如何在Silverlight 4中向ContextMenu控件添加子菜单？
我有以下 XAML 代码：
<controlsInputToolkit:ContextMenuService.ContextMenu>
<controlsInputToolkit:ContextMenu
Height="75"
Width="200"
IsOpen="False"
Visibility="Collapsed"
Closed="mnuPopup_Closed"
x:Name="mnuPopup">
<controlsInputToolkit:MenuItem
x:Name="mnuAnswer911Call"
Header="Answer Call"
Click="mnuAnswer911Call_Click"
IsEnabled="True"/>
<controlsInputToolkit:MenuItem
x:Name="mnuHangup911Call"
Header="Hangup call"
Click="mnuHangup911Call_Click"
IsEnabled="True"/>
</controlsInputToolkit:ContextMenu>
</controlsInputToolkit:ContextMenuService.ContextMenu>
比方说，根据上下文，我想向 mnuAnswer911Call 菜单项添加一个子菜单。我该怎么办呢？
I have the following piece of XAML code:
<controlsInputToolkit:ContextMenuService.ContextMenu>
<controlsInputToolkit:ContextMenu
Height="75"
Width="200"
IsOpen="False"
Visibility="Collapsed"
Closed="mnuPopup_Closed"
x:Name="mnuPopup">
<controlsInputToolkit:MenuItem
x:Name="mnuAnswer911Call"
Header="Answer Call"
Click="mnuAnswer911Call_Click"
IsEnabled="True"/>
<controlsInputToolkit:MenuItem
x:Name="mnuHangup911Call"
Header="Hangup call"
Click="mnuHangup911Call_Click"
IsEnabled="True"/>
</controlsInputToolkit:ContextMenu>
</controlsInputToolkit:ContextMenuService.ContextMenu>
Let's say, based on context, I wanted to add a submenu to the mnuAnswer911Call menu item. How would I go about it?
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Silverlight 上下文菜单尚不支持子菜单。但有一些开源替代方案可以帮助您实现这一目标。这是一个：
www.sl4popupmenu.codeplex.com
The Silverlight Context Menu does not support submenus yet. But there are open source alternatives to help you achieve this. Here is one:
www.sl4popupmenu.codeplex.com