corelibraries-devexpress-dot-xtracharts-dot-constantline-28ee3dc1.md
Specifies whether the constant line is visible.
Namespace : DevExpress.XtraCharts
Assembly : DevExpress.XtraCharts.v25.2.dll
NuGet Package : DevExpress.Charts
[XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)]
public bool Visible { get; set; }
<XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)>
Public Property Visible As Boolean
| Type | Description |
|---|---|
| Boolean |
true if the constant line is visible; otherwise, false.
|
Use the Visible property to show or hide the constant line within a chart’s diagram.
For more information, refer to Constant Lines.
This example demonstrates how a constant line can be created and customized at runtime.
Since constant lines belong to a diagram’s axis, it’s first required to cast your diagram object to the appropriate diagram’s type. After that, it’s possible to access axes and manage their constant lines collection.
// Cast the chart's diagram to the XYDiagram type, to access its axes.
XYDiagram diagram = (XYDiagram)chartControl1.Diagram;
// Create a constant line.
ConstantLine constantLine1 = new ConstantLine("Constant Line 1");
diagram.AxisY.ConstantLines.Add(constantLine1);
// Define its axis value.
constantLine1.AxisValue = 7;
// Customize the behavior of the constant line.
constantLine1.Visible = true;
constantLine1.ShowInLegend = true;
constantLine1.LegendText = "Some Threshold";
constantLine1.ShowBehind = false;
// Customize the constant line's title.
constantLine1.Title.Visible = true;
constantLine1.Title.Text = "Constant Line Title";
constantLine1.Title.TextColor = Color.Red;
constantLine1.Title.Antialiasing = false;
constantLine1.Title.Font = new Font("Tahoma", 14, FontStyle.Bold);
constantLine1.Title.ShowBelowLine = true;
constantLine1.Title.Alignment = ConstantLineTitleAlignment.Far;
// Customize the appearance of the constant line.
constantLine1.Color = Color.Red;
constantLine1.LineStyle.DashStyle = DashStyle.Dash;
constantLine1.LineStyle.Thickness = 2;
' Cast the chart's diagram to the XYDiagram type, to access its axes.
Dim diagram As XYDiagram = CType(chartControl1.Diagram, XYDiagram)
' Create a constant line.
Dim constantLine1 As New ConstantLine("Constant Line 1")
diagram.AxisY.ConstantLines.Add(constantLine1)
' Define its axis value.
constantLine1.AxisValue = 7
' Customize the behavior of the constant line.
constantLine1.Visible = True
constantLine1.ShowInLegend = True
constantLine1.LegendText = "Some Threshold"
constantLine1.ShowBehind = False
' Customize the constant line's title.
constantLine1.Title.Visible = True
constantLine1.Title.Text = "Constant Line Title"
constantLine1.Title.TextColor = Color.Red
constantLine1.Title.Antialiasing = False
constantLine1.Title.Font = New Font("Tahoma", 14, FontStyle.Bold)
constantLine1.Title.ShowBelowLine = True
constantLine1.Title.Alignment = ConstantLineTitleAlignment.Far
' Customize the appearance of the constant line.
constantLine1.Color = Color.Red
constantLine1.LineStyle.DashStyle = DashStyle.Dash
constantLine1.LineStyle.Thickness = 2
The following code snippets (auto-collected from DevExpress Examples) contain references to the Visible 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.
dashboard-constant-lines/CS/ConstantLineExtension.Win/ConstantLineModule.cs#L75
ConstantLine line = new ConstantLine();
line.Visible = true;
line.ShowInLegend = false;
ConstantLine line = new ConstantLine();
line.Visible = true;
line.ShowInLegend = false;
ConstantLine line = new ConstantLine();
line.Visible = true;
line.ShowInLegend = false;
ConstantLine line = new ConstantLine();
line.Visible = true;
line.ShowInLegend = false;
Dim line As New ConstantLine()
line.Visible = True
line.ShowInLegend = False
winforms-chart-create-and-customize-a-constant-line/VB/ConstLines/Form1.vb#L38
' Customize the behavior of the constant line.
constantLine1.Visible = True
constantLine1.ShowInLegend = True
See Also