添加项目文件。

Live-Charts-master/Examples/UWP/PieChart/PieChartExample.xaml.cs

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+using LiveCharts;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
+
+namespace UWP.PieChart
+{
+    /// <summary>
+    /// An empty page that can be used on its own or navigated to within a Frame.
+    /// </summary>
+    public sealed partial class PieChartExample : Page
+    {
+        public PieChartExample()
+        {
+            InitializeComponent();
+
+            PointLabel = chartPoint =>
+                string.Format("{0} ({1:P})", chartPoint.Y, chartPoint.Participation);
+
+            DataContext = this;
+        }
+
+        public Func<ChartPoint, string> PointLabel { get; set; }
+
+        public IChartValues Values1 { get; set; } = new ChartValues<int>(new int[] { 3 });
+        public IChartValues Values2 { get; set; } = new ChartValues<int>(new int[] { 3 });
+        public IChartValues Values3 { get; set; } = new ChartValues<int>(new int[] { 3 });
+        public IChartValues Values4 { get; set; } = new ChartValues<int>(new int[] { 3 });
+    }
+}