设置 UWP NavigationView 内容到页面显示页面的类型名称

Question

I'm using XAML Islands to display a UWP NavigationView control from within a .NET Core WPF application window (I don't need the whole navigation infrastructure -- I just want the navigation view control). I also have a class derived from Page called Home that I want to use to display content in the control's frame. When I set the frame's content to an object of the Home class, I see the Home object's type name in the frame's content, as if ToString() was being called on the object rather than getting its content rendered. What am I missing?

using System.Windows;
using MyApp.Wpf.Pages;
using Windows.UI.Xaml.Controls;

namespace MyApp.Wpf
{
    public partial class MainWindow : Window
    {
        private Frame navigationFrame;

        public MainWindow()
        {
            InitializeComponent();
            uwpNavigationView.ChildChanged += uwpNavigationView_ChildChanged;
        }

        private void uwpNavigationView_ChildChanged(object sender, System.EventArgs e)
        {
            if (uwpNavigationView.Child is NavigationView navigationView)
            {
                var homeItem = new NavigationViewItem()
                {
                    Content = "Home",
                    Icon = new FontIcon()
                    {
                        Glyph = "\uE80F",
                    }
                };
                navigationView.MenuItems.Add(homeItem);
                navigationFrame = new Frame();
                navigationView.Content = navigationFrame;
                navigationView.SelectionChanged += NavigationView_SelectionChanged;
            }
        }

        private void NavigationView_SelectionChanged(NavigationView sender, NavigationViewSelectionChangedEventArgs args)
        {
            if(args.SelectedItem is NavigationViewItem item)
            {
                var homePage = new Home();
                navigationFrame.Content = homePage; // homepage.ToString() rendered here?
            }
        }
    }
}

Answer 1

A UWP Windows.UI.Xaml.Controls.Frame cannot render WPF System.Windows.Controls.Page elements.

You should set the Content property to a UWP Windows.UI.Xaml.Controls.Page or use a WPF System.Windows.Controls.Frame .