Question

I m 试图对在项目设计书内保存的<编码>TextBlock的可见性财产进行约束,以备对文本Block号母体清单中独有的财产持有一份清单。

随着这一标记,案文Block总是显而易见的。

<ListView x:Name="ItemListView" ItemsSource="{Binding Path=Accounts}" Margin="60,0,0,10" Grid.Row="1" Grid.Column="0">
    <ListView.ItemTemplate>
        <DataTemplate>
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="100">
                    </ColumnDefinition>
                    <ColumnDefinition Width="*"></ColumnDefinition>
                    <ColumnDefinition Width="200"></ColumnDefinition>
                </Grid.ColumnDefinitions>
                <Image Width="100" Height="100" Grid.Column="0"></Image>
                <StackPanel Grid.Column="1">
                    <TextBlock Text="{Binding Path=Account.Name}"  
                                FontSize="24" Margin="5,0,0,0" TextWrapping="Wrap" />
                </StackPanel>
                <TextBlock Grid.Column="3" VerticalAlignment="Bottom"
                            Visibility="{Binding RelativeSource={RelativeSource Mode=TemplatedParent}, Path=IsSelected, Converter={StaticResource boolConverter}, Mode=OneWay}">
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                </TextBlock>
            </Grid>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

Notes: 1. In case it makes any difference, this is WinRT; a Metro app written in C#. 2. boolConverter is a fairly standard converter appears to work correctly.

Answer 1

Use Mode=FindAncestor:

<TextBlock Grid.Column="3" VerticalAlignment="Bottom"
          Visibility="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ListViewItem}, Path=IsSelected, Converter={StaticResource boolConverter}, Mode=OneWay}">

Answer 2

我认为,在这种情况下,你必须使用。 ElementName =ItemListView

Answer 3

@Murven的回答已经结束。这对我来说是行之有效的:

<TextBlock Visibility="{Binding DataContext.IsSelected, ElementName=ItemListView Converter={StaticResource boolConverter}, Mode=OneWay}">

I had to use DataContext.IsSelected to access the context of the ItemListView. Not sure if there is a better way.

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