C# 如何在 WPF 中的元素上添加半透明阴影？
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How to add a semi-transparent shade over elements in WPF?
提问by NoizWaves
I would like to add a semi-transparent colour over the contents of a WPF window (to indicate the state of the window). Currently I am using a UserControl that fills the Window, and I change the Background colour and Visibility as required.
我想在 WPF 窗口的内容上添加半透明颜色（以指示窗口的状态）。目前我正在使用填充窗口的 UserControl，并根据需要更改背景颜色和可见性。
The problem with this method is when the UserControl is visible, I cannot click any controls (Buttons, CheckBoxes) in the Window behind the UserControl. I guess I need to make the UserControl transparent to clicks somehow. Is this possible, or is there a better way to add the colour over the Window?
此方法的问题是当 UserControl 可见时，我无法单击 UserControl 后面的窗口中的任何控件（按钮、复选框）。我想我需要以某种方式使 UserControl 对点击透明。这是可能的，还是有更好的方法在窗口上添加颜色？
采纳答案by Drew Noakes
You could set IsHitTestVisibleto Falseon your masking element.
您可以在掩蔽元素上设置IsHitTestVisible为False。
<Grid>
<Button>Background Button</Button>
<Rectangle Fill="Blue" Opacity="0.25" IsHitTestVisible="False"/>
</Grid>
Try that XAML out in something like Kaxaml. You will still be able to click the button, yet the blue rectangle will be presented over the top. It is semi-transparent due to the low opacity setting.
在Kaxaml 之类的东西中尝试使用 XAML 。您仍然可以单击该按钮，但蓝色矩形将显示在顶部。由于低不透明度设置，它是半透明的。
回答by orcun
There is an IsHitTestVisible property.
有一个 IsHitTestVisible 属性。
