How to display trackball label or tooltip over chart annotation?

Description

This article explains how to display the trackball label or tooltip over an annotation in a chart.

Solution

To display the trackball label or tooltip over an annotation, modify the rendering panel's order by accessing the chart template as shown in the code snippet below.

C#

public class SfChartExt : SfChart 
{ 
     public override void OnApplyTemplate() 
     { 
         base.OnApplyTemplate(); 
         Canvas.SetZIndex(GetTemplateChild("adorningCanvas") as Canvas, 1); 
     } 
} 
 

  XAML

<local:SfChartExt>
 
     <chart:SfChart.PrimaryAxis>
         <chart:NumericalAxis/>
     </chart:SfChart.PrimaryAxis>
 
     <chart:SfChart.SecondaryAxis>
         <chart:NumericalAxis/>
     </chart:SfChart.SecondaryAxis>
 
     ..
</local:SfChartExt>

Output

Conclusion

I hope you enjoyed learning how to display trackball label or tooltip over chart annotation.

You can refer to our WPF Chart feature tour page know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our WPF Chart Examples to understand how to create and manipulate data.

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