RadPieChart Labels

[Andrew]

Is it possible to get a label to show up when your mouse moves over a pie slice? The label would contain info on the pie slice i.e. its value.

[Petar Kirov]

Hi Andrew,

I believe that the feature you are talking about is tooltips. You can enable them by adding ChartTooltipBehavior to the Behaviours collection of ChartView (including RadPieChart). You can also define your custom template for the tooltips in which you can choose the information you want to display (for example the percentage of the datapoint and some other property of the underlying dataitem).
Here is an example: 

<telerik:RadPieChart x:Name="pieChart">
    <telerik:RadPieChart.Behaviors>
        <telerik:ChartTooltipBehavior/>
    </telerik:RadPieChart.Behaviors>

    <telerik:RadPieChart.TooltipTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding Percent}"/>
                <TextBlock Text="{Binding DataItem.Name}"/>

Regards,
Petar Kirov
the Telerik team