WPF 图表工具包。将 ColumnDataPoint 中 Label 的内容绑定到 ColumnSeries ViewModel

Question

我有一个扩展的 ObservableCollection，它包含数据点和一些额外的信息

public class ExtendedCollection : ObservableCollection<KeyValuePair<string, int>>
{
    public string dateStamp { get; set; }
}

然后我还有一个 ViewModel 持有使用这个 ExtendedCollection

的 ColumnSeries

private ExtendedCollection columnValues = new ExtendedCollection();
public ExtendedCollection ColumnValues
{
    get
    {
        return columnValues;
    }
    set
    {
        columnValues = value;
        PropChanged("ColumnValues");
    }
}

最后，我试图在每个数据点的列

中模板化的标签上显示集合的属性dateStamp

<chartingToolkit:ColumnSeries Name="columnSeries" DependentValuePath="Value" IndependentValuePath="Key" ItemsSource="{Binding ColumnValues}">
    <chartingToolkit:ColumnSeries.DataPointStyle>
        <Style TargetType="chartingToolkit:ColumnDataPoint">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="chartingToolkit:ColumnDataPoint">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="30" />
                                <RowDefinition Height="*" />
                            </Grid.RowDefinitions>
                            <Label Grid.Row="0" Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type chartingToolkit:ColumnSeries}},Path=dateStamp, Mode=TwoWay}"></Label>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </chartingToolkit:ColumnSeries.DataPointStyle>
</chartingToolkit:ColumnSeries>

我为 Label 的 Content 尝试了许多不同的 Binding，但 none 有效

Answer 1

尝试将绑定路径更改为"DataContext.ColumnValues.dateStamp":

<Label Grid.Row="0" Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type chartingToolkit:ColumnSeries}},Path=DataContext.ColumnValues.dateStamp, Mode=TwoWay}" />

WPF 图表工具包。将 ColumnDataPoint 中 Label 的内容绑定到 ColumnSeries ViewModel

WPF Chart Toolkit. Bind Label's content in ColumnDataPoint to ColumnSeries ViewModel

c#

wpf

wpftoolkit