How to: Create a 2D Spline Chart

• Apr 15, 2018

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>