How to replicate the window transparency effect found in the new DropBox UWP app

问题

Apparently the effect is a feature introduced in the Creator's Update. Has anyone figured out the exact APIs used to pull this off? Even better would be some example code to at least help get me started.

Any help would be greatly appreciated. :]

回答1:

You should target Windows Creators Update for it to work

 using Windows.UI.Xaml.Hosting;

 //'this' is MainPage, but can be any UIElement
 var visual = ElementCompositionPreview.GetElementVisual(this);
 var brush = visual.Compositor.CreateHostBackdropBrush();
 var sprite = visual.Compositor.CreateSpriteVisual();
 sprite.Brush = brush;
 //Set to the size of the area, update on SizeChanged
 sprite.Size = new System.Numerics.Vector2(1000, 1000); 
 ElementCompositionPreview.SetElementChildVisual(this, sprite);

来源：https://stackoverflow.com/questions/43566178/how-to-replicate-the-window-transparency-effect-found-in-the-new-dropbox-uwp-app