附加属性仅适用于Canvas的直接子级。ItemsControl会将ContentPresenter控件放置为其直接子控件，因此您可能还需要为其添加样式：
<ItemsControl ItemsSource="{Binding Path=Nodes}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Canvas /> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemContainerStyle> <Style TargetType="ContentPresenter"> <Setter Property="Canvas.Left" Value="{Binding Path=XPos}" /> <Setter Property="Canvas.Top" Value="{Binding Path=YPos}" /> </Style> </ItemsControl.ItemContainerStyle></ItemsControl>
