MTP2.0_CSharp/Muchinfo.Common/Fx4.0/Mucinfo.NewWinChart/Easychart.Finance/Easychart.Finance.DataProvider/YahooDataManager.cs

namespace Easychart.Finance.DataProvider
{
    using Easychart.Finance;
    using System;
    using System.Net;
    using System.Text;

    public class YahooDataManager : YahooCSVDataManager
    {
        public static string DownloadRealtimeFromYahoo(string Code, string Param)
        {
            string str = "";
            string str2 = Code.ToLower();
            Encoding encoding = Encoding.ASCII;
            byte[] bytes = FormulaHelper.DownloadData(string.Format("http://" + str + "finance.yahoo.com/d/quotes.csv?s=" + Code + "&f=" + Param, Code));
            return encoding.GetString(bytes);
        }

        public override IDataProvider GetData(string Code, int Count)
        {
            DateTime date;
            IDataProvider provider2;
            if (Count > 0x6815)
            {
                Count = 0x6815;
                date = new DateTime(0x78a, 1, 1);
            }
            else
            {
                date = DateTime.Now.AddDays((double) -Count).Date;
            }
            DateTime now = DateTime.Now;
            if (base.EndTime != DateTime.MinValue)
            {
                now = base.EndTime.AddDays(1.0);
            }
            if (base.StartTime != DateTime.MinValue)
            {
                date = base.StartTime;
            }
            string format = "http://table.finance.yahoo.com/table.csv?s={0}&a={1}&b={2}&c={3}&d={4}&e={5}&f={6}&g=d&ignore=.csv";
            string uRL = string.Format(format, new object[] { Code, date.Month - 1, date.Day, date.Year, now.Month - 1, now.Day, now.Year });
            try
            {
                byte[] data = FormulaHelper.DownloadData(uRL);
                CommonDataProvider cdp = base.LoadYahooCSV(data);
                this.SetStrings(cdp, Code);
                provider2 = cdp;
            }
            catch (WebException)
            {
                throw new Exception("Symbol " + Code + " not found!");
            }
            catch (Exception exception)
            {
                throw new Exception("Invalid data format!" + Code + ";" + exception.Message);
            }
            return provider2;
        }

        public static string[] GetStockName(string Code)
        {
            string[] strArray = new string[0];
            string str = DownloadRealtimeFromYahoo(Code, "snx");
            if (str != null)
            {
                strArray = str.Split(new char[] { ',' });
                for (int i = 0; i < 3; i++)
                {
                    strArray[i] = strArray[i].Trim();
                    if (strArray[i].Length > 2)
                    {
                        strArray[i] = strArray[i].Substring(1, strArray[i].Length - 2);
                        strArray[i] = strArray[i].Trim();
                    }
                }
            }
            return strArray;
        }

        public override void SetStrings(CommonDataProvider cdp, string Code)
        {
            cdp.SetStringData("Code", Code);
        }

        public static string TryDownloadRealtimeFromYahoo(string Code, string Param)
        {
            for (int i = 0; i < 5; i++)
            {
                try
                {
                    return DownloadRealtimeFromYahoo(Code, Param);
                }
                catch
                {
                }
            }
            return null;
        }
    }
}