SplineSeries2D.LineTension Property

Gets or sets the line tension to be used when drawing splines of the SplineSeries2D.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v18.2.dll

Declaration

C#

public double LineTension { get; set; }

VB.NET

Public Property LineTension As Double

Property Value

Type	Description
Double	A double value specifying the line tension.

Remarks

Use the LineTension property to specify the “smoothness” of a spline curve. Note that if the LineTension property is set to 0, the SplineSeries2D is drawn in the same way as the LineSeries2D.

Example

The following example demonstrates how to create a 2D Spline chart. To do this, it is necessary to assign the ChartControl.Diagram property to XYDiagram2D, and then add a SplineSeries2D object with points to the diagram’s Diagram.Series collection.

Also, this example shows how to specify SplineSeries2D.LineTension and LineSeries2D.MarkerSize properties and add a title to a chart.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-create-a-2d-spline-chart-t172158.

MainWindow.xaml

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
        x:Class="SplineChart.MainWindow"
        Title="Spline Chart" Height="350" Width="525">
    <Grid>
        <dxc:ChartControl>
            <dxc:ChartControl.Diagram>
                <dxc:XYDiagram2D>
                    <dxc:XYDiagram2D.Series>
                        <dxc:SplineSeries2D LineTension="0.8" MarkerSize="15"
                                            MarkerVisible="True">
                            <dxc:SplineSeries2D.Label>
                                <dxc:SeriesLabel ConnectorVisible="False"
                                                 ResolveOverlappingMode="Default"                                                   
                                                 Visible="True" />
                            </dxc:SplineSeries2D.Label>
                            <dxc:SplineSeries2D.Points>
                                <dxc:SeriesPoint Argument="1/1/2005" Value="138.7" />
                                <dxc:SeriesPoint Argument="2/1/2005" Value="141.4" />
                                <dxc:SeriesPoint Argument="3/1/2005" Value="159.5" />
                                <dxc:SeriesPoint Argument="4/1/2005" Value="160.7" />
                                <dxc:SeriesPoint Argument="5/1/2005" Value="148.8" />
                                <dxc:SeriesPoint Argument="6/1/2005" Value="166.6" />
                            </dxc:SplineSeries2D.Points>
                        </dxc:SplineSeries2D>
                    </dxc:XYDiagram2D.Series>
                    <dxc:XYDiagram2D.AxisX>
                        <dxc:AxisX2D GridLinesVisible="True"/>
                    </dxc:XYDiagram2D.AxisX>
                    <dxc:XYDiagram2D.AxisY>
                        <dxc:AxisY2D>
                            <dxc:AxisY2D.Title>
                                <dxc:AxisTitle Content="Cents per Gallon" />
                            </dxc:AxisY2D.Title>
                            <dxc:AxisY2D.WholeRange>
                                <dxc:Range dxc:AxisY2D.AlwaysShowZeroLevel="False" />
                            </dxc:AxisY2D.WholeRange>
                        </dxc:AxisY2D>
                    </dxc:XYDiagram2D.AxisY>
                </dxc:XYDiagram2D>
            </dxc:ChartControl.Diagram>
            <dxc:ChartControl.Titles>
                <dxc:Title Dock="Top" HorizontalAlignment="Center" Content="U.S. Fuel Oil Prices" />
            </dxc:ChartControl.Titles>
        </dxc:ChartControl>
    </Grid>
</Window>

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the LineTension 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.

C#

how-to-create-a-2d-spline-chart-t172158/VB/SplineChart/MainWindow.xaml#L17

ValueDataMember="Value"
LineTension="0.8"
MarkerSize="15"