protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);

            // Parameter is item ID
            Item = new ItemViewModel(ItemsDataSource.GetItemById((int)e.Parameter));
            //UpdateMap();
            var backStack = Frame.BackStack;
            var backStackCount = backStack.Count;

            if (backStackCount > 0)
            {
                var masterPageEntry = backStack[backStackCount - 1];
                backStack.RemoveAt(backStackCount - 1);

                // Doctor the navigation parameter for the master page so it
                // will show the correct item in the side-by-side view.
                var modifiedEntry = new PageStackEntry(
                    masterPageEntry.SourcePageType,
                    Item.Item.Number,
                    masterPageEntry.NavigationTransitionInfo
                    );
                backStack.Add(modifiedEntry);
            }

            // Register for hardware and software back request from the system
            SystemNavigationManager.GetForCurrentView().BackRequested += DetailPage_BackRequested;
        }
        protected async override void OnNavigatedTo(NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);

            var items = MasterListView.ItemsSource as List<ItemViewModel>;

            if (items == null)
            {
                items = new List<ItemViewModel>();
                var ds = await ItemsDataSource.GetAllItems();
                foreach (var item in ds)
                {
                    items.Add(new ItemViewModel(item));
                }

                MasterListView.ItemsSource = items;
            }

            if (!string.IsNullOrEmpty(e.Parameter.ToString()))
            {
                // Parameter is item ID
                var id = (int)e.Parameter;
                _lastSelectedItem =
                    items.Where((item) => item.Item.Number == id).FirstOrDefault();
            }

            UpdateForVisualState(AdaptiveStates.CurrentState);

            // Don't play a content transition for first item load.
            // Sometimes, this content will be animated as part of the page transition.
            DisableContentTransitions();
        }
 protected override void OnNavigatedFrom(NavigationEventArgs e)
 {
     base.OnNavigatedFrom(e);
     this.Item = null;
     SystemNavigationManager.GetForCurrentView().BackRequested -= DetailPage_BackRequested;
 }
 private void OnBackRequested()
 {
     // Page above us will be our master view.
     // Make sure we are using the "drill out" animation in this transition.
     this.Item = null;
     Frame.GoBack(new DrillInNavigationTransitionInfo());
 }
        private void MasterListView_ItemClick(object sender, ItemClickEventArgs e)
        {
            var clickedItem = (ItemViewModel)e.ClickedItem;
            _lastSelectedItem = clickedItem;
            UpdateMap();

            if (AdaptiveStates.CurrentState == NarrowState)
            {
                // Use "drill in" transition for navigating from master list to detail view
                Frame.Navigate(typeof(DetailPage), clickedItem.Item.Number, new DrillInNavigationTransitionInfo());
            }
            else
            {
                // Play a refresh animation when the user switches detail items.
                EnableContentTransitions();
            }
        }