corelibraries-devexpress-dot-xtracharts-aa8a966b.md
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.v25.2.dll
NuGet Package : DevExpress.Charts
public class Marker :
SimpleMarker
Public Class Marker
Inherits SimpleMarker
The following members return Marker objects:
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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.
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);
}
Imports System
Imports System.Windows.Forms
Imports DevExpress.XtraCharts
' ...
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) _
Handles MyBase.Load
' Create a new chart.
Dim pointChart As New ChartControl()
' Create a point series.
Dim series1 As 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.
Dim myView1 As PointSeriesView = CType(series1.View, PointSeriesView)
myView1.PointMarkerOptions.Kind = MarkerKind.Star
myView1.PointMarkerOptions.StarPointCount = 5
myView1.PointMarkerOptions.Size = 20
' Access the type-specific options of the diagram.
CType(pointChart.Diagram, XYDiagram).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
Me.Controls.Add(pointChart)
End Sub
Object ChartElement MarkerBase SimpleMarker Marker
See Also