Overview

The .NET MAUI spline chart resembles a line chart, with the difference being that instead of connecting the data points with straight lines, the data points are connected by smooth Bezier curves.

.NET MAUI Spline Chart documentation

.NET MAUI spline chart.

Key features

Different .NET MAUI spline chart types.

Spline types

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

.NET MAUI vertical spline chart.

Vertical spline chart

Rotate the spline chart to plot data vertically and view data from a different perspective.

.NET MAUI spline chart with multiple axes.

Multiple axes

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

Code example

xaml
c#
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui" 
        xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
        x:Class="ChartExample.MainPage"
        xmlns:local="using:ChartExample"
        xmlns:chart="clr-namespace:Syncfusion.Maui.Charts;assembly=Syncfusion.Maui.Charts">
    
    <Grid>
        <chart:SfCartesianChart HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
            <!--Setting BindingContext-->
            <chart:SfCartesianChart.BindingContext>
                <local:ViewModel/>
            </chart:SfCartesianChart.BindingContext>

            <!--Initialize the horizontal axis for the .NET MAUI Cartesian Chart.-->
            <chart:SfCartesianChart.XAxes>
                <chart:CategoryAxis/>
            </chart:SfCartesianChart.XAxes>

            <!--Initialize the vertical axis for the .NET MAUI Cartesian Chart.-->
            <chart:SfCartesianChart.YAxes>
                <chart:NumericalAxis/>
            </chart:SfCartesianChart.YAxes>
           
            <!--Adding Spline Series to the .NET MAUI Cartesian Chart.-->
            <chart:SplineSeries 
                        ItemsSource="{Binding Data}" 
                        XBindingPath="Month"
                        YBindingPath="Target">
            </chart:SplineSeries> 
        </chart:SfCartesianChart>
    </Grid>
</ContentPage>
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), 
        };
    }
}