WindowsPhone：RelativeSource Mode = FindAncestor，AncestorType：CannotResolve SymbolAncestorType

Question

我正在模仿列表框。我只想在选择项目时显示路径。

DataTemplate：

<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>

我的XAML显然有问题。在设计器中是状态：无法解析符号祖先类型。

Answer 1

Windows Phone不支持AncestorType。

<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BooleanToVisibilityConverter中进行一些更改并完成！