Possible bug when displaying labels in lineseries

Hello,

I have recently upgraded to a slightly newer version of the WPFElements library. One of our plots suddenly doesn't work anymore (it throw an exception). I have found the problem to be that this plot displays a label alongside a LineSeries serie.

This problem did not occur in version 6.0.2165.22593 of the library, but it does occur in version 6.0.2344.22805.

I have written a little test program to reproduce this issue:

  public MainWindow()
  {
     InitializeComponent();

     var chart = new Chart();

     var serie2 = new PlotSerie();
     serie2.Points.Add(new DataPoint { XValue = 0, YValue = 0 });
     serie2.Points.Add(new DataPoint { XValue = 100, YValue = 100, Label = "100%" });
     var dserie2 = new LineSeries { ItemsSource = serie2.Points, XBinding = new Binding("XValue"), YBinding = new Binding("YValue") };

     const string template =
        "<ControlTemplate " +
           "xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" " +
           "xmlns:ms=\"http://namespaces.mindscape.co.nz/wpf\" " +
           "TargetType=\"ms:DataLabel\">" +
           "<Grid>" +
              "<TextBlock " +
                 "Text=\"{Binding DataPoint.DataContext.Label, RelativeSource={RelativeSource TemplatedParent}}\" " +
                 "Foreground=\"Black\" />" +
           "</Grid>" +
        "</ControlTemplate>";
     var style = new Style(typeof(DataLabel));

     dserie2.ShowDataLabels = true;
     style.Setters.Add(new Setter(TemplateProperty, XamlReader.Parse(template)));
     dserie2.DataLabelStyle = style;

     chart.Series.Add(dserie2);

     grid.Children.Add(chart);
  }

In case your wondering, our application is set up in such a way that plots are created entirely in c# code.

greetings, Thomas

Hello Thomas

Thanks for bringing this to our attention and apologies for this bug occurring. This will be resolved in the next nightly build.

Jason Fauchelle