WPF图表工具包。绑定标签在ColumnDataPoint内容的ColumnSeries视图模型
问题描述:
我有一个扩展ObservableCollection
保存的数据点加上一些额外的信息WPF图表工具包。绑定标签在ColumnDataPoint内容的ColumnSeries视图模型
public class ExtendedCollection : ObservableCollection<KeyValuePair<string, int>>
{
public string dateStamp { get; set; }
}
然后我也有一个ViewModel持有使用该ExtendedCollection
private ExtendedCollection columnValues = new ExtendedCollection();
public ExtendedCollection ColumnValues
{
get
{
return columnValues;
}
set
{
columnValues = value;
PropChanged("ColumnValues");
}
}
的ColumnSeries
最后,我试图在模板中的每个数据点的列中显示集合的属性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>
我已经尝试了很多不同的Binding
S为Label
的Content
但没有工作
答
尝试改变结合 “DataContext.ColumnValues.dateStamp” 的路径:
<Label Grid.Row="0" Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type chartingToolkit:ColumnSeries}},Path=DataContext.ColumnValues.dateStamp, Mode=TwoWay}" />