Custom
This sample uses C# 13 preview features such as partial properties, it also uses features from the CommunityToolkit.Mvvm package, you can learn more about it here.
This web site wraps every sample using a UserControl instance, but LiveCharts controls can be used inside any container.
View model
using System;
using LiveChartsCore.Kernel;
namespace ViewModelsSamples.Pies.Custom;
public class PieData(string name, double value, double offset)
{
public string Name { get; set; } = name;
public double[] Values { get; set; } = [value];
public double Offset { get; set; } = offset;
public Func<ChartPoint, string> Formatter { get; set; } =
point =>
{
var pv = point.Coordinate.PrimaryValue;
var sv = point.StackedValue!;
return $"{pv}/{sv.Total}{Environment.NewLine}{sv.Share:P2}";
};
}
public class ViewModel
{
public PieData[] Data { get; set; } = [
new("Mary", 10, 0),
new("John", 20, 50),
new("Alice", 30, 100),
new("Bob", 40, 150)
];
}
XAML
<UserControl
x:Class="WinUISample.Pies.Custom.View"
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:lvc="using:LiveChartsCore.SkiaSharpView.WinUI"
xmlns:vms="using:ViewModelsSamples.Pies.Custom"
mc:Ignorable="d">
<UserControl.DataContext>
<vms:ViewModel/>
</UserControl.DataContext>
<lvc:PieChart
InitialRotation="-90"
SeriesSource="{Binding Data}">
<lvc:PieChart.SeriesTemplate>
<DataTemplate>
<lvc:XamlPieSeries
SeriesName="{Binding Name}"
Values="{Binding Values}"
OuterRadiusOffset="{Binding Offset}"
ShowDataLabels="True"
ToolTipLabelFormatter="{Binding Formatter}"
DataLabelsFormatter="{Binding Formatter}"/>
</DataTemplate>
</lvc:PieChart.SeriesTemplate>
</lvc:PieChart>
</UserControl>
