Are there any plans to add this type of chart; i.e. a pie chart that displays two or more sets of data as rings within the full pie?

Thanks

Kevin

Hi Kevin,

Currently a pie chart can display only a single series. We have plans to implement support for multiple pie series for "doughnut" charts, but at this point it's not a top priority.

It is possible to emulate this feature using two pie charts (please see the code below). This is a workaround though, so it has some limitations - first it doesn't work for real 3D charts (works for 2D and for 3D in ortho 2D projection), and second - cannot be used along with the non-overlapping pie labels mode.

      private void Form1_Load(object sender, EventArgs e)
      {
         nChartControl1.Panels.Clear();

         // first chart (outer)
         NPieChart pieChart1 = new NPieChart();
         nChartControl1.Charts.Add(pieChart1);
         NPieSeries series1 = new NPieSeries();
         pieChart1.Series.Add(series1);
         series1.LabelMode = PieLabelMode.Center;
         series1.Values.AddRange(new double[]{10, 20, 15});
         series1.PieStyle = PieStyle.Ring;
         series1.InnerRadius = new NLength(30, NRelativeUnit.ParentPercentage);
         series1.Radius = new NLength(50, NRelativeUnit.ParentPercentage);
         series1.FillStyles[0] = new NColorFillStyle(Color.IndianRed);
         series1.FillStyles[1] = new NColorFillStyle(Color.Goldenrod);
         series1.FillStyles[2] = new NColorFillStyle(Color.OliveDrab);

         // second chart (inner)
         NPieChart pieChart2 = new NPieChart();
         nChartControl1.Charts.Add(pieChart2);
         NPieSeries series2 = new NPieSeries();
         pieChart2.Series.Add(series2);
         series2.LabelMode = PieLabelMode.Center;
         series2.Values.AddRange(new double[] { 7, 4, 8 });
         series2.PieStyle = PieStyle.Ring;
         series2.InnerRadius = new NLength(10, NRelativeUnit.ParentPercentage);
         series2.Radius = new NLength(30, NRelativeUnit.ParentPercentage);
         series2.FillStyles[0] = new NColorFillStyle(Color.IndianRed);
         series2.FillStyles[1] = new NColorFillStyle(Color.Goldenrod);
         series2.FillStyles[2] = new NColorFillStyle(Color.OliveDrab);
      }

Best Regards,
Nevron Support Team