Hello Vincent,
Thank you for writing.
You can customize the chart labels by using the
LabelFormatting event. Thus, you can set the ChartViewLabelFormattingEventArgs.LabelElement.
BackColor property to Color.
Transparent. Additionally, you can customize the label's text as well.
public Form1()
{
InitializeComponent();
this.radChartView1.AreaType = ChartAreaType.Pie;
PieSeries series = new PieSeries();
series.DataPoints.Add(new PieDataPoint(50, "Germany"));
series.DataPoints.Add(new PieDataPoint(70, "United States"));
series.DataPoints.Add(new PieDataPoint(40, "France"));
series.DataPoints.Add(new PieDataPoint(25, "United Kingdom"));
series.ShowLabels = true;
this.radChartView1.Series.Add(series);
series.Children[0].BackColor = Color.Red;
this.radChartView1.LabelFormatting += radChartView1_LabelFormatting;
}
private void radChartView1_LabelFormatting(object sender, ChartViewLabelFormattingEventArgs e)
{
e.LabelElement.BackColor = Color.Transparent;
PiePointElement element = (PiePointElement)e.LabelElement.Parent;
PieDataPoint dataPoint = (PieDataPoint)element.DataPoint;
e.LabelElement.Text = string.Format("{0:P}, {1}", dataPoint.Label, dataPoint.LegendTitle);
}
I hope this information helps. Should you have further questions, I would be glad to help.
Regards,
Dess
Telerik
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