Steve,

That code is executing in the pull to refresh method of the grid delegate which is a separate class from the view controller class. That is the problem.

Ah ok, 

So the trick that most people use for this situation is to pass a reference of your ViewController to the delegate, either in the constructor or maybe as a settable property.  In objective-c a delegate is more like an interface, so you can implement on your ViewController directly. But with Xamarin they make all protocols a separate object, which can make it a bit more difficult to work with. 

-SteveZ

But I cannot change the signature of the methods supplied in the delegate interface. And I do not have a constructor for the delegate class; Grid's delegate property expects an out of the box interface based class. Maybe I am misunderstading you. Can you please show me a code example ?

Hi, 

Sure. I'm just suggesting you add a reference to your ViewController on your custom IGGridViewDelegate. So in the sample, i override IGGridViewDelegate, and add a constructor that takes a reference to my ViewController. 

public partial class ViewController : UIViewController
    {
        public override void ViewDidLoad ()
        {
            base.ViewDidLoad ();

            IGGridView gridView = new IGGridView (this.View.Bounds, IGGridViewStyle.IGGridViewStyleDefault);
            gridView.Delegate = new MyDelegate (this);
            this.View.AddSubview (gridView);
        }
    }

    public class MyDelegate : IGGridViewDelegate
    {
        ViewController _vc;
        public MyDelegate(ViewController vc)
        {
            _vc = vc;
        }
    }

Hope this helps, 

-SteveZ

Got it. Too much caffeine. Thanks.