Implement a Legend Control for a PieSeries

The RadLegendControl could be bound to the items of a single chart series. Here in an example of how to implement a RadLegendControl for a PieChart with PieSeries:

Example

Pie Chart Legend Control 2

  1. First, create a class for sample data.

    public class Data
    {
        public int Amount { get; set; }
    
        public string Category { get; set; }
    }
    
  2. Then, create a sample data.

    string[] category = new string[5] { "Paper", "Wood", "Cloth", "Glass", "Metal" };
    this.chart.DataContext = Enumerable.Range(1, 5).Select(x => new Data { Amount = 10 * x, Category = category[x - 1] }).ToList();
    
  3. Create the PieChart in XAML.

    <telerikChart:RadPieChart x:Name="chart" PaletteName="DefaultDark" Width="250" Height="250">
        <telerikChart:PieSeries ItemsSource="{Binding}" RadiusFactor="0.8">
            <telerikChart:PieSeries.ValueBinding>
                <telerikChart:PropertyNameDataPointBinding PropertyName="Amount"/>
            </telerikChart:PieSeries.ValueBinding>
            <telerikChart:PieSeries.LegendTitleBinding >
                <telerikChart:PropertyNameDataPointBinding PropertyName="Category"/>
            </telerikChart:PieSeries.LegendTitleBinding>
        </telerikChart:PieSeries>
    </telerikChart:RadPieChart>
    
  4. Finally, create the RadLegendControl and bind its LegendProvider property to the chart.

    <telerikPrimitives:RadLegendControl LegendProvider="{Binding ElementName=chart}">
        <telerikPrimitives:RadLegendControl.ItemsPanel>
            <ItemsPanelTemplate>
                <StackPanel Orientation="Vertical"/>
            </ItemsPanelTemplate>
        </telerikPrimitives:RadLegendControl.ItemsPanel>
        <telerikPrimitives:RadLegendControl.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <Ellipse Fill="{Binding Fill}" Stroke="{Binding Stroke}"
                             StrokeThickness="1" Width="10" Height="10"/>
                    <TextBlock Text="{Binding Title}" Foreground="{Binding Fill}"
                               Margin="10" FontStyle="Italic"/>
                </StackPanel>
            </DataTemplate>
        </telerikPrimitives:RadLegendControl.ItemTemplate>
    </telerikPrimitives:RadLegendControl>