aspnet-15824-components-chart-control-visual-elements-constant-line.md
A Constant Line is used to indicate the value on the diagram’s corresponding axis. Each axis can contain any number of constant lines within its Axis2D.ConstantLines collection. A constant line can be identified by its title. Refer to the following help topic for details: Constant Lines.
The table below lists the main properties that affect the element’s appearance and functionality:
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Availability
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The Axis2D.ConstantLines property of an axis, the ConstantLineCollection.Item property of the axis’s constant line collection.
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Appearance
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ConstantLine.Color, ConstantLine.LineStyle
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Identification
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ChartElementNamed.Name, ConstantLine.LegendText, ConstantLine.ShowInLegend, ConstantLine.Title
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Position
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ConstantLine.AxisValue, ConstantLine.ShowBehind
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Visibility
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ConstantLine.Visible, ConstantLine.CheckedInLegend
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Custom Draw Event
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WebChartControl.CustomDrawSeries
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See Also