Any sample code for NSCollectionView Drag and Drop?

Question

I'm trying to add drag and drop functionality to my NSCollectionView. I've found a couple of tutorials that deal with the process in Swift, but there are probably at least half a dozen methods to override and I'm finding that the translation to C# is difficult, e.g. even registering the collection view for dragging

in Swift - collectionView.registerForDraggedTypes([NSURLPboardType])

What's the equivalent of NSURLPboardType in Xamarin?

If anyone is aware of a sample project that does this for Mac in C#?

Answer 1

NSURLPBoardType is a string[]

You can find the binding documentation in the .Net API Explorer at NSView.RegisterForDraggedTypes() Method

[Foundation.Export("registerForDraggedTypes:")]  
public virtual void RegisterForDraggedTypes (string[] newTypes);  

This matches Apple's docs, which show NSPasteboardType is a typedeffed string*

typedef NSString *NSPasteboardType;  

I'm not aware of a full sample, but there is a C# code snippet (unverified and a few years old, but it should get you pointed in the right direction) on StackOverflow in the answer to How I can use a DataObject on MacOS (Drag and Drop files).