Pie Chart

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Short Description

The Pie Chart is represented by the Pie3DSeriesView object, which belongs to Pie and Donut Series Views. This view is useful when it's necessary to compare the percentage values of different point arguments in the same series, and to illustrate these values as easy to understand pie slices. In addition, the 3D look makes it possible to rotate a chart to position pie slices in an attractive and easy-to-understand way.

A Pie chart is shown in the image below.

SeriesView_Pie3DSeries.png

Chart Type Characteristics

The table below lists the main characteristics of this chart type.

Feature Value
Series View type Pie3DSeriesView
Diagram type SimpleDiagram3D
Number of arguments per series point 1
Number of values per series point 1
NOTE

For information on which chart types can be combined with the Pie Chart, refer to the Series Views Compatibility document.

Example

The following example demonstrates how to create a ChartControl with a series of the Pie3DSeriesView type, set its general properties, and add this chart to a form at runtime. Before proceeding with this example, first create a Windows Forms Application in Visual Studio, and include all necessary assemblies to the References list of your project.

Then, add the following code to the Form.Load event handler.

using System;
using System.Windows.Forms;
using DevExpress.XtraCharts;
// ...

private void Form1_Load(object sender, EventArgs e) {
    // Create an empty chart.
    ChartControl PieChart3D = new ChartControl();

    // Create a pie series.
    Series series1 = new Series("Pie Series 1", ViewType.Pie3D);

    // Populate the series with points.
    series1.Points.Add(new SeriesPoint("Russia", 17.0752));
    series1.Points.Add(new SeriesPoint("Canada", 9.98467));
    series1.Points.Add(new SeriesPoint("USA", 9.63142));
    series1.Points.Add(new SeriesPoint("China", 9.59696));
    series1.Points.Add(new SeriesPoint("Brazil", 8.511965));
    series1.Points.Add(new SeriesPoint("Australia", 7.68685));
    series1.Points.Add(new SeriesPoint("India", 3.28759));
    series1.Points.Add(new SeriesPoint("Others", 81.2));

    // Add the series to the chart.
    PieChart3D.Series.Add(series1);

    // Adjust the value numeric options of the series.
    series1.PointOptions.ValueNumericOptions.Format = NumericFormat.Percent;
    series1.PointOptions.ValueNumericOptions.Precision = 0;

    // Adjust the view-type-specific options of the series.
    ((Pie3DSeriesView)series1.View).Depth = 30;
    ((Pie3DSeriesView)series1.View).ExplodedPoints.Add(series1.Points[0]);
    ((Pie3DSeriesView)series1.View).ExplodedDistancePercentage = 30;

    // Access the diagram's options.
    ((SimpleDiagram3D)PieChart3D.Diagram).RotationType = RotationType.UseAngles;
    ((SimpleDiagram3D)PieChart3D.Diagram).RotationAngleX = -35;

    // Add a title to the chart and hide the legend.
    ChartTitle chartTitle1 = new ChartTitle();
    chartTitle1.Text = "3D Pie Chart";
    PieChart3D.Titles.Add(chartTitle1);
    PieChart3D.Legend.Visible = false;

    // Add the chart to the form.
    PieChart3D.Dock = DockStyle.Fill;
    this.Controls.Add(PieChart3D);
}
TIP

A complete sample project is available in the DevExpress Code Examples database at http://www.devexpress.com/example=E1028.

See Also