ConstantLine.ShowBehind Property

Gets or sets a value that specifies whether the constant line is displayed behind the other chart elements on the diagram.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v21.2.dll


public bool ShowBehind { get; set; }

Property Value

Type Description

true if the constant line is displayed behind the other chart elements; false if the constant line is displayed in front of the other chart elements.


Use the ShowBehind property to specify how the current constant line is displayed within the chart control’s diagram.

Set the ShowBehind property to true if you need to position a constant line behind the other chart elements (such as bars, point markers or lines that connect point markers, for instance) so that these elements overlap the line (including the line’s title) in their intersections.

By default, this property is set to true and a constant line is displayed in front of most chart elements (with the only exception being the filled series labels - those whose FillStyle2D.FillMode property is not set to FillMode.Empty) so that the whole line is visible.

ShowBehind = False ShowBehind = True
ShowBehind_false.png ShowBehind_true.png

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");

// 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;
See Also