public void UploadTapped(object sender, object args)
{
UploadItem clickedItem = (args as ItemClickEventArgs).ClickedItem as UploadItem;
if (clickedItem.State != UploadItem.SUCCESSFUL)
return;
const string key = "ItemToEdit";
BootStrapper.Current.SessionState[key] = clickedItem.Response;
BootStrapper.Current.NavigationService.Navigate(typeof(EditItemPage), key);
}