WPF在ItemsControl的ToolTip中显示来自多个DataContexts的数据

   <ItemsControl.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Name}">
                <TextBlock.ToolTip>
                    <ToolTip>
                        <ToolTip.DataContext>
                           <MultiBinding Converter="{StaticResource MultiValueConverter}">
                               <Binding Path="DataContext" RelativeSource="{RelativeSource AncestorType=ItemsControl}"/>
                               <Binding Path="DataContext" RelativeSource="{RelativeSource AncestorType=ToolTip}"/>
                            </MultiBinding>
                        </ToolTip.DataContext>
                       <StackPanel>
                            <TextBlock Text="{Binding Name}"/>
                            <TextBlock Text="{Binding Description}"/>
                        </StackPanel>
                    </ToolTip>
                </TextBlock.ToolTip>
            </TextBlock>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>