How to redraw WPF Chart (SfChart) while dragging the series out of the range?

This document demonstrates how to redraw in a predefined range for the WPF Chart (SfChart) using the DragEnd event. This event allows you to implement functions after dragging a segment in the chart. By utilizing this event, you can obtain the new position and axis value where the segment is dragged and subsequently adjust the secondary axis values of the Minimum and Maximum properties based on the new value. 

XAML

<chart:SfChart>
    <chart:SfChart.PrimaryAxis>
         <chart:CategoryAxis x:Name="axis1"/>
    </chart:SfChart.PrimaryAxis>
    <chart:SfChart.SecondaryAxis>
         <chart:NumericalAxis x:Name="sec_axis" 
                              Minimum="10" Maximum="350" 
                              RangePadding="Round" 
                              Interval="50"/>
    </chart:SfChart.SecondaryAxis>
    <chart:LineSeries XBindingPath="Product" 
                      YBindingPath="Price" 
                      DragEnd="LineSeries_DragEnd" 
                      ItemsSource="{Binding Products}" 
                      EnableDragTooltip="True" 
                      EnableSegmentDragging="True">
    </chart:LineSeries>
</chart:SfChart>

C#

private void LineSeries_DragEnd(object sender, Syncfusion.UI.Xaml.Charts.ChartDragEndEventArgs e)
{
   if(e.NewYValue<sec_axis.Minimum)
   {
     sec_axis.Minimum = e.NewYValue;
   }
   else if(e.NewYValue>sec_axis.Maximum)
   {
     sec_axis.Maximum = e.NewYValue;
   }
}

Output:

The initial segment position and its position while being dragged are displayed in the first image.

The second image shows the segment redrawn after dragging.

Conclusion

I hope you enjoyed learning how to redraw WPF Chart while dragging the series out of the range.

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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