WPF Charts Spline Area Chart

Overview

The WPF spline area chart is designed for visualizing quantitative data. It is an area chart type that plots a fitted curve through each data point in a series. It is used to represent time-dependent data and show trends in data at equal intervals.

WPF Spline Area Chart documentation

WPF-Spline Area Chart

Key features

WPF Vertical Spline Area Chart

Vertical spline area chart

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

WPF Spline Area Chart showing Empty Point aka Null Point

Empty and null points

The spline area chart handles empty or null data points elegantly.

WPF Spline Area Chart with Customized Color and Thickness

UI styling

Customize the color and thickness of the spline area chart using the built-in APIs to make it visually unique.

WPF Spline Area Chart with Multiple Axes

Multiple axes

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

WPF Spline Area Chart with Data Markers

Display markers

The WPF spline area chart 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 Area 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 Area 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 Area Series to the WPF Chart-->
            <chart:SplineAreaSeries 
                    ItemsSource="{Binding Data}" 
                    XBindingPath="Month"
                    YBindingPath="Target">
            </chart:SplineAreaSeries>
        </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), 
        };
    }
}