Hi!
I switched to Version 2014.1 (full version number: 14.4.11.12), and suddenly I got problems with this code (which worked perfectly in 2012.1:
selectedSeries.Tags[cntSelected] = dataRow;
It throws a null reference exception.
I changed the line to
selectedSeries.Tags.Add(cntSelected, dataRow);
then it worked, but when I want to redraw my chart and call
selectedSeries.ClearDataPoints(); I again get a null reference exception. When I don't set a Tag at all, everything works fine.
Here's the complete code which sets the chart (I left out some irrelevant parts):
        private void SetChart(bool setCostFunction)
        {
            selectedSeries.ClearDataPoints();
            unselectedSeries.ClearDataPoints();

            costfunctionSeries.ClearDataPoints();
            lowerConfidenceIntervalSeries.ClearDataPoints();
            upperConfidenceIntervalSeries.ClearDataPoints();

            double maxXVal = Double.MinValue;

            //Add all Baggerungen that are in the list:
            List<double> xVals = new List<double>();
            List<double> yVals = new List<double>();

            int cntSelected = 0;
            int cntUnSelected = 0;

            foreach (DataGridViewRow row in dgvOverview.Rows)
            {
                //Only add if nettosumme and Kubatur are present!
                DataRowView drv = (DataRowView)row.DataBoundItem;
                var dataRow = (WAMSDataSet.VwBaggerungOverviewRow)drv.Row;

                if (!dataRow.IsKubaturNull() && !dataRow.IsNettosummeNull())
                {
                    //Add to Lists:
                    xVals.Add(dataRow.Kubatur);
                    yVals.Add(dataRow.Nettosumme);

                    if (maxXVal < dataRow.Kubatur)
                    {
                        maxXVal = dataRow.Kubatur;
                    }

                    NDataPoint dataPoint = new NDataPoint(dataRow.Kubatur, dataRow.Nettosumme);
                   
                    //Is the row selected?
                    if (dataRow.Auswahl)
                    {
                        selectedSeries.AddDataPoint(dataPoint);
                        //Store ID as Tag!
                        //DOES NOT WORK ANYMORE!!!!
                        //selectedSeries.Tags.Add(cntSelected, dataRow);
                        //selectedSeries.Tags[cntSelected] = dataRow;
                        cntSelected++;
                    }
                    else
                    {
                        unselectedSeries.AddDataPoint(dataPoint);
                        //Store ID as Tag!
                        //DOES NOT WORK ANYMORE!!!!
                        //unselectedSeries.Tags[cntUnSelected] = dataRow;
                        //unselectedSeries.Tags.Add(cntUnSelected, dataRow);
                        cntUnSelected++;
                    }
                }
            }
    chartControl.Refresh();
}