WindowsPhone：RelativeSource Mode = FindAncestor，AncestorType：CannotResolve SymbolAncestorType

Question

我模板列表框。我只想在选择该项目时显示路径。

的DataTemplate中：

<DataTemplate x:Key="itplPlayerOfTheDay"> 
    <Grid> 
     ... 
     <Grid Width="50" Height="50" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,5,5,0"> 
      <Path Visibility="{Binding RelativeSource={RelativeSource Mode=FindAncestor , AncestorType={ListBoxItem}}, Path=IsSelected, Converter={StaticResource BooleanToVisibilityConverter}}" Data="M32.5569,7.54591 C32.3883,13.1553 31.3485,16.9274z" Stretch="Uniform" Stroke="Black" > 
      </Path> 
     </Grid> 
     ... 
    </Grid> 
</DataTemplate> 

Apparantly有什么不对我的XAML。在设计师说明中：无法解析符号祖先类型。

Answer 1

AncestorType在Windows Phone上不受支持。

<DataTemplate x:Key="itplPlayerOfTheDay"> 
    <Grid> 
     ... 
     <Grid Width="50" Height="50" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,5,5,0"> 
      <Path Visibility="{Binding ElementName=yourListBoxName, Path=SelectedItem, Converter={StaticResource BooleanToVisibilityConverter}}" Data="M32.5569,7.54591 C32.3883,13.1553 31.3485,16.9274z" Stretch="Uniform" Stroke="Black" > 
      </Path> 
     </Grid> 
     ... 
    </Grid> 
</DataTemplate> 

在您的BooleanToVisibilityConverter中进行一些更改并完成！