Hello,

Thank you for posting to Infragistics Community!

Please, find attached below a sample app demonstrating how to display the item labels in the XamPieChart as percentage values.

The approach involves defining a LabelTemplate for the chart:

 <ig:XamPieChart Name="pieChart"
…
LabelTemplate="{StaticResource labelTemplate1}"/>

As you can see, the text is bound to a property of the Label DataContext named “PercentValue” and additionally, a custom converter is used to adjust the percent value:

<Grid.Resources>
     <local:ValueToPercentConverter x:Key="conv" />
     <DataTemplate x:Key="labelTemplate1">
         <StackPanel Orientation="Vertical">
             <TextBlock Text="{Binding PercentValue, StringFormat=P, Converter={StaticResource conv}}" />
         </StackPanel>
     </DataTemplate>
 </Grid.Resources>

   public class ValueToPercentConverter : IValueConverter
  {
      public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
      {
          double dv = (double)value;
          if (dv > 0)
              return dv / 100;
 
          return value;
      }
 
      public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
      {
          throw new NotImplementedException();
      }
}

In conclusion, please, check out the sample and let me know if it helps.

Best regards,
Bozhidara Pachilova
Software Developer

XamPieChartPercentages.zip