What am I doing wrong; Legend will not display.

[kevin]

I need to generate graphs on the fly and only when I receive the response will I know what type of graph to generate.

I have been trying for about a hour and cannot figure it out.  What am I doing wrong?  The legend shows the title, but it does not show the legend label that has been associated with each datapoint.  Why?

What am I missing?
           

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";

            

[Giuseppe]

Hi kevin,

Generally it is not necessary to recreate the default ChartArea instance (RadChart.DefaultView.ChartArea) but if you would like to stick to that approach, you will need to properly associate your ChartArea with the respective ChartLegend (note that ChartArea.LegendName is primarily useful in XAML scenarios and it assumes the ChartLegend.Name property is set to the same value). In your scenario it is better to associate the ChartArea and the ChartLegend like this:

chartArea.Legend = RadChart1.DefaultView.ChartLegend;

Hope this helps.


All the best,
Giuseppe
the Telerik team