项目结构调整

Others/Live-Charts-master/Examples/Wpf/PieChart/DropDowns/PiePoint.cs

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+using System.Linq;
+using LiveCharts;
+using LiveCharts.Configurations;
+
+namespace Wpf.PieChart.DropDowns
+{
+    public class DropDownPoint
+    {
+        static DropDownPoint()
+        {
+            //In this case we are plotting our own point to have 
+            //more control over the current plot
+            //configuring a custom type is quite simple
+
+            //first we define a mapper
+            var mapper = Mappers.Pie<DropDownPoint>()
+                .Value(x => x.Value);//use the value property in the plot
+
+            //then we save the mapper globally, there are many ways
+            //so configure a series, for more info see:
+            //https://lvcharts.net/App/examples/v1/wpf/Types%20and%20Configuration
+            Charting.For<DropDownPoint>(mapper);
+        }
+
+        /// <summary>
+        /// Gets or sets the value to plot
+        /// </summary>
+        /// <value>
+        /// The value.
+        /// </value>
+        public double Value
+        {
+            get { return Content.Sum(); }
+        }
+
+        /// <summary>
+        /// Gets or sets the content, all the values that represent this point
+        /// </summary>
+        /// <value>
+        /// The content.
+        /// </value>
+        public double[] Content { get; set; }
+
+        /// <summary>
+        /// Gets or sets the title.
+        /// </summary>
+        /// <value>
+        /// The title.
+        /// </value>
+        public double Title { get; set; }
+    }
+}