == id);
     if (customPrice == null)
     {
         customPrice = new customPrice();
         customPrice.typeID = Int32.Parse(price.Item.ApiId);
         customPrice.price = price.GetPrice(PriceMode);
         customPrice.priceDate = price.Date;
         this.CustomPrices.Add(customPrice);
     }
     else
     {
         customPrice.price = price.GetPrice(PriceMode);
         customPrice.priceDate = price.Date;
     }
 }