Pou's IT Life

protected override void OnLaunched(LaunchActivatedEventArgs args)

{

    // Create a Frame to act navigation context and navigate to the first page

    var rootFrame = new Frame();

    rootFrame.Navigate(typeof(BlankPage));

    // Place the frame in the current Window and ensure that it is active

    Window.Current.Content = rootFrame;

    Window.Current.Activate();

}

protected override void OnLaunched(LaunchActivatedEventArgs e)

{

    // 建立畫面最底層的 Frame，該 Frame 可自行實作 INavigate來改變；

    Frame rootFrame = Window.Current.Content as Frame;

    if (rootFrame == null)

    {

        rootFrame = new Frame();

        // ... other initialization ...

        Window.Current.Content = rootFrame;

    }

    if (rootFrame.Content == null)

    {

        if (!rootFrame.Navigate(typeof(MainPage), e.Arguments))

        {

            throw new Exception("Failed to create initial page");

        }

    }

    // 啟動該 Window

    Window.Current.Activate();

}

private void btnGo_Click(object sender, RoutedEventArgs e)

{

    Frame.Navigate(typeof(BlankPage2), txtUser.Text);

}

protected override void OnNavigatedTo(NavigationEventArgs e)

{

   if (e.Parameter != null)

   {

       MessageDialog dialog = new MessageDialog("BasicPage2", 

                              string.Format("value = {0}, it's from Page1", e.Parameter));               

       dialog.ShowAsync();

   }

}

public BlankPage2()

{

    this.InitializeComponent();

    Windows.Phone.UI.Input.HardwareButtons.BackPressed += HardwareButtons_BackPressed;

}

void HardwareButtons_BackPressed(object sender, Windows.Phone.UI.Input.BackPressedEventArgs e)

{

    // 註冊 Back 鍵來處理 Frame 中內容 Stack 的切換；

    if (Frame.CanGoBack)

    {

        e.Handled = true;

        frameSub.GoBack();

    }

}

<Page>

    <Grid>

        <Grid.RowDefinitions>

            <RowDefinition Height="20*" />

            <RowDefinition Height="80*" />

        </Grid.RowDefinitions>

        <StackPanel Grid.Row="0" Margin="10">

        </StackPanel>

        <!-- 在 Page 中加入一個 Frame -->

        <Frame Grid.Row="1" x:Name="frameSub" Background="Blue">            

        </Frame>

    </Grid>

</Page>

private void btnGoPage3_Click(object sender, RoutedEventArgs e)

{

    // 指定 Page 中的 Frame 導向不同的畫面；

    frameSub.Navigate(typeof(SubPage.Page3), "From Page2");

}

private void btnGoPage4_Click(object sender, RoutedEventArgs e)

{

    // 指定 Page 中的 Frame 導向不同的畫面；

    frameSub.Navigate(typeof(SubPage.Page4), "From Page2");

}

<!-- 書藉清單用的 ListBox -->

<Grid Grid.Row="1" x:Name="ContentRoot" Margin="19,9.5,19,0">

    <StackPanel>

        <Image Source="{Binding ImgUrl}" Width="100" Height="100" />

        <TextBlock Margin="0,20" Text="{Binding Description}"

                   FontSize="18" TextWrapping="Wrap" />

    </StackPanel>

</Grid>

public CategoryPage()

{

    this.InitializeComponent();

    this.navigationHelper = new NavigationHelper(this);

    this.navigationHelper.LoadState += this.NavigationHelper_LoadState;

    this.navigationHelper.SaveState += this.NavigationHelper_SaveState;

    // 加上讓這一個 Page 使用 NavigationCacheMode.Enabled；

    // 代表如果 Frame 在可限制的 CacheSize 下均可以 Cache 該 Page；

    this.NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Enabled;

    // 載入書藉資料

    LoadBookList();

}

private void LoadBookList()

{

    List<Book> bookList = new List<Book>();

    for (int i = 0; i < 40; i++)

    {

        // 自訂義 Book 類別來儲存書藉資料；

        bookList.Add(new Book

        {

            BookName = String.Format("WP Book {0}", i),

            ImgUrl = new Uri("http://0rz.tw/F3hmz"),

            Description = "Following in the footsteps of Charles Petzold's excellent Programming Windows Sixth Edition" +

                          ", O'Reilly is now offering Windows Phone 8 Development Internals ..."

        });

    }

    lstBooks.ItemsSource = bookList;

}

private void lstBooks_SelectionChanged(object sender, SelectionChangedEventArgs e)

{

    if (lstBooks != null && lstBooks.SelectedIndex != -1)

    {

        // 根據選擇的項目，導向 BookPage.xaml 顯示明細

        Book param = lstBooks.SelectedItem as Book;

        Frame.Navigate(typeof(BookPage), param);

    }

}

<!-- 定義要顯示書本的內容 -->

<Grid Grid.Row="1" x:Name="ContentRoot" Margin="19,9.5,19,0">

    <StackPanel>

        <Image Source="{Binding ImgUrl}" Width="100" Height="100" />

        <TextBlock Margin="0,20" Text="{Binding Description}"

                   FontSize="18" TextWrapping="Wrap" />

    </StackPanel>

</Grid>

protected override void OnNavigatedTo(NavigationEventArgs e)

{

    this.navigationHelper.OnNavigatedTo(e);

    // 根據由 CategoryPage.xaml 所輸入的 Book 來顯示；

    if (e.Parameter != null)

    {

        Book book = e.Parameter as Book;

        this.DataContext = book;

    }

}

if (rootFrame.Content == null)

{

    // Removes the turnstile navigation for startup.

    if (rootFrame.ContentTransitions != null)

    {

        this.transitions = new TransitionCollection();

        foreach (var c in rootFrame.ContentTransitions)

        {

            this.transitions.Add(c);

        }

    }

    rootFrame.ContentTransitions = null;

    rootFrame.Navigated += this.RootFrame_FirstNavigated;

    // 設定 rootFrame 支援的 CacheSize = 1；

    rootFrame.CacheSize = 1;

    // When the navigation stack isn't restored navigate to the first page,

    // configuring the new page by passing required information as a navigation

    // parameter

    if (!rootFrame.Navigate(typeof(CategoryPage), e.Arguments))

    {

        throw new Exception("Failed to create initial page");

    }

}