How to set a Background image in UNO UWP?

Question

I am trying to put a background image, so far I have this code:

<Grid.Background>
    <ImageBrush ImageSource="ms-appx:///Assets/Windows-10-Hero-Ninja-Cat-1024x576-03a71eed2a427425.jpg" Stretch="UniformToFill"/>
</Grid.Background>

Which appears this way on UWP on Windows 10:

But when I Build the WASM or Android, the Background image does not appear.

The file property is set Build action: Content, Copy to output directory: Do not copy.

Answer 1

Uno's WASM target is still experimental and some features are not available yet. The only yet implemented background brush is SolidColorBrush.

It's implemented for iOS (source code here), but not Android.

Since you're already in a <Grid>, you can simply put your image as first element:

  <Grid>
    <Image Source="ms-appx:///Assets/Windows-10-Hero-Ninja-Cat-1024x576-03a71eed2a427425.jpg" Stretch="UniformToFill" />
    [... put your other controls here]
  </Grid>