OpacityMask 无法与 WPF WindowsFormsHost 一起使用？
我试图在通过 WindowsFormHost 对象托管的控件上放置圆角边框。看起来无论我为 OpacityMask 设置什么，它对渲染都没有影响。有什么我错过的吗？
这是我正在使用的 XAML 代码。子控件在运行时添加。我尝试过各种面膜组合，但没有一个对我有用。任何帮助将不胜感激。谢谢！
<WindowsFormsHost Background="#FF2BBA62" Height="414" Width="516" Margin="176.5,223,309.5,92" Name="vcxHost1" UseLayoutRounding="False" ClipToBounds="True" >
<WindowsFormsHost.OpacityMask>
<VisualBrush>
<VisualBrush.Visual>
<Rectangle Height="10" Width="100" Name="border1" />
</VisualBrush.Visual>
</VisualBrush>
</WindowsFormsHost.OpacityMask>
</WindowsFormsHost>
I'm trying to put a rounded border on a control which is hosted through a WindowsFormHost object. It seems like no matter what I set for OpacityMask, it has no effect on the rendering. Is there something I've missed?
Here is the XAML code I am using. The child control is added at run-time. I've tried various combinations of masks, none of which worked for me. Any help would be appreciated. Thanks!
<WindowsFormsHost Background="#FF2BBA62" Height="414" Width="516" Margin="176.5,223,309.5,92" Name="vcxHost1" UseLayoutRounding="False" ClipToBounds="True" >
<WindowsFormsHost.OpacityMask>
<VisualBrush>
<VisualBrush.Visual>
<Rectangle Height="10" Width="100" Name="border1" />
</VisualBrush.Visual>
</VisualBrush>
</WindowsFormsHost.OpacityMask>
</WindowsFormsHost>
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我怀疑它不起作用的原因与 z 索引不起作用的原因相同。来自链接的文档：“托管 Windows 窗体控件在单独的 HWND 中绘制，因此它始终绘制在 WPF 元素之上。”
请参阅有关布局限制的段落...
http://msdn.microsoft.com/en-us/library/ms744952.aspx
这也可能有帮助... http://msdn.microsoft .com/en-us/library/ms742522.aspx
I suspect it doesn't work for the same reason that the z-indexing doesn't work. From the linked doc: "A hosted Windows Forms control is drawn in a separate HWND, so it is always drawn on top of WPF elements."
See the paragraph on Layout Limitations ...
http://msdn.microsoft.com/en-us/library/ms744952.aspx
This may also be helpful ... http://msdn.microsoft.com/en-us/library/ms742522.aspx