Unable to cast Gtk.NodeView into other Classes.

[Mascasc]

I have a function, as below, attached to a NodeView widget:

`protected void onSongSelected(object o, RowActivatedArgs args)
{
object selection = o;
}'

By using GetType() I have been able to verify that o (and thus selection also) is of type Gtk.NodeView().

However, I've been reading through this tutorial from Mono for working with Treeview and Nodeview Gtk# widgets: https://www.mono-project.com/docs/gui/gtksharp/widgets/nodeview-tutorial/

And, when I try object selection = (NodeSelection)o; I get an error saying that object o can not be cast into the class NodeSelection. I would like to be able to access other information associated with my node, and hoped to do so via the method illustrated in the guide. But I remain unable to change the class of variable o in any way.

Is there something I am doing incorrectly that is causing this problem?

[awittaker]

It looks like an old fixed bug has re-appeared (gtk-sharp2: 2.12.45-0)
https://bugzilla.xamarin.com/show_bug.cgi?id=51688

This workaround works for me...

using System.Reflection;
...
nodeview.NodeStore = nodestore;
typeof (NodeView).GetField ("store", BindingFlags.Instance | BindingFlags.NonPublic).SetValue (nodeview, nodestore);

See also #242 "Gtk.NodeView(NodeStore) constructor does not work (but NodeStore property does)"