我有一个菜单，要求我设计样式，使项目具有圆角......基本上使它们看起来像按钮。
我想更改子菜单后面的黑色背景，使其透明。白色也可以啊
这个黑色不是子项目按钮的边框，因为我可以将其设置为黄色，并且我看到轻微的黄色边框，但仍然看到黑色背景。
作为测试，我将所有黑色实例更改为紫色，但仍然得到黑色背景。所以我无法判断它是从哪里来的。
谢谢。
I have a menu that I've been asked to style so that the items have rounded corners... basically so that they look like buttons.
I want to change the black background behind the sub-menu so that it's transparent. White would be OK too.
This black isn't the border of the child item's buttons as I can set that to yellow and I see a slight yellow border but still see the black background.
I changed all the instances of black to purple as a test and still got this black background. So I can't tell where it's coming from.
Thanks.
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您需要重新设计菜单。 此处是默认情况下如何完成此操作的示例。查看 中的 ，将
Popup，您需要将其替换为您的实现。也许您只需要删除ScrollViewer直接作为Popup的子级。You'll need to restyle the menu. Here is the example of how it's done by default. Look at the
Popupin<ControlTemplate x:Key="{x:Static MenuItem.TopLevelHeaderTemplateKey}" ..., you'll need to replace it with your implementation. Perhaps you just need to remove<Border Name="SubmenuBorder"..., putting theScrollViewerdirectly as a child ofPopup.成功！为了使弹出窗口的边框背景透明，您需要在弹出窗口元素上设置AllowsTransparency =“True”。
Success! In order for the Popup's Border's background to be transparent you need to set AllowsTransparency="True" on the Popup element.