添加项目文件。

Live-Charts-master/Examples/Wpf/CartesianChart/PointState/PointStateExample.xaml.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+using LiveCharts;
+using LiveCharts.Configurations;
+using LiveCharts.Defaults;
+
+namespace Wpf.CartesianChart.PointState
+{
+    /// <summary>
+    /// Interaction logic for PointStateExample.xaml
+    /// </summary>
+    public partial class PointStateExample : UserControl
+    {
+        public PointStateExample()
+        {
+            InitializeComponent();
+            
+            var r = new Random();
+            Values = new ChartValues<ObservableValue>
+            {
+                new ObservableValue(r.Next(10, 400)),
+                new ObservableValue(r.Next(10, 400)),
+                new ObservableValue(r.Next(10, 400)),
+                new ObservableValue(r.Next(10, 400)),
+                new ObservableValue(r.Next(10, 400)),
+                new ObservableValue(r.Next(10, 400))
+            };
+
+            //Lets define a custom mapper, to set fill and stroke
+            //according to chart values...
+            Mapper = Mappers.Xy<ObservableValue>()
+                .X((item, index) => index)
+                .Y(item => item.Value)
+                .Fill(item => item.Value > 200 ? DangerBrush : null)
+                .Stroke(item => item.Value > 200 ? DangerBrush : null);
+
+            Formatter = x => x + " ms";
+
+            DangerBrush = new SolidColorBrush(Color.FromRgb(238,83,80));
+
+            DataContext = this;
+        }
+
+        public Func<double, string> Formatter { get; set; }
+        public ChartValues<ObservableValue> Values { get; set; }
+        public Brush DangerBrush { get; set; }
+        public CartesianMapper<ObservableValue> Mapper { get; set; } 
+
+        private void UpdateDataOnClick(object sender, RoutedEventArgs e)
+        {
+            var r = new Random();
+            foreach (var observable in Values)
+            {
+                observable.Value = r.Next(10, 400);
+            }
+        }
+    }
+}