Window 带圆角 WinUI 3

Question

I need the rounded corners in my UWP(WinUI 2) application, but how I understand, it is impossible. So I found github issues, that says what WinUI 3 allows you to create a rounded corners on windows(like in new windows search). Maybe someone can help me with this?

Answer 1

On controls that support it, all you need to do is set the CornerRadius property. How to use styles to set this throughout your application is explained in here: https://docs.microsoft.com/en-us/windows/uwp/design/style/rounded-corner

How to set this on individual controls specifically is documented here: Control.CornerRadius Property

<Button Content="Button" 
        CornerRadius="15" />

<Border BorderThickness="5"
        BorderBrush="Black"
        CornerRadius="15" />

You can easily see this in action in Xaml Studio

If you are asking if setting this property on a Page is directly supported, I think the answer is not yet . I have not seen any documentation to suggest that it is.
See: Creating chromeless, non-rectangular Windows from UWP or Is it possible to create a borderless UWP application? for possible workarounds.