/// <summary>
/// Load historical data into bars
/// </summary>
/// <param name="bars">Bars object</param>
/// <param name="insStoreID">InsStote Id</param>
/// <param name="date1">First date (without time)</param>
/// <param name="date2">Last date (without time)</param>
/// <returns>Async task</returns>
public Task LoadHistoryAsync(BarRow bars, int insStoreID, DateTime date1, DateTime date2)
{
if (date2 == DateTime.MaxValue)
{
date2 = date2.AddDays(-1);
}
int d1 = StorageLib.ToDbTime(date1.Date);
int d2 = StorageLib.ToDbTime(date2.Date.AddDays(1));
return(Task.Run(() =>
{
var loadedBars = _da.DbContext.Table <BarHistory>()
.Where(b => b.InsStoreID == insStoreID && b.Time >= d1 && b.Time < d2)
.OrderBy(b => b.Time);
bars.SuspendEvents();
foreach (var bar in loadedBars)
{
bars.AddTick(StorageLib.ToDateTime(bar.Time), bar.OpenPrice, 0);
bars.AddTick(StorageLib.ToDateTime(bar.Time), bar.HighPrice, 0);
bars.AddTick(StorageLib.ToDateTime(bar.Time), bar.LowPrice, 0);
bars.AddTick(StorageLib.ToDateTime(bar.Time), bar.ClosePrice, bar.Volume);
}
bars.CloseLastBar();
bars.ResumeEvents();
}));
}
/// <summary>
/// Загрузка исторических данных в BarRow.
/// Наиболее подходящий InsStore определяется автоматически.
/// </summary>
/// <param name="bars">BarRow</param>
/// <param name="insID">Инструмент</param>
/// <param name="date1">Нач дата</param>
/// <param name="date2">Кон дата</param>
/// <param name="insStoreID">Поток данных для загрузки (если null, то поток будет определен автоматически)</param>
/// <returns>Асинхронная задача загрузки. Общее число баров после загрузки.</returns>
public async Task <int> LoadHistoryAsync(BarRow bars, int insID, DateTime date1, DateTime date2, int?insStoreID = null)
{
Instrum instrum = _instrumBL.GetInstrumByID(insID);
if (instrum == null)
{
return(0);
}
if (insStoreID == null)
{
var insStore = GetLoadHistoryInsStore(insID, bars.Timeframe);
if (insStore != null)
{
insStoreID = insStore.InsStoreID;
}
}
if (insStoreID == null)
{
return(0);
}
int k = (int)Math.Pow(10, instrum.Decimals);
var list = await _insStoreDA.GetHistoryAsync(insStoreID.Value, date1, date2);
return(await Task.Run(() =>
{
bars.SuspendEvents();
foreach (var bar in list)
{
DateTime time = StorageLib.ToDateTime(bar.Time);
decimal openPrice = (decimal)bar.OpenPrice / k;
decimal lowPrice = (decimal)(bar.OpenPrice + bar.LowDelta) / k;
decimal highPrice = (decimal)(bar.OpenPrice + bar.HighDelta) / k;
decimal closePrice = (decimal)(bar.OpenPrice + bar.CloseDelta) / k;
bars.AddTick(time, openPrice, 0);
bars.AddTick(time, lowPrice, 0);
bars.AddTick(time, highPrice, 0);
bars.AddTick(time, closePrice, bar.Volume);
}
bars.CloseLastBar();
bars.ResumeEvents();
return bars.Count;
}));
}
