protected override object BuildGroupKey(DateTime time)
{
var dateKey = new ChartItemDateKey
{
Year = time.Year,
Month = time.Month
};
return(dateKey);
}
protected abstract DateTime GetDateTimeFromGroupKey(ChartItemDateKey groupKey);
protected override DateTime GetDateTimeFromGroupKey(ChartItemDateKey dateKey)
{
var dateTime = new DateTime(dateKey.Year, dateKey.Month, dateKey.Day);
return(dateTime);
}