Force chart to extend the points arrays of series. Only newly added data are processed by this call. Minimums and maximums may change. Call this method always you want to extend the data array without changing old data.This method causes series to query new portion of data through ExtraPoints(NChartSeries^ series) call of their data sources.But you cannot extend the array of points forever, so there is a property PointsHistoryLength that determines the length of history. The difference with UpdateData() is that only newly added points are processed and the array of these points is queried through ExtraPoints(NChartSeries^ series) call of NChartSeriesDataSource.This can save you time by updating large data sets.

public void ExtendData()

Public Sub ExtendData

public:
virtual void ExtendData() sealed