實現兩個頁面之間的導航

重要的 API：Windows.UI.Xaml.Controls.Frame 類， Windows.UI.Xaml.Controls.Page 類 Windows.UI.Xaml.Navigation命名空間

在C#的通用桌面應用中加入2個空白頁面：Page1，Page2.

<Grid>
        <TextBlock x:Name="pageTitle" Text="Page1" />
        <StackPanel>
            <TextBlock HorizontalAlignment
 
="Center" Text="Enter your name"/>
            <TextBox HorizontalAlignment="Center" Width="200" Name="name"/>
            <HyperlinkButton Content="Click to go to page 2" 
                     Click="HyperlinkButton_Click"
                     HorizontalAlignment="Center" RenderTransformOrigin
 
="0.475,3.859" VerticalAlignment="Center"/>
        </StackPanel>
 </Grid>

在Page1.xaml中加入HyperlinkButton元素，添加Click事件轉至Page2。

<Grid>
        <TextBlock x:Name="pageTitle" Text="Page2" />
        <StackPanel>
            <TextBlock HorizontalAlignment="Center"
 
 Name="greeting"/>
            <HyperlinkButton Content="Click to go to page 1" 
                     Click="HyperlinkButton_Click"
                     HorizontalAlignment="Center"/>
        </StackPanel>
        <Button x:Name="BackButton" VerticalAlignment="Top" HorizontalAlignment="Left" Click="Back_Click" Style="{StaticResource NavigationBackButtonNormalStyle}"/>
 </Grid>

public sealed partial class Page1 : Page
    {
        public Page1()
        {
            this.InitializeComponent();
            this.NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Enabled;
        }

        private void HyperlinkButton_Click(object sender, RoutedEventArgs e)
        {
            this.Frame.Navigate(typeof(Page2), name.Text);
        }
    }

 public sealed partial class Page2 : Page
    {
        public Page2()
        {
            this.InitializeComponent();
        }

        private void HyperlinkButton_Click(object sender, RoutedEventArgs e)
        {
            this.Frame.Navigate(typeof(Page1));
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            BackButton.IsEnabled = this.Frame.CanGoBack;
            if (e.Parameter is string && !string.IsNullOrWhiteSpace((string)e.Parameter))
            {
                greeting.Text = $"Hi, {e.Parameter.ToString()}";
            }
            else
            {
                greeting.Text = "Hi!";
            }
            base.OnNavigatedTo(e);
        }

        private void Back_Click(object sender, RoutedEventArgs e)
        {
            On_BackRequested();
        }

        // Handles system-level BackRequested events and page-level back button Click events
        private bool On_BackRequested()
        {
            if (this.Frame.CanGoBack)
            {
                this.Frame.GoBack();
                return true;
            }
            return false;
        }

        private void BackInvoked(KeyboardAccelerator sender, KeyboardAcceleratorInvokedEventArgs args)
        {
            On_BackRequested();
            args.Handled = true;
        }
    }

App.xaml.cs代碼如下：

sealed partial class App : Application
    {
        /// <summary>
        /// 初始化單一實例應用程序對象。這是執行的創作代碼的第一行，
        /// 已執行，邏輯上等同於 main() 或 WinMain()。
        /// </summary>
        public App()
        {
            this.InitializeComponent();
            this.Suspending += OnSuspending;
        }
       
        /// <summary>
        /// 在應用程序由最終用戶正常啟動時進行調用。
        /// 將在啟動應用程序以打開特定文件等情況下使用。
        /// </summary>
        /// <param name="e">有關啟動請求和過程的詳細信息。</param>
        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
            Frame rootFrame = Window.Current.Content as Frame;

            // 不要在窗口已包含內容時重復應用程序初始化，
            // 只需確保窗口處於活動狀態
            if (rootFrame == null)
            {
                // 創建要充當導航上下文的框架，並導航到第一頁
                rootFrame = new Frame();

                rootFrame.NavigationFailed += OnNavigationFailed;

                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    //TODO: 從之前掛起的應用程序加載狀態
                }

                // 將框架放在當前窗口中
                Window.Current.Content = rootFrame;
            }

            if (e.PrelaunchActivated == false)
            {
                if (rootFrame.Content == null)
                {
                    // 當導航堆棧尚未還原時，導航到第一頁，
                    // 並通過將所需信息作為導航參數傳入來配置
                    // 參數
                    rootFrame.Navigate(typeof(Page1), e.Arguments);
                }
                // 確保當前窗口處於活動狀態
                Window.Current.Activate();
            }
        }

        /// <summary>
        /// 導航到特定頁失敗時調用
        /// </summary>
        ///<param name="sender">導航失敗的框架</param>
        ///<param name="e">有關導航失敗的詳細信息</param>
        void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
        }

        /// <summary>
        /// 在將要掛起應用程序執行時調用。  在不知道應用程序
        /// 無需知道應用程序會被終止還是會恢復，
        /// 並讓內存內容保持不變。
        /// </summary>
        /// <param name="sender">掛起的請求的源。</param>
        /// <param name="e">有關掛起請求的詳細信息。</param>
        private void OnSuspending(object sender, SuspendingEventArgs e)
        {
            var deferral = e.SuspendingOperation.GetDeferral();
            //TODO: 保存應用程序狀態並停止任何後臺活動
            deferral.Complete();
        }
    }

運行結果：

微軟UWP應用，導航欄設計。