UWP: Frame to Empty Content

ContentFrame.Navigate(typeof(PageEmpty));

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Runtime.InteropServices.WindowsRuntime;

using Windows.Foundation;

using Windows.Foundation.Collections;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Controls.Primitives;

using Windows.UI.Xaml.Data;

using Windows.UI.Xaml.Input;

using Windows.UI.Xaml.Media;

using Windows.UI.Xaml.Navigation;

using demo_NavBar.Pages;

// The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409

namespace demo_NavBar

{

    /// <summary>

    /// An empty page that can be used on its own or navigated to within a Frame.

    /// </summary>

    public sealed partial class MainPage : Page

    {

        public MainPage()

        {

            this.InitializeComponent();

        }

        private void NavView_SelectionChanged(NavigationView sender, NavigationViewSelectionChangedEventArgs args)

        {

        }

        private void NavView_ItemInvoked(NavigationView sender, NavigationViewItemInvokedEventArgs args)

        {

            if (args.IsSettingsInvoked)

            {

                ContentFrame.Navigate(typeof(PageSettings));

            }

            else

            {

                switch (args.InvokedItem)

                {

                    case "Home":

                        ContentFrame.Navigate(typeof(PageHome ));

                        break;

                    case "Page1":

                        ContentFrame.Navigate(typeof(Page1));

                        break;

                    case "Page2":

                        ContentFrame.Navigate(typeof(Page2));

                        break;

                    case "Page3":

                        ContentFrame.Navigate(typeof(Page3));

                        break;

                    case "Nav Min/Max":

                        if (NavView.IsPaneOpen)

                        {

                            NavView.IsPaneOpen = false;

                        }

                        else

                        {

                            NavView.IsPaneOpen = true;

                        }

                        break;

                    case "Content on/off":

                        if(ContentFrame.Visibility == Visibility.Collapsed)

                        { ContentFrame.Visibility = Visibility.Visible ; }

                        else

                        { ContentFrame.Visibility = Visibility.Collapsed; }

                        break;

                    case "Nav0":

                        //ContentFrame.Navigate(typeof(DBNull ));*error

                        //UnloadObject(ContentFrame); //no

                        //ContentFrame.Content=null; //*Error

                        //ContentFrame.ClearValue();

                        ContentFrame.Navigate(typeof(PageEmpty));

                        break;

                }

            }

        }

    }

}

<Page

    x:Class="demo_NavBar.MainPage"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:local="using:demo_NavBar"

    xmlns:local_Pages="using:demo_NavBar.Pages"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

        <NavigationView x:Name="NavView"

                    ItemInvoked="NavView_ItemInvoked"

                    SelectionChanged="NavView_SelectionChanged"

                    >

            <NavigationView.MenuItems>

                <NavigationViewItem Content="Home" Tag="home">

                    <NavigationViewItem.Icon>

                        <FontIcon Glyph="&#xE10F;"/>

                    </NavigationViewItem.Icon>

                </NavigationViewItem>

                <NavigationViewItemSeparator/>

                <NavigationViewItemHeader Content="Main pages"/>

                <NavigationViewItem Icon="AllApps" Content="Page1" Tag="page1"/>

                <NavigationViewItem Icon="Video" Content="Page2" Tag="page2"/>

                <NavigationViewItem Icon="Audio" Content="Page3" Tag="page3"/>

                <NavigationViewItemSeparator/>

                <NavigationViewItemHeader Content="Nav View"/>

                <NavigationViewItem Icon="AllApps" Content="Nav Min/Max" Tag="NavInOut"/>

                <NavigationViewItem Icon="AllApps" Content="Content on/off" Tag="ContentOff"/>

                <NavigationViewItem Icon="AllApps" Content="Nav0" Tag="ContentNav0"/>

            </NavigationView.MenuItems>

            <Frame x:Name="ContentFrame" Margin="24">

                <Frame.ContentTransitions>

                    <TransitionCollection>

                        <NavigationThemeTransition/>

                    </TransitionCollection>

                </Frame.ContentTransitions>

            </Frame>

        </NavigationView>

    </Grid>

</Page>