public Task <ZcycData> GetDataForDate(DateTime date)
{
if (date.Equals(DateTime.Today) && DateTime.Now.Subtract(lastUpdateTime) < cachePeriod)
{
return(Task.FromResult(todayZcycData));
}
var tcs = new TaskCompletionSource <ZcycData>();
var serializer = new XmlSerializer(typeof(IssData));
string downloadingDate = date.ToString("yyyy-MM-dd");
string url = string.Format(DataUrl, downloadingDate);
var zData = new ZcycData
{
Date = date
};
try
{
using XmlReader xmlReader = XmlReader.Create(url); //gets only 500 lines
var issData = (IssData)serializer.Deserialize(xmlReader);
if (issData == null || issData.data == null || issData.data.rows.Length == 0)
{
tcs.TrySetResult(zData);
}
foreach (var item in issData.data.rows)
{
zData.DataRow.Add(new ZcycDataRow
{
Period = item.period,
Value = item.value
});
}
if (date.Equals(DateTime.Today))
{
todayZcycData = zData;
lastUpdateTime = DateTime.Now;
}
tcs.TrySetResult(zData);
}
catch (Exception) // on error return empty data
{
tcs.TrySetResult(zData);
}
return(tcs.Task);
}
public override void Plot(DateTime value)
{
if (MainChart.Series.Any(_ => (DateTime)_.Tag == value))
{
return;
}
IsBusy = true;
Task.Run(async() =>
{
data = await dataManager.GetData(value);
if (data.DataRow.Count > 0)
{
var lineSeries1 = new LineSeries
{
MarkerType = MarkerType.Circle,
MarkerStrokeThickness = 2,
MarkerSize = 2,
LineStyle = LineStyle.Solid,
StrokeThickness = 2,
Title = value.ToShortDateString(),
InterpolationAlgorithm = InterpolationAlgorithms.CanonicalSpline,
Tag = value
};
lineSeries1.MarkerStroke = lineSeries1.Color;
data.DataRow.ForEach(item => { lineSeries1.Points.Add(new DataPoint(item.Period, item.Value)); });
MainChart.Series.Add(lineSeries1);
MainChart.InvalidatePlot(true);
dataManager.Status = string.Empty;
}
else
{
dataManager.Status = $"No data for {value}";
}
IsBusy = false;
});
}
public Task <bool> SaveData(ZcycData data)
{
throw new NotImplementedException();
}
