在Windows Universal App上拖放文件

Question

How to Drag and drop a file on Windows Universal App?

The only tutorial I've found, is this one: https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/XamlDragAndDrop

However it operates on XAML UI objects, while I have a DirectX game and don't use XAML at all.

All I want is to drag and drop a file onto the Application Window (not a single UI element but the entire window), and in an event callback get the file full path.

I'm using C++, this needs to be for Windows 10 Universal App.

Answer 1

Could you please let me know why you don't want to use XAML for such kind of scenario? Since the UWP XAML UI controls have very convenient support for drag-drop feature, and it also supports interop with DX via C++. This online tutorial could be helpful. From this online help, you can find out that you could customize your own control to not show UI at all.

And if you want to implement dragging and dropping files without the help of XAML, it would require tremendous work: Dragging file to your UWP game means to share data among apps, so your implementation needs to follow UWP data sharing pattern , which means you need to re-code everything XAML UIElement has already encapsulated, eg: implementing DropTarget Control Pattern.

For you case, if you only want to open file, then File Picker is more simple and convenient. If you still want to support drag and drop, it is high recommended to interop XAML and DX. Here you can find useful guideline . You can build the app in C++, which would meet your concern about conserving memory and improving performance.

Please let me know if you have any question.