How to set the custom labels with auto range for axis in WPF Chart (SfChart)?

In Syncfusion WPF Chart (SfChart), you cannot set custom labels for an axis without explicitly specifying the range. However, this can be achieved by adding custom labels based on the position of visible labels in the ActualRangeChanged event.

XAML

 <!--Hooked ActualRangeChangedEvent-->
<chart:SfChart.SecondaryAxis>
      <chart:NumericalAxis ActualRangeChanged="NumericalAxis_ActualRangeChanged"/>
</chart:SfChart.SecondaryAxis>

C#

private void NumericalAxis_ActualRangeChanged(object sender, Syncfusion.UI.Xaml.Charts.ActualRangeChangedEventArgs e)
{
  var axis = sender as NumericalAxis;
  //Gets the collection of visible labels.
  var labels = axis.VisibleLabels;
  if (labels != null)
  {
    if (axis.CustomLabels.Count > 0)
      axis.CustomLabels.Clear();
 
    //Add custom labels based on the position of visible labels.
    for (int index = 0; index < labels.Count; index++)
    {
       var axisLabel = new ChartAxisLabel()
       {
           Position = labels[index].Position,//Set position where the custom label should be placed.
           LabelContent = "Item" + index //Set the content for the labels.
      };
      axis.CustomLabels.Add(axisLabel);
    }
  }
} 

Output:

The following screenshot illustrates the custom labels based on the range in y-axis.

Conclusion

I hope you enjoyed learning how to set the custom labels with auto range for axis in WPF Chart.

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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