WPF Charts Spline Chart

Overview

The WPF spline chart resembles a line chart, but instead of connecting the data points with straight lines, the data points are connected by smooth Bezier curves.

WPF Spline Chart documentation

WPF Spline Chart

Key features

Different WPF Spline Chart

Spline type

Use Four types of rendering: natural, monotonic, cardinal, and clamped.

WPF Vertical Spline Chart

Vertical spline chart

Rotate the spline chart to plot data in a vertical direction and view it from a different perspective.

WPF Spline Chart showing Empty Point aka Null Point

Empty and null points

Empty or null data points are elegantly handled in spline charts.

WPF Spline Chart with Multiple Axes

Multiple axes

Use multiple axes to plot different data sets that widely vary from one another.

WPF Spline Chart with Data Markers

Display markers

Data points are visualized as marks with built-in symbols: crosses, squares, pluses, inverted triangles, hexagons, ellipses, vertical lines, horizontal lines, diamonds, triangles, and pentagons.

Code example

Easily get started with the WPF Spline Chart using a few simple lines of C# code example as demonstrated below,

xaml
c#
<Window x:Class="ChartExample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:ChartExample"
        xmlns:chart="clr-namespace:Syncfusion.UI.Xaml.Charts;assembly=Syncfusion.SfChart.WPF"
        mc:Ignorable="d"
        Title="WPF Spline Chart" Height="450" Width="700">
    
    <!--Setting DataContext-->
    <Window.DataContext>
        <local:ViewModel/>
    </Window.DataContext>
    
    <StackPanel>
        <chart:SfChart Height="300" Width="500">
            <!--Initialize the horizontal axis for the WPF Chart-->
            <chart:SfChart.PrimaryAxis>
                <chart:CategoryAxis />
            </chart:SfChart.PrimaryAxis>

            <!--Initialize the vertical axis for the WPF Chart-->
            <chart:SfChart.SecondaryAxis>
                <chart:NumericalAxis />
            </chart:SfChart.SecondaryAxis>
           
            <!--Adding Spline Series to the WPF Chart-->
            <chart:SplineSeries 
                    ItemsSource="{Binding Data}" 
                    XBindingPath="Month"
                    YBindingPath="Target">
            </chart:SplineSeries>
        </chart:SfChart>
    </StackPanel>
</Window>
public class Model
{
    public string Month { get; set; }

    public double Target { get; set; }

    public Model(string xValue, double yValue)
    {
        Month = xValue;
        Target = yValue;
    }
}

public class ViewModel
{
    public ObservableCollection<Model> Data { get; set; }

    public ViewModel()
    {
        Data = new ObservableCollection<Model>()
        {
            new Model("Jan", 50),
            new Model("Feb", 70),
            new Model("Mar", 65),
            new Model("Apr", 57),
            new Model("May", 48), 
        };
    }
}