LineSeriesView.MarkerVisibility Property

Specifies whether the series point markers are visible.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v19.2.dll

Declaration

[XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)]
public DefaultBoolean MarkerVisibility { get; set; }
<XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)>
Public Property MarkerVisibility As DefaultBoolean

Property Value

Type Description
DefaultBoolean

Default - marker visibility (visible/invisible) is automatically determined according to the type of a diagram currently displayed on a chart; True - the markers are visible; False - markers are hidden. The default is DefaultBoolean.Default.

Remarks

Use the MarkerVisibility property to show or hide the point markers of series points on a diagram and in the legend.

NOTE

When the ChartControl.RuntimeHitTesting property is enabled, the SeriesPoint object can be inaccessible when hovering over the LineSeriesView at runtime. To resolve this issue, make sure the line point markers are visible (set the MarkerVisibility property to true).

Examples

The following example demonstrates how to create a ChartControl with a series of the LineSeriesView 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 lineChart = new ChartControl();

    // Create a line series.
    Series series1 = new Series("Series 1", ViewType.Line);

    // Add points to it.
    series1.Points.Add(new SeriesPoint(1, 2));
    series1.Points.Add(new SeriesPoint(2, 12));
    series1.Points.Add(new SeriesPoint(3, 14));
    series1.Points.Add(new SeriesPoint(4, 17));

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

    // Set the numerical argument scale types for the series,
    // as it is qualitative, by default.
    series1.ArgumentScaleType = ScaleType.Numerical;

    // Access the view-type-specific options of the series.
    ((LineSeriesView)series1.View).MarkerVisibility = DevExpress.Utils.DefaultBoolean.True;
    ((LineSeriesView)series1.View).LineMarkerOptions.Kind = MarkerKind.Triangle;
    ((LineSeriesView)series1.View).LineStyle.DashStyle = DashStyle.Dash;

    // Access the type-specific options of the diagram.
    ((XYDiagram)lineChart.Diagram).EnableAxisXZooming = true;

    // Hide the legend (if necessary).
    lineChart.Legend.Visibility = DevExpress.Utils.DefaultBoolean.False;

    // Add a title to the chart (if necessary).
    lineChart.Titles.Add(new ChartTitle());
    lineChart.Titles[0].Text = "A Line Chart";

    // Add the chart to the form.
    lineChart.Dock = DockStyle.Fill;
    this.Controls.Add(lineChart);
}
See Also