C# WPF图表工具包。将图例内容绑定到ColumnSeries ViewModel

我有一个

LegendItemStyle

在

ColumnSeries

<chartingToolkit:ColumnSeries DependentValuePath="Value" IndependentValuePath="Version" ItemsSource="{Binding ColumnValues}" IsSelectionEnabled="True">
    <chartingToolkit:ColumnSeries.LegendItemStyle>
        <Style TargetType="chartingToolkit:LegendItem" >
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type chartingToolkit:LegendItem}">
                        <Border BorderBrush="Black" BorderThickness="0">
                            <StackPanel>
                                <StackPanel Orientation="Horizontal" >
                                    <Rectangle Width="12" Height="12" Fill="{DynamicResource DesktopBrush}" StrokeThickness="1"  />
                                    <visualizationToolkit:Title Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type chartingToolkit:ColumnSeries}},Path=DataContext.ColumnValues.Legend1, Mode=TwoWay}" Foreground="{Binding ElementName=chart,Path=Tag}" FontSize="18" Margin="10"/>
                                </StackPanel>
                            </StackPanel>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </chartingToolkit:ColumnSeries.LegendItemStyle>
  ...
</chartingToolkit:ColumnSeries>

我无法将

LegendItem

的

标题

内容

绑定到ViewModel中

列值

的属性

Legend1

Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type chartingToolkit:ColumnSeries}},Path=DataContext.ColumnValues.Legend1, Mode=TwoWay}

---

尝试绑定到父元素的

Legend

元素的

DataContext

：

xmlns:dataVisualization="clr-namespace:System.Windows.Controls.DataVisualization;assembly=System.Windows.Controls.DataVisualization.Toolkit"
...
<visualizationToolkit:Title Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type dataVisualization:Legend}},Path=DataContext.ColumnValues.Legend1, Mode=TwoWay}"/>

xmlns:dataVisualization=“clr命名空间：System.Windows.Controls.dataVisualization；assembly=System.Windows.Controls.dataVisualization.Toolkit”
...

xmlns:dataVisualization="clr-namespace:System.Windows.Controls.DataVisualization;assembly=System.Windows.Controls.DataVisualization.Toolkit"
...
<visualizationToolkit:Title Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type dataVisualization:Legend}},Path=DataContext.ColumnValues.Legend1, Mode=TwoWay}"/>