Xamarin.Mac dock icon does not accept drag and drop files

Question

My application does not accept drag and drop files on the Dock icons like other applications.

For example, the dock icon in Visual Studio for Mac accepts the file, but when I build and run the default project, it does not accept the drag and drop of the dock icon.

Perhaps I need to configure something in Xcode, but how can I do that?

Also, what kind of code should I write to receive the file path dragged and dropped to the dock icon in ViewController?

Answer 1

I solved this problem myself.

First, open the info.plist in your project and click the Advanced tab in the bottom of window, and then Add Document Type button.

Select Document in Class item, and for Identifier, enter public.item. For Role, set it to None.

Then you will be able to drag and drop it to the Dock icon.

Then write the code can receive the dragged and dropped files in the program side.

AppDelegate.cs

public override void OpenUrls(NSApplication application, NSUrl[] urls)
{
  //base.OpenUrls(application, urls);
  var alert = new NSAlert();
  alert.MessageText = "AppDelegate.OpenUrls()";
  alert.InformativeText = urls[0].AbsoluteString;
  alert.AddButton("Ok");
  alert.RunModal();
}

ref. https://forums.xamarin.com/discussion/158538/xamarin-mac-appdelegate-openurls-not-invoked

Now you can receive and view the information about the dragged and dropped files.