透明背景在 WPF 中变黑 [英] Transparent background goes black in WPF

问题描述

我尝试创建一个带圆角的窗口.我将窗口背景设置为透明并将边框背景设置为白色.但是在边框和窗口之间的区域，我得到黑色背景而不是透明.

I try to create a window with rounded corner. I set Window background to transparent and set the border background to white. However on the region between the border and the window, I get black background instead of transparent.

我在 C# WPF、VS2010 上在 Window 7 上开发.下面是我的 XAML 和屏幕截图.

I develop on C# WPF, VS2010 on Window 7. Below is my XAML and Screenshot.

XAML:

<Window WindowStyle="None" Background="Transparent">
    <Border BorderBrush="Black" BorderThickness="1" CornerRadius="25" Background="White">
        <Grid>
            ... some content ...
        </Grid>
    </Border>
</Window>

屏幕截图:

推荐答案

您还需要在 Window 标签上设置 AllowsTransparency="True" 以使用透明窗口背景

You also need to set AllowsTransparency="True" on your Window tag to use a Transparent Window Background

<Window WindowStyle="None" 
        Background="Transparent" 
        AllowsTransparency="True">

</Window>

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