Código completo del lector de blogs (aplicaciones de la Tienda Windows con C#/VB y XAML)

Este tema proporciona la muestra de código completo usada en el tutorial Parte 5: Crear un lector de blogs.

Importante  Este tutorial está diseñado para usarse con Microsoft Visual Studio 2012 y Windows 8. Algunas partes del tutorial no funcionarán correctamente con Microsoft Visual Studio 2013 y Windows 8.1.

Este tema contiene estas secciones:

Ubicación de descarga

Este ejemplo no se puede descargar.

Tecnologías

Lenguajes de programaciónC#, Visual Basic .NET
Modelos de programaciónWindows Runtime

Requisitos

Cliente mínimo compatibleWindows 8
Servidor mínimo compatibleWindows Server 2012
SDK mínimo necesarioMicrosoft Visual Studio Express 2012 para Windows 8

Ver el código (XAML)

App.xaml



<Application
    x:Class="WindowsBlogReader.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:WindowsBlogReader">

    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>

                <!-- 
                    Styles that define common aspects of the platform look and feel
                    Required by Visual Studio project and item templates
                 -->
                <ResourceDictionary Source="Common/StandardStyles.xaml"/>
            </ResourceDictionary.MergedDictionaries>
            
            <local:FeedDataSource x:Key="feedDataSource"/>
            <local:DateConverter x:Key="dateConverter"/>

            <SolidColorBrush x:Key="WindowsBlogBackgroundBrush" Color="#FF0A2562"/>
            <Style x:Key="WindowsBlogLayoutRootStyle" 
                           TargetType="Panel" 
                           BasedOn="{StaticResource LayoutRootStyle}">
                <Setter Property="Background" 
                                Value="{StaticResource WindowsBlogBackgroundBrush}"/>
            </Style>

            <ControlTemplate x:Key="DateBlockTemplate">
                <Canvas Height="86" Width="86"  Margin="8,8,0,8" 
                        HorizontalAlignment="Left" VerticalAlignment="Top">
                    <TextBlock TextTrimming="WordEllipsis" TextWrapping="NoWrap" 
                                       Width="Auto" Height="Auto" Margin="8,0,4,0" 
                                       FontSize="32" FontWeight="Bold">
                        <TextBlock.Text>
                            <Binding Path="PubDate" Converter="{StaticResource dateConverter}" 
                                     ConverterParameter="month"  />
                        </TextBlock.Text>
                    </TextBlock>

                    <TextBlock TextTrimming="WordEllipsis" TextWrapping="Wrap" 
                                       Width="40" Height="Auto" Margin="8,0,0,0" 
                                       FontSize="34" FontWeight="Bold" Canvas.Top="36">
                        <TextBlock.Text>
                            <Binding Path="PubDate" Converter="{StaticResource dateConverter}" 
                                     ConverterParameter="day"  />
                        </TextBlock.Text>
                    </TextBlock>
                    <Line Stroke="White" StrokeThickness="2" X1="54" Y1="46" X2="54" Y2="80" />

                    <TextBlock TextWrapping="Wrap" 
                               Width="20" Height="Auto" 
                               FontSize="{StaticResource ControlContentThemeFontSize}" 
                               Canvas.Top="42" Canvas.Left="60">
                        <TextBlock.Text>
                            <Binding Path="PubDate" Converter="{StaticResource dateConverter}" 
                                     ConverterParameter="year"  />
                        </TextBlock.Text>
                    </TextBlock>
                </Canvas>
            </ControlTemplate>

            <SolidColorBrush x:Key="ListViewItemSelectedBackgroundThemeBrush" Color="#FF465985"/>
            <SolidColorBrush x:Key="ListViewItemSelectedPointerOverBackgroundThemeBrush" Color="#FF384A72"/>
            <SolidColorBrush x:Key="ListViewItemSelectedPointerOverBorderThemeBrush" Color="#FF384A72" />
            
