[Solved] Legend Trouble in code behind

[Jeff Kershner]

I am binding my data like this:

foreach (MarketShareData data in marketShareData)
{
    DataSeries lineSeries = new DataSeries();
    lineSeries.Definition = new LineSeriesDefinition();
    lineSeries.Add(new DataPoint() { YValue = data.marketshare0, XCategory = data.timeStamp0.ToShortDateString(), LegendLabel = data.company, Label = data.company });
    lineSeries.Add(new DataPoint() { YValue = data.marketshare1, XCategory = data.timeStamp1.ToShortDateString(), LegendLabel = data.company, Label = data.company });
    lineSeries.Add(new DataPoint() { YValue = data.marketshare2, XCategory = data.timeStamp2.ToShortDateString(), LegendLabel = data.company, Label = data.company });
    lineSeries.Add(new DataPoint() { YValue = data.marketshare3, XCategory = data.timeStamp3.ToShortDateString(), LegendLabel = data.company, Label = data.company });
    lineSeries.Add(new DataPoint() { YValue = data.marketshare4, XCategory = data.timeStamp4.ToShortDateString(), LegendLabel = data.company, Label = data.company });
    lineSeries.Definition.ShowItemLabels = false;
    chart.DefaultView.ChartArea.DataSeries.Add(lineSeries);
}

The Line Chart legend still shows Series 0, Series 1, Series 2, etc... as the legend text.  Shouldn't it show the LegendLabel as it is bound above?

Also, how do you get rid of the title of the legend which by default is "Legend"?

Thanks,
--Jeff

[Yavor]

Hello Jeff Kershner,

You should set the LegendLabel of the series like this:

lineSeries.LegendLabel = "<My Label>";

Setting the LegendLabel on the data point can be used when you want to use DataPointLabel mode for the ChartLegend. You can read more on Legend display modes in our help topic here.

Best wishes,
Yavor Ivanov
the Telerik team

[Jeff Kershner]

Thanks, that worked... The last problem I am having is with the background of the spider label.

I am using the palette for the spider lines and this is working well.  How do I change the background of the spider labels to be transparent?

[Bartholomeo Rocca]

Hi,

You need to set custom label style as demonstrated here: http://demos.telerik.com/silverlight/#Chart/NegativeValues.


Greetings,
Bart.

[Jeff Kershner]

I am failing to see how to change the background colors of the spider labels in the example that you sent.

[Yavor]

Hello Jeff Kershner,

You can change the Item Labels' background by applying a custom style to the SeriesItemLabel like this:

<Style x:Key="SeriesItemLabelStyle"
      TargetType="telerik:SeriesItemLabel">
                    <Setter Property="HorizontalContentAlignment" Value="Center" />
                    <Setter Property="Padding" Value="2,0" />
                    <Setter Property="IsHitTestVisible" Value="False"/>
                    <Setter Property="Foreground" Value="Black"/>
                    <Setter Property="Template" >
                        <Setter.Value>
                            <ControlTemplate TargetType="telerik:SeriesItemLabel">
                                <Canvas x:Name="PART_MainContainer">
                                    <Path
                               Visibility="{TemplateBinding ConnectorVisibility}"
                               Style="{TemplateBinding ConnectorStyle}"
                               Stroke="{TemplateBinding Stroke}"
                               StrokeThickness="{TemplateBinding StrokeThickness}">
                                        <Path.Data>
                                            <PathGeometry >
                                                <PathGeometry.Figures>
                                                    <PathFigure x:Name="PART_Connector">
                                                        <PathFigure.Segments>
                                                            <PolyLineSegment />
                                                        </PathFigure.Segments>
                                                    </PathFigure>
                                                </PathGeometry.Figures>
                                            </PathGeometry>
                                        </Path.Data>
                                    </Path>
                                    <Border
                                x:Name="PART_TextContainer"
                                Style="{TemplateBinding LabelStyle}"
                                BorderBrush="{TemplateBinding Stroke}">
                                        <TextBlock
                                    TextAlignment="{TemplateBinding HorizontalContentAlignment}"
                                    Margin="{TemplateBinding Padding}"
                                    Text="{TemplateBinding Content}" />
                                    </Border>
                                </Canvas>
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>

You can read more on styling the Item Labels in this topic in our help system.

Regards,
Yavor Ivanov
the Telerik team