private List <YahooHistoricalPriceData> GetHistoricalPriceData(string yahooStockCode, HistoryType historyType, DateTime?startDate, DateTime?endDate)
{
var historicalDataCsv = GetHistoricalDataAsCsv(yahooStockCode, historyType, startDate, endDate);
var historicalPriceData = new List <YahooHistoricalPriceData>();
foreach (var line in historicalDataCsv.Split('\n').Skip(1))
{
if (string.IsNullOrEmpty(line))
{
continue;
}
var values = line.Split(',');
var newPriceData = new YahooHistoricalPriceData
{
Date = DateTime.Parse(values[0], CultureInfo.InvariantCulture),
Open = decimal.Parse(values[1], CultureInfo.InvariantCulture),
High = decimal.Parse(values[2], CultureInfo.InvariantCulture),
Low = decimal.Parse(values[3], CultureInfo.InvariantCulture),
Close = decimal.Parse(values[4], CultureInfo.InvariantCulture),
Volume = long.Parse(values[5], CultureInfo.InvariantCulture),
AdjClose = decimal.Parse(values[6], CultureInfo.InvariantCulture)
};
historicalPriceData.Add(newPriceData);
}
return(historicalPriceData);
}
private List <YahooHistoricalPriceData> GetHistoricalPriceData(string yahooStockCode, DateTime?startDate, DateTime?endDate, HistoryType historyType)
{
var dateRangeOption = string.Empty;
var addDateRangeOption = historyType == HistoryType.Day && startDate.HasValue && endDate.HasValue;
if (addDateRangeOption)
{
var startDateValue = startDate.Value;
var endDateValue = endDate.Value;
//date range must be at least 30 days or the API will return a 404 error
var dateRangeIsSmallerThenMinimum = startDateValue > endDateValue.AddDays(MinimumDateRangeDays);
if (dateRangeIsSmallerThenMinimum)
{
startDateValue = endDateValue.AddDays(MinimumDateRangeDays);
}
dateRangeOption = GetDateRangeOption(startDateValue, endDateValue);
}
var historyTypeOption = GetHistoryType(historyType);
var options = $"{dateRangeOption}{historyTypeOption}";
var historicalDataCsv = YahooApiRequest(yahooStockCode, options);
var historicalPriceData = new List <YahooHistoricalPriceData>();
foreach (var line in historicalDataCsv.Split('\n').Skip(1))
{
if (string.IsNullOrEmpty(line))
{
continue;
}
var values = line.Split(',');
var newPriceData = new YahooHistoricalPriceData
{
Date = DateTime.Parse(values[0]),
Open = decimal.Parse(values[1]),
High = decimal.Parse(values[2]),
Low = decimal.Parse(values[3]),
Close = decimal.Parse(values[4]),
Volume = int.Parse(values[5]),
AdjClose = decimal.Parse(values[6])
};
historicalPriceData.Add(newPriceData);
}
return(historicalPriceData);
}