Marker Class
Contains settings of data point markers displayed by series of the point and line types, and also of the area type.
Namespace: DevExpress.XtraCharts
Assembly: DevExpress.XtraCharts.v20.1.dll
NuGet Packages: DevExpress.Charts, DevExpress.WindowsDesktop.Charts
Declaration
Related API Members
The following members return Marker objects:
Remarks
In addition to the settings inherited from the base SimpleMarker class, the Marker class exposes the properties that allow you to specify the color of markers (Marker.Color) and their visibility within a chart control (Marker.Visible).
An object of the Marker can be accessed via the LineSeriesView.LineMarkerOptions property of a line series object, and StackedAreaSeriesView.MarkerOptions property for a stacked area diagram.
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);
}