private void DemoNativeFlowWithProduct(BUYProduct product)
        {
            if (checkoutCreationTask != null && checkoutCreationTask.State == NSUrlSessionTaskState.Running)
            {
                checkoutCreationTask.Cancel();
            }

            var cart = new BUYCart();

            cart.AddVariant(product.Variants [0]);

            var checkout = new BUYCheckout(cart);

            // Apply billing and shipping address, as well as email to the checkout
            checkout.ShippingAddress = Address;
            checkout.BillingAddress  = Address;
            checkout.Email           = "*****@*****.**";

            client.UrlScheme = "xamarinsample://";

            UIApplication.SharedApplication.NetworkActivityIndicatorVisible = true;
            checkoutCreationTask = client.CreateCheckout(checkout, (chkout, error) => {
                UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;

                if (error == null && chkout != null)
                {
                    var shippingController = new ShippingRatesTableViewController(client, chkout);
                    NavigationController.PushViewController(shippingController, true);
                }
                else
                {
                    Console.WriteLine("Error creating checkout: {0}", error);
                }
            });
        }
        private void DemoProductViewControllerWithProduct(BUYProduct product)
        {
            var productViewController = GetProductViewController();

            productViewController.LoadWithProduct(product, (success, error) => {
                if (error == null)
                {
                    if (presentViewController)
                    {
                        productViewController.PresentPortraitInViewController(this);
                    }
                    else
                    {
                        NavigationController.PushViewController(productViewController, true);
                    }
                }
            });
        }
 private void DemoProductViewControllerWithProduct(BUYProduct product)
 {
     var productViewController = GetProductViewController ();
     productViewController.LoadWithProduct (product, (success, error) => {
         if (error == null) {
             if (presentViewController) {
                 productViewController.PresentPortraitInViewController (this);
             } else {
                 NavigationController.PushViewController (productViewController, true);
             }
         }
     });
 }
        private void DemoNativeFlowWithProduct(BUYProduct product)
        {
            if (checkoutCreationTask != null && checkoutCreationTask.State == NSUrlSessionTaskState.Running) {
                checkoutCreationTask.Cancel ();
            }

            var cart = new BUYCart ();
            cart.AddVariant (product.Variants [0]);

            var checkout = new BUYCheckout (cart);

            // Apply billing and shipping address, as well as email to the checkout
            checkout.ShippingAddress = Address;
            checkout.BillingAddress = Address;
            checkout.Email = "*****@*****.**";

            client.UrlScheme = "xamarinsample://";

            UIApplication.SharedApplication.NetworkActivityIndicatorVisible = true;
            checkoutCreationTask = client.CreateCheckout (checkout, (chkout, error) => {
                UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;

                if (error == null && chkout != null) {
                    var shippingController = new ShippingRatesTableViewController (client, chkout);
                    NavigationController.PushViewController (shippingController, true);
                } else {
                    Console.WriteLine ("Error creating checkout: {0}", error);
                }
            });
        }