Binding xaml to DataSeries

[Mathew Tonsager]

Hello,

I would like to thank you in advance for reading this!

Is there a way to bind the DataSeries data to a property when customizing a BarSeries/LineSeries style?

I know you can do this if the data is set at the ItemSource level, but what about the DataSeries level?

Ex:

<Style x:Key="BarSeriesStyle" TargetType="telerikCharting:Bar">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="telerikCharting:Bar">
                    <Canvas>
                        <Rectangle x:Name="PART_DefiningGeometry"
                              Height="{TemplateBinding ItemActualHeight}"
                              Width="{TemplateBinding ItemActualWidth}"
                              RadiusX="2"
                              RadiusY="2"
                              Fill="Pink"
                              Stroke="{Binding DataItem.GradeColor}"
                              StrokeThickness="3"  />
                    </Canvas>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter TargetName="PART_DefiningGeometry" Property="Fill" Value="{StaticResource LightBrush}"/>
                            <Setter TargetName="PART_DefiningGeometry" Property="Stroke" Value="{StaticResource LightBrush}"/>
                            <!--<Setter TargetName="Border" Property="SnapsToDevicePixels" Value="true"/>-->
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

Notice the line Stroke="{Binding DataItem.GradeColor}" 

How would I bind this to a DataSeries set of information as opposed to the ItemSource set of information?

Thanks,
Matt

[Mathew Tonsager]

Hi again,

I think I have figured out why the (Stroke="{Binding DataItem.GradeColor}") binding is not working. The DataItem is not being set when I add the DataSeries using VB code.

I am trying to add a DataSeries manually in code like this:

Dim ds As New DataSeries()
        ds.Definition = New BarSeriesDefinition()
        For Each person As Person In studentList
            ds.Add(New DataPoint(person.Name, person.Grade))
        Next

Then add the DataSeries to the RadChart like this:

RadChart1.DefaultView.ChartArea.DataSeries.Add(ds)

    
So, naturally my binding won't work because my DataItem is not set for the DataSeries.

See attached picture!

How do I set the DataItem in VB for each DataSeries I create?

Thanks,
Matt

[Vladimir Milev]

Hi Mathew Tonsager,

Simply set the DataItem property to the instance of your DataPoint to the data object you require.

Kind regards,
Vladimir Milev
the Telerik team

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