Point Chart
- 3 minutes to read
Short Description
The Point Chart is represented by the PointSeriesView object, which belongs to Point and Line Series Views. This view is useful when it’s necessary to show points from two or more different series on the same chart plot.
A Point chart is shown in the image below. Note that this chart type is based upon the XYDiagram, so it can be rotated to show points either vertically or horizontally.
Chart Type Characteristics
The table below lists the main characteristics of this chart type.
| Feature | Value |
|---|---|
| Series View type | PointSeriesView |
| Diagram type | 2D-XYDiagram |
| 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 Point Chart, refer to the Series Views Compatibility document.
Example
The following example demonstrates how to create a ChartControl with a series of the PointSeriesView type, 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 a new chart.
ChartControl pointChart = new ChartControl();
// Create a point series.
Series series1 = new Series("Series 1", ViewType.Point);
// Set the numerical argument scale type for the series,
// as it is qualitative, by default.
series1.ArgumentScaleType = ScaleType.Numerical;
// Add points to it.
series1.Points.Add(new SeriesPoint(1, 10));
series1.Points.Add(new SeriesPoint(2, 22));
series1.Points.Add(new SeriesPoint(3, 14));
series1.Points.Add(new SeriesPoint(4, 27));
series1.Points.Add(new SeriesPoint(5, 15));
series1.Points.Add(new SeriesPoint(6, 28));
series1.Points.Add(new SeriesPoint(7, 15));
series1.Points.Add(new SeriesPoint(8, 33));
// Add the series to the chart.
pointChart.Series.Add(series1);
// Access the view-type-specific options of the series.
PointSeriesView myView1 = (PointSeriesView)series1.View;
myView1.PointMarkerOptions.Kind = MarkerKind.Star;
myView1.PointMarkerOptions.StarPointCount = 5;
myView1.PointMarkerOptions.Size = 20;
// Access the type-specific options of the diagram.
((XYDiagram)pointChart.Diagram).EnableAxisXZooming = true;
// Hide the legend (if necessary).
pointChart.Legend.Visible = false;
// Add a title to the chart (if necessary).
pointChart.Titles.Add(new ChartTitle());
pointChart.Titles[0].Text = "A Point Chart";
// Add the chart to the form.
pointChart.Dock = DockStyle.Fill;
this.Controls.Add(pointChart);
}