.net Silverlight 4 RelativeSource FindAncestor 绑定
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Silverlight 4 RelativeSource FindAncestor binding
提问by David
Will there be RelativeSource FindAncestor, AncestorType... in Silverlight 4?
Silverlight 4 中是否会有RelativeSource FindAncestor、AncestorType...？
回答by AnthonyWJones
In Silverlight 4 the RelativeSourceproperty of Bindingstill only supports "Self" and "TemplatedParent", there is no change from Silverlight 3 in this area.
在 Silverlight 4 中的RelativeSource属性Binding仍然只支持“Self”和“TemplatedParent”，这方面与 Silverlight 3 没有变化。
回答by Drew Noakes
RelativeSource AncestorTypeis supported in Silverlight 5, which is available now.
RelativeSource AncestorTypeSilverlight 5 支持，现在可用。
<TextBlock Text="{Binding Name}"
FontSize="{Binding DataContext.CustomFontSize,
RelativeSource={RelativeSource AncestorType=UserControl}}"
/>
回答by Ralph Shillington
Perhaps you could instantiate the ViewModel in the XMAL as a static resource then reference that as the source in your binding.
也许您可以将 XMAL 中的 ViewModel 实例化为静态资源，然后将其作为绑定中的源引用。
<UserControl.Resources>
<vm:MainPageViewModel x:Key="ViewModel"/>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White" DataContext="{Binding Source={StaticResource ViewModel}}">
<ListBox ItemsSource="{Binding Partitions}">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel FlowDirection="LeftToRight" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Button Margin="10,0" Width="40" Content="{Binding}" Command="{Binding Source={StaticResource ViewModel}, Path=ButtonCommand}" CommandParameter="{Binding}"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