        </ResourceDictionary>
    </Application.Resources>
</Application>


App.xaml.cs/vb



using System;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

// The Blank Application template is documented at http://go.microsoft.com/fwlink/p/?LinkID=234227

namespace WindowsBlogReader
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    sealed partial class App : Application
    {
        /// <summary>
        /// Initializes the singleton application object.  This is the first line of authored code
        /// executed, and as such is the logical equivalent of main() or WinMain().
        /// </summary>
        public App()
        {
            this.InitializeComponent();
            this.Suspending += OnSuspending;
        }

        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used when the application is launched to open a specific file, to display
        /// search results, and so forth.
        /// </summary>
        /// <param name="args">Details about the launch request and process.</param>
        protected async override void OnLaunched(LaunchActivatedEventArgs args)
        {
            Frame rootFrame = Window.Current.Content as Frame;

            // Do not repeat app initialization when the Window already has content,
            // just ensure that the window is active
            if (rootFrame == null)
            {
                // Create a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame();
                WindowsBlogReader.Common.SuspensionManager.RegisterFrame(rootFrame, "AppFrame");

                var connectionProfile = Windows.Networking.Connectivity.NetworkInformation.GetInternetConnectionProfile();
                if (connectionProfile != null)
                {
                    FeedDataSource feedDataSource = (FeedDataSource)App.Current.Resources["feedDataSource"];
                    if (feedDataSource != null)
                    {
                        if (feedDataSource.Feeds.Count == 0)
                        {
                            await feedDataSource.GetFeedsAsync();
                        }
                    }
                }
                else
                {
                    var messageDialog = new Windows.UI.Popups.MessageDialog("An internet connection is needed to download feeds. Please check your connection and restart the app.");
                    var result = messageDialog.ShowAsync();
                }

                if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    //TODO: Load state from previously suspended application
                    await WindowsBlogReader.Common.SuspensionManager.RestoreAsync();
                }

                // Place the frame in the current Window
                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                // 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(ItemsPage), args.Arguments))
                {
                    throw new Exception("Failed to create initial page");
                }
            }
            // Ensure the current window is active
            Window.Current.Activate();
        }

        /// <summary>
        /// Invoked when application execution is being suspended.  Application state is saved
        /// without knowing whether the application will be terminated or resumed with the contents
        /// of memory still intact.
        /// </summary>
        /// <param name="sender">The source of the suspend request.</param>
        /// <param name="e">Details about the suspend request.</param>
        private async void OnSuspending(object sender, SuspendingEventArgs e)
        {
            var deferral = e.SuspendingOperation.GetDeferral();
            //TODO: Save application state and stop any background activity
            await WindowsBlogReader.Common.SuspensionManager.SaveAsync();
            deferral.Complete();
        }
    }
}


ItemsPage.xaml



<common:LayoutAwarePage
    x:Name="pageRoot"
    x:Class="WindowsBlogReader.ItemsPage"
    DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:WindowsBlogReader"
    xmlns:common="using:WindowsBlogReader.Common"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Page.Resources>

        <!-- Collection of items displayed by this page -->
        <CollectionViewSource
            x:Name="itemsViewSource"
            Source="{Binding Items}"/>

        <!-- TODO: Delete this line if the key AppName is declared in App.xaml -->
        <x:String x:Key="AppName">Windows Team Blogs</x:String>

        <!-- light blue -->
        <SolidColorBrush x:Key="BlockBackgroundBrush" Color="#FF557EB9"/>

        <!-- Grid Styles -->
        <Style x:Key="GridTitleTextStyle" TargetType="TextBlock" 
               BasedOn="{StaticResource BasicTextStyle}">
            <Setter Property="FontSize" Value="26.667"/>
            <Setter Property="Margin" Value="12,0,12,2"/>
        </Style>

