public StockPriceList GetPrices(string[] tickerList)
{
var priceList = new StockPriceList();
HttpWebRequest req;
HttpWebResponse res;
StreamReader sr;
string strResult;
string fullpath;
var tickers = new StringBuilder();
foreach (string item in tickerList)
{
tickers.Append(item + '+');
}
if (tickers.Length > 1)
{
tickers.Remove(tickers.Length - 1, 1);
}
else
{
return(priceList);
}
fullpath = @"http://quote.yahoo.com/d/quotes.csv?s=" + tickers + "&f=sl1&e=.csv";
try
{
req = (HttpWebRequest)WebRequest.Create(fullpath);
res = (HttpWebResponse)req.GetResponse();
using (sr = new StreamReader(res.GetResponseStream(), Encoding.ASCII))
{
strResult = sr.ReadLine();
while (string.IsNullOrEmpty(strResult) == false)
{
string[] words = strResult.Split(',');
decimal price;
if (Decimal.TryParse(words[1], out price) && price > 0M)
{
string ticker = words[0].Replace("\"", "");
priceList[ticker] = price;
}
strResult = sr.ReadLine();
}
}
}
catch (Exception)
{
}
return(priceList);
}
protected void UpdatePrices()
{
StockPriceList stockPrices = null;
lock (_lockObject)
{
stockPrices = marketFeed.GetPrices(_priceList.Keys.ToArray());
}
foreach (var stockPrice in stockPrices)
{
_priceList[stockPrice.Key].price = stockPrice.Value;
}
OnMarketPricesUpdated();
}
