Relative Value at the Bars (percentage )

[Karim]

Hello,

I am using the telerik winform components specially the bar char view. I created a bar series where we set the combine mode to bar100 so that we can see the percentage values at the x-axes. My problem is that we want to display the percentage values directly at the bars instead at absolute values. 

Does anybody know how I can display the relative value at the bars?

Karim

[Ivan Petrov]

Hello Karim,

Thank you for writing.

You can use RadChartView's LabelFormatting event to customize the text displayed in the labels. Here is a code snippet which demonstrates how to do it in your case:

private void radChartView1_LabelFormatting(object sender, ChartViewLabelFormattingEventArgs e)
{
  CategoricalDataPoint point = e.LabelElement.DataPoint as CategoricalDataPoint;

  double total = 0d;

  foreach (BarSeries series in this.radChartView1.Series)
  {
    foreach (CategoricalDataPoint dp in series.DataPoints)
    {
      if (dp.Category.Equals(point.Category) && dp.Value.HasValue)
      {
        total += dp.Value.Value;
      }
    }
  }

  e.LabelElement.Text = string.Format("{0:P2}", (point.Value / total));
}

I hope this will be useful. Should you have further questions, I would be glad to help.
 
Kind regards,
Ivan Petrov
the Telerik team