Spread for ASP.NET 8.0 Product Documentation
Creating a Polar Plot

You can create a polar plot chart using code or the designer. The following image shows a Polar Plot type chart.

Polar Plot Chart

For details on the API, see the PolarPlotArea class.

The following classes are also available:

Using Code

  1. Use the PolarPointSeries class to add data to a Chart control.
  2. Use the PolarPlotArea class to create the plot area.
  3. Set the location and size of the plot area.
  4. Add the series to the plot area.
  5. Create a label and legend for the chart.
  6. Create a chart model and add the plot area, label, and legend to the model.
  7. Create a chart and add the chart model to it.
  8. Add the chart to the Spread control.

Example

The following example demonstrates using unbound data to create a polar point series chart.

C#
Copy Code
PolarPointSeries series0 = new PolarPointSeries();
series0.SeriesName = "Series 0";
series0.XValues.Add(0.0);
series0.XValues.Add(45.0);
series0.XValues.Add(90.0);
series0.XValues.Add(180.0);
series0.XValues.Add(270.0);
series0.YValues.Add(1.0);
series0.YValues.Add(2.0);
series0.YValues.Add(3.0);
series0.YValues.Add(4.0);
series0.YValues.Add(5.0);
PolarPointSeries series1 = new PolarPointSeries();
series1.SeriesName = "Series 1";
series1.XValues.Add(0.0);
series1.XValues.Add(45.0);
series1.XValues.Add(90.0);
series1.XValues.Add(180.0);
series1.XValues.Add(270.0);
series1.YValues.Add(2.0);
series1.YValues.Add(3.0);
series1.YValues.Add(4.0);
series1.YValues.Add(5.0);
series1.YValues.Add(6.0);
PolarPlotArea plotArea = new PolarPlotArea();
plotArea.Location = new PointF(0.2f, 0.2f);
plotArea.Size = new SizeF(0.6f, 0.6f);
plotArea.Series.Add(series0);
plotArea.Series.Add(series1);
LabelArea label = new LabelArea();
label.Text = "Polar Point Chart";
label.Location = new PointF(0.5f, 0.02f);
label.AlignmentX = 0.5f;
label.AlignmentY = 0.0f;
LegendArea legend = new LegendArea();
legend.Location = new PointF(0.98f, 0.5f);
legend.AlignmentX = 1.0f;
legend.AlignmentY = 0.5f;
ChartModel model = new ChartModel();
model.LabelAreas.Add(label);
model.LegendAreas.Add(legend);
model.PlotAreas.Add(plotArea);
FarPoint.Web.Spread.Chart.SpreadChart chart = new FarPoint.Web.Spread.Chart.SpreadChart();
chart.Model = model;
FpSpread1.Sheets[0].Charts.Add(chart);
VB
Copy Code
Dim series0 As New PolarPointSeries()
series0.SeriesName = "Series 0"
series0.XValues.Add(0.0)
series0.XValues.Add(45.0)
series0.XValues.Add(90.0)
series0.XValues.Add(180.0)
series0.XValues.Add(270.0)
series0.YValues.Add(1.0)
series0.YValues.Add(2.0)
series0.YValues.Add(3.0)
series0.YValues.Add(4.0)
series0.YValues.Add(5.0)
Dim series1 As New PolarPointSeries()
series1.SeriesName = "Series 1"
series1.XValues.Add(0.0)
series1.XValues.Add(45.0)
series1.XValues.Add(90.0)
series1.XValues.Add(180.0)
series1.XValues.Add(270.0)
series1.YValues.Add(2.0)
series1.YValues.Add(3.0)
series1.YValues.Add(4.0)
series1.YValues.Add(5.0)
series1.YValues.Add(6.0)
Dim plotArea As New PolarPlotArea()
plotArea.Location = New PointF(0.2F, 0.2F)
plotArea.Size = New SizeF(0.6F, 0.6F)
plotArea.Series.Add(series0)
plotArea.Series.Add(series1)
Dim label As New LabelArea()
label.Text = "Polar Point Chart"
label.Location = New PointF(0.5F, 0.02F)
label.AlignmentX = 0.5F
label.AlignmentY = 0F
Dim legend As New LegendArea()
legend.Location = New PointF(0.98F, 0.5F)
legend.AlignmentX = 1F
legend.AlignmentY = 0.5F
Dim model As New ChartModel()
model.LabelAreas.Add(label)
model.LegendAreas.Add(legend)
model.PlotAreas.Add(plotArea)
Dim chart As New FarPoint.Web.Spread.Chart.SpreadChart()
chart.Model = model
FpSpread1.Sheets(0).Charts.Add(chart)

Using the Chart Designer

  1. Select the PlotArea Collection editor.
  2. Click the drop-down button on the right side of the Add button (lower, left side of dialog).
  3. Select the PolarPlotArea option and set properties as needed.
  4. Select Apply and OK to close the Chart Designer.
See Also

 

 


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