Why my WPF application has Drag & Drop disabled (even when AllowDrop is true)?

drag-and-drop, wpf

Solution

Solved!

The problem was that executing my app thru VisualStudio (run/debug) prevented the interop with Windows' drag & drop mechanism. Running the App as stand-alone makes it work, but cannot debug interactively.

This answer helped a lot: Visual Studio 2010 WPF Project ran in debug or relase will not allow drag and drop to any control

Problem

My WPF application inhibits the Drop of files from Windows Explorer, showing a Stop-sign cursor. I've tried setting the AllowDrop property (that of the UIElement ancestor) to true on the main window and contained controls, but no luck at all, no drag-drop events are fired. Any ideas or suggestions to find the cause?

Original source