        <Style x:Key="GridDescriptionTextStyle" TargetType="TextBlock" 
               BasedOn="{StaticResource BasicTextStyle}">
            <Setter Property="VerticalAlignment" Value="Bottom"/>
            <Setter Property="Margin" Value="12,0,12,60"/>
        </Style>

        <DataTemplate x:Key="DefaultGridItemTemplate">
            <Grid HorizontalAlignment="Left" Width="250" Height="250">
                <Border Background="{StaticResource BlockBackgroundBrush}" />
                <TextBlock Text="{Binding Title}" 
                           Style="{StaticResource GridTitleTextStyle}"/>
                <TextBlock Text="{Binding Description}" 
                           Style="{StaticResource GridDescriptionTextStyle}" />
                <StackPanel VerticalAlignment="Bottom" Orientation="Horizontal"
                        Background="{StaticResource ListViewItemOverlayBackgroundThemeBrush}">
                    <TextBlock Text="Last Updated" Margin="12,4,0,8" Height="42"/>
                    <TextBlock Text="{Binding PubDate, Converter={StaticResource dateConverter}}" 
                               Margin="12,4,12,8" />
                </StackPanel>
            </Grid>
        </DataTemplate>

        <!-- Used in Snapped view -->
        <DataTemplate x:Key="NarrowListItemTemplate">
            <Grid Height="80">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <Border Background="{StaticResource BlockBackgroundBrush}" 
                        Width="80" Height="80" />
                <ContentControl Template="{StaticResource DateBlockTemplate}" 
                                Margin="-12,-12,0,0"/>
                <StackPanel Grid.Column="1" HorizontalAlignment="Left" 
                            Margin="12,8,0,0">
                    <TextBlock Text="{Binding Title}" MaxHeight="56" TextWrapping="Wrap"/>
                </StackPanel>
            </Grid>
        </DataTemplate>
    </Page.Resources>

    <!--
        This grid acts as a root panel for the page that defines two rows:
        * Row 0 contains the back button and page title
        * Row 1 contains the rest of the page layout
    -->
    <Grid Style="{StaticResource WindowsBlogLayoutRootStyle}">
        <Grid.RowDefinitions>
            <RowDefinition Height="140"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!-- Horizontal scrolling grid used in most view states -->
        <GridView
            x:Name="itemGridView"
            AutomationProperties.AutomationId="ItemsGridView"
            AutomationProperties.Name="Items"
            TabIndex="1"
            Grid.RowSpan="2"
            Padding="116,136,116,46"
            ItemsSource="{Binding Source={StaticResource itemsViewSource}}"
            ItemTemplate="{StaticResource DefaultGridItemTemplate}"
            SelectionMode="None"
            IsSwipeEnabled="false" IsItemClickEnabled="True" ItemClick="ItemView_ItemClick"/>

        <!-- Vertical scrolling list only used when snapped -->
        <ListView
            x:Name="itemListView"
            AutomationProperties.AutomationId="ItemsListView"
            AutomationProperties.Name="Items"
            TabIndex="1"
            Grid.Row="1"
            Visibility="Collapsed"
            Margin="0,-10,0,0"
            Padding="10,0,0,60"
            ItemsSource="{Binding Source={StaticResource itemsViewSource}}"
            ItemTemplate="{StaticResource NarrowListItemTemplate}"
            SelectionMode="None"
            IsSwipeEnabled="false" IsItemClickEnabled="True" ItemClick="ItemView_ItemClick"/>

        <!-- Back button and page title -->
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Button x:Name="backButton" Click="GoBack" 
                    IsEnabled="{Binding Frame.CanGoBack, ElementName=pageRoot}" 
                    Style="{StaticResource BackButtonStyle}"/>
            <TextBlock x:Name="pageTitle" Grid.Column="1" Text="{StaticResource AppName}" 
                       IsHitTestVisible="false" 
                       Style="{StaticResource PageHeaderTextStyle}"/>
        </Grid>

