private void UpdateChart(DataSet dataSet)
{
if (dataSet.Enabled)
{
using (var _Db = _DbContextFactoryMethod.Invoke())
{
var data = dataSet.QueryData(_Db, CurrentUsageHistorySettings.MinDate, CurrentUsageHistorySettings.MaxDate);
if (data.Count() > 0)
{
if (dataSet.Series == null)
{
var series = new LineSeries()
{
Title = dataSet.Name,
Values = new ChartValues <DateModel>(data),
};
ChartSeries.Add(series);
dataSet.Series = series;
}
else
{
var currentValues = dataSet.Series.Values.Cast <DateModel>().ToList();
var toAddFront = data.TakeWhile(x => x.DateTime < currentValues.First().DateTime);
var toRemoveFront = currentValues.TakeWhile(x => x.DateTime < data.First().DateTime);
var toAddBack = data.Reverse().TakeWhile(x => x.DateTime > currentValues.Last().DateTime).Reverse();
var toRemoveBack = currentValues.Reverse <DateModel>().TakeWhile(x => x.DateTime > data.Last().DateTime).Reverse();
for (int i = 0; i < toRemoveFront.Count(); i++)
{
dataSet.Series.Values.RemoveAt(0);
}
for (int i = 0; i < toRemoveBack.Count(); i++)
{
dataSet.Series.Values.RemoveAt(dataSet.Series.Values.Count - 1);
}
foreach (var value in toAddFront.Reverse())
{
dataSet.Series.Values.Insert(0, value);
}
foreach (var value in toAddBack)
{
dataSet.Series.Values.Add(value);
}
}
}
}
}
else
{
var series = dataSet.Series;
if (series != null)
{
ChartSeries.Remove(series);
}
dataSet.Series = null;
}
}