Telerik WPF传奇问题被难倒

我需要动态生成图形，只有当我收到响应时，我才知道要生成什么类型的图形

我已经试了大约一个小时了，想不出来。我做错了什么？图例显示标题，但不显示与每个数据点关联的图例标签。为什么?

我已经搜索了几个小时，并逐字记录了样本，但图例仍然不会显示LegendLabel。我从馅饼开始，因为我认为这是最简单的

我错过了什么

var chartArea = new ChartArea();
 chartArea.LegendName = "test";

 var pieSeries = new DataSeries
 {
     Definition = new PieSeriesDefinition
     {
         InteractivitySettings =
             {HoverScope = InteractivityScope.None,
              SelectionScope = InteractivityScope.Item,
               SelectionMode = ChartSelectionMode.Single
              }
     }
 };


pieSeries.Definition.ItemLabelFormat = "p";
pieSeries.Add( new DataPoint() { YValue = 0.215208267, LegendLabel = "Toyota" } );
pieSeries.Add( new DataPoint() { YValue = 0.192960612, LegendLabel = "General Motors"     } );
pieSeries.Add( new DataPoint() { YValue = 0.151830229, LegendLabel = "Volkswagen" } );
pieSeries.Add( new DataPoint() { YValue = 0.125964366, LegendLabel = "Ford" } );
pieSeries.Add( new DataPoint() { YValue = 0.091152353, LegendLabel = "Honda" } );
pieSeries.Add( new DataPoint() { YValue = 0.079093251, LegendLabel = "Nissan" } );
pieSeries.Add( new DataPoint() { YValue = 0.079093251, LegendLabel = "PSA" } );
pieSeries.Add( new DataPoint() { YValue = 0.064697675, LegendLabel = "Hyundai" } );

chartArea.DataSeries.Add(pieSeries);
RadChart1.DefaultView.ChartLegend.UseAutoGeneratedItems = true;
RadChart1.DefaultView.ChartArea = chartArea;
RadChart1.DefaultView.ChartLegend.Header = "Legend test";

---

我以前没有单独创建数据点。但是，下面是我用来将数据视图中的信息分配给饼图的代码。这对我来说很好：

//Assigns the DataView to the grid
SeriesMapping mySeries = new SeriesMapping();
mySeries.SeriesDefinition = new PieSeriesDefinition();
mySeries.SeriesDefinition.Appearance.StrokeThickness = 2;
mySeries.ItemMappings.Add(new ItemMapping("Value", DataPointMember.YValue));
mySeries.ItemMappings.Add(new ItemMapping("Manufacturer", DataPointMember.LegendLabel));
pieChart.SeriesMappings.Add(mySeries);

pieChart.ItemsSource = myPieChartView;

我在这里看到的区别是，您将信息分配给DataSeries，而不是SeriesMappings。也许这会引起一个问题