        <VisualStateManager.VisualStateGroups>

            <!-- Visual states reflect the application's view state -->
            <VisualStateGroup x:Name="ApplicationViewStates">
                <VisualState x:Name="FullScreenLandscape"/>
                <VisualState x:Name="Filled"/>

                <!-- The entire page respects the narrower 100-pixel margin convention for portrait -->
                <VisualState x:Name="FullScreenPortrait">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" 
                                                       Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" 
                                                    Value="{StaticResource PortraitBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemGridView" 
                                                       Storyboard.TargetProperty="Padding">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="96,136,86,56"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>

                <!--
                    The back button and title have different styles when snapped, 
                    and the list representation is substituted
                    for the grid displayed in all other view states
                -->
                <VisualState x:Name="Snapped">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" 
                                                       Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" 
                                                    Value="{StaticResource SnappedBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" 
                                                       Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" 
                                                    Value="{StaticResource SnappedPageHeaderTextStyle}"/>
                        </ObjectAnimationUsingKeyFrames>

                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemListView"
                                                       Storyboard.TargetProperty="Visibility">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemGridView" 
                                                       Storyboard.TargetProperty="Visibility">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
    </Grid>
</common:LayoutAwarePage>


ItemsPage.xaml.cs/vb


using System;
using System.Collections.Generic;
using Windows.UI.Xaml.Controls;

// The Items Page item template is documented at http://go.microsoft.com/fwlink/p/?LinkID=234233

namespace WindowsBlogReader
{
    /// <summary>
    /// A page that displays a collection of item previews.  In the Split Application this page
    /// is used to display and select one of the available groups.
    /// </summary>
    public sealed partial class ItemsPage : WindowsBlogReader.Common.LayoutAwarePage
    {
        public ItemsPage()
        {
            this.InitializeComponent();
        }

        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="navigationParameter">The parameter value passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
        /// </param>
        /// <param name="pageState">A dictionary of state preserved by this page during an earlier
        /// session.  This will be null the first time a page is visited.</param>
        protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
        {
            // TODO: Assign a bindable collection of items to this.DefaultViewModel["Items"]
            FeedDataSource feedDataSource = (FeedDataSource)App.Current.Resources["feedDataSource"];

            if (feedDataSource != null)
            {
                this.DefaultViewModel["Items"] = feedDataSource.Feeds;
            }
        }

        private void ItemView_ItemClick(object sender, ItemClickEventArgs e)
        {
            // Navigate to the split page, configuring the new page
            // by passing the title of the clicked item as a navigation parameter
            if (e.ClickedItem != null)
            {
                string title = ((FeedData)e.ClickedItem).Title;
                this.Frame.Navigate(typeof(SplitPage), title);
            }
        }
    }
}


SplitPage.xaml



<common:LayoutAwarePage
    x:Name="pageRoot"
    x:Class="WindowsBlogReader.SplitPage"
    DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:WindowsBlogReader"
    xmlns:common="using:WindowsBlogReader.Common"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Page.Resources>
        <Style x:Key="WebViewAppBarButtonStyle" TargetType="Button" 
           BasedOn="{StaticResource AppBarButtonStyle}">
            <Setter Property="AutomationProperties.AutomationId" Value="WebViewAppBarButton"/>
            <Setter Property="AutomationProperties.Name" Value="View Web Page"/>
            <Setter Property="Content" Value="&#xE12B;"/>
        </Style>

        <Storyboard x:Name="PopInStoryboard">
            <PopInThemeAnimation  Storyboard.TargetName="contentViewBorder" 
                              FromHorizontalOffset="400"/>
        </Storyboard>

        <!-- Collection of items displayed by this page -->
        <CollectionViewSource
            x:Name="itemsViewSource"
            Source="{Binding Items}"/>

        <DataTemplate x:Key="DefaultListItemTemplate">
            <Grid Height="110" Margin="6">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <Border Background="#FF6BBD46" Width="110" Height="110">
                    <ContentControl Template="{StaticResource DateBlockTemplate}" />
                </Border>