Hide Legend Items

[SUMO]

Hi,

I have a situation where I need to hide series on a bar chart.

I can hide the series by doing this...

//hide unused series
barChart.DefaultView.ChartArea.DataSeries[1].Definition.Visibility = SeriesVisibility.Collapsed;

however, the series stays in the legend. So I need to remove it there too.

But this doesn't work... how do I hide the series from the legend as well?

barChart.DefaultView.ChartLegend.Items[1].Visibility = Visibility.Collapsed;

Here's my XAML where I specify 2 series...

<telerikControls:RadChart x:Name="barChart" Grid.Column="1" Grid.Row="3" Height="475" Width="720" HorizontalAlignment="Left" Background="Transparent" BorderThickness="0" AxisForeground="White" AxisElementBrush="White" >
            <telerikControls:RadChart.PaletteBrushes>
                <SolidColorBrush   Color="#009ad4" />
                <SolidColorBrush   Color="#bfe9f5" />
            </telerikControls:RadChart.PaletteBrushes>
            <telerikControls:RadChart.DefaultView>
                <telerikCharting:ChartDefaultView ChartLegendPosition="Top">
                    <telerikCharting:ChartDefaultView.ChartArea>
                        <telerikCharting:ChartArea LegendName="ChartLegend1"></telerikCharting:ChartArea>
                    </telerikCharting:ChartDefaultView.ChartArea>
                    <telerikCharting:ChartDefaultView.ChartLegend>
                        <telerikCharting:ChartLegend BorderThickness="0" Header="" x:Name="ChartLegend1" Background="Transparent">
                        </telerikCharting:ChartLegend>
                    </telerikCharting:ChartDefaultView.ChartLegend>
                </telerikCharting:ChartDefaultView>
            </telerikControls:RadChart.DefaultView>

            <!--SERIES MAPPING -->
            <telerikControls:RadChart.SeriesMappings>
                <telerikCharting:SeriesMapping LegendLabel="2011" >
                    <telerikCharting:SeriesMapping.SeriesDefinition>
                        <telerikCharting:BarSeriesDefinition ItemStyle="{StaticResource BarStyle}"></telerikCharting:BarSeriesDefinition>
                    </telerikCharting:SeriesMapping.SeriesDefinition>
                    <telerikCharting:SeriesMapping.ItemMappings>
                        <telerikCharting:ItemMapping FieldName="Title" DataPointMember="XCategory"></telerikCharting:ItemMapping>
                        <telerikCharting:ItemMapping FieldName="Dec" DataPointMember="YValue"></telerikCharting:ItemMapping>
                    </telerikCharting:SeriesMapping.ItemMappings>
                </telerikCharting:SeriesMapping>
                <telerikCharting:SeriesMapping LegendLabel="2010">
                    <telerikCharting:SeriesMapping.SeriesDefinition>
                        <telerikCharting:BarSeriesDefinition ItemStyle="{StaticResource BarStyle}"></telerikCharting:BarSeriesDefinition>
                    </telerikCharting:SeriesMapping.SeriesDefinition>
                    <telerikCharting:SeriesMapping.ItemMappings>
                        <telerikCharting:ItemMapping FieldName="Title" DataPointMember="XCategory"></telerikCharting:ItemMapping>
                        <telerikCharting:ItemMapping FieldName="Dec" DataPointMember="YValue"></telerikCharting:ItemMapping>
                    </telerikCharting:SeriesMapping.ItemMappings>
                </telerikCharting:SeriesMapping>
            </telerikControls:RadChart.SeriesMappings>
        </telerikControls:RadChart>

And my onload where I hide the series...

private void UserControl_Loaded(object sender, RoutedEventArgs e)

        {

            //perform extra styling on load

            barChart.DefaultView.ChartTitle.Visibility = Visibility.Collapsed;

            barChart.DefaultView.ChartArea.AxisY.StripLinesVisibility = Visibility.Hidden;

            barChart.DefaultView.ChartArea.AxisY.MajorGridLinesVisibility = Visibility.Visible;

            barChart.DefaultView.ChartArea.AxisY.AxisStyles.ItemLabelStyle = this.Resources["AxisYLabelStyle"] as Style;

            

            //attach click event

            barChart.DefaultView.ChartArea.ItemClick +=new EventHandler<ChartItemClickEventArgs>(ChartArea_ItemClick);

 

            //Set itemsource

            barChart.ItemsSource = ItemsSource.Items;

 

            //hide unused series

            barChart.DefaultView.ChartArea.DataSeries[1].Definition.Visibility = SeriesVisibility.Collapsed;

   
//doesn't hide legend item...
barChart.DefaultView.ChartLegend.Items[1].Visibility = Visibility.Collapsed;

        }

Thanks!

Ken

[Evgenia]

Hi Sumo,

The expected behavior is that the LegendLabel of the Series should be visible no matter if the Series visibility is collapsed or hidden. However there is a workaround you could use in your case.

If you set the series' LegendDisplayMode to None and then set the series' Visibility to Collapsed, this will hide both the series and the legend label.

For example:

mySeriesMapping.SeriesDefinition.LegendDisplayMode = LegendDisplayMode.None;
mySeriesMapping.SeriesDefinition.Visibility = SeriesVisibility.Collapsed;

Note that the LegendDisplayMode should be defined first. Also this will work only for Visibility set to Collapsed.

Best wishes,
Evgenia
the Telerik team