corelibraries-devexpress-dot-xtracharts-dot-lineseriesview.md
Specifies whether the series point markers are visible.
Namespace : DevExpress.XtraCharts
Assembly : DevExpress.XtraCharts.v25.2.dll
NuGet Package : DevExpress.Charts
[XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)]
public DefaultBoolean MarkerVisibility { get; set; }
<XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)>
Public Property MarkerVisibility As DefaultBoolean
| 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.
|
Available values:
| Name | Description | Return Value |
|---|---|---|
| True |
The value is true.
|
0
| | False |
The value is false.
|
1
| | Default |
The value is specified by a global option or a higher-level object.
|
2
|
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 ).
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;
using System.Drawing;
// ...
namespace Series_LineChart {
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
}
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.Size = 20;
((LineSeriesView)series1.View).LineMarkerOptions.Kind = MarkerKind.Triangle;
((LineSeriesView)series1.View).LineStyle.DashStyle = DashStyle.Dash;
// Access the view-type-specific options of the series.
((XYDiagram)lineChart.Diagram).AxisY.Interlaced = true;
((XYDiagram)lineChart.Diagram).AxisY.InterlacedColor = Color.FromArgb(20, 60, 60, 60);
((XYDiagram)lineChart.Diagram).AxisX.NumericScaleOptions.AutoGrid = false;
((XYDiagram)lineChart.Diagram).AxisX.NumericScaleOptions.GridSpacing = 1;
// 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 = "Line Chart";
// Add the chart to the form.
lineChart.Dock = DockStyle.Fill;
this.Controls.Add(lineChart);
}
}
}
Imports System
Imports System.Windows.Forms
Imports DevExpress.XtraCharts
Imports System.Drawing
' ...
Namespace Series_LineChart
Public Partial Class Form1
Inherits Form
Public Sub New()
InitializeComponent()
End Sub
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
' Create a new chart.
Dim lineChart As ChartControl = New ChartControl()
' Create a line series.
Dim series1 As Series = 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.
CType(series1.View, LineSeriesView).MarkerVisibility = DevExpress.Utils.DefaultBoolean.True
CType(series1.View, LineSeriesView).LineMarkerOptions.Size = 20
CType(series1.View, LineSeriesView).LineMarkerOptions.Kind = MarkerKind.Triangle
CType(series1.View, LineSeriesView).LineStyle.DashStyle = DashStyle.Dash
' Access the view-type-specific options of the series.
CType(lineChart.Diagram, XYDiagram).AxisY.Interlaced = True
CType(lineChart.Diagram, XYDiagram).AxisY.InterlacedColor = Color.FromArgb(20, 60, 60, 60)
CType(lineChart.Diagram, XYDiagram).AxisX.NumericScaleOptions.AutoGrid = False
CType(lineChart.Diagram, XYDiagram).AxisX.NumericScaleOptions.GridSpacing = 1
' 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 = "Line Chart"
' Add the chart to the form.
lineChart.Dock = DockStyle.Fill
Me.Controls.Add(lineChart)
End Sub
End Class
End Namespace
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the MarkerVisibility property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
winforms-charts-create-line-chart/CS/Series_LineChart/Form1.cs#L34
// Access the view-type-specific options of the series.
((LineSeriesView)series1.View).MarkerVisibility = DevExpress.Utils.DefaultBoolean.True;
((LineSeriesView)series1.View).LineMarkerOptions.Size = 20;
winforms-charts-create-line-chart/VB/Series_LineChart/Form1.vb#L32
' Access the view-type-specific options of the series.
CType(series1.View, LineSeriesView).MarkerVisibility = DevExpress.Utils.DefaultBoolean.True
CType(series1.View, LineSeriesView).LineMarkerOptions.Size = 20
See Also