thank you!

Hi Alexander,

That's a bit tricky as the legend item index is not exposed from the hit test result - you need to obtain the parent collection and find the item there:

  private void Form1_Load(object sender, EventArgs e)
  {
   NChart chart = nChartControl1.Charts[0];

   for (int i = 0; i < 10; i++)
   {
    NBarSeries bar = new NBarSeries();
    bar.Values.Add(10);
    chart.Series.Add(bar);
   }

   nChartControl1.MouseDown += new MouseEventHandler(nChartControl1_MouseDown);
  }

  void nChartControl1_MouseDown(object sender, MouseEventArgs e)
  {
   NHitTestResult result = nChartControl1.HitTest(e.X, e.Y);

   if (result.ChartElement == ChartElement.LegendDataItem)
   {
    NLegendItemCellData cell = result.LegendDataItem;

    NChartElementComposite parent = (NChartElementComposite)cell.ParentNode;
    int index = parent.IndexOfChild(cell);

    MessageBox.Show("Legend data item [" + index.ToString() + "]");
   }
  }

Best Regards,
Nevron Support Team

I need to detect what legend data item was clicked by mouse. Legend panel is in automatic mode. How to do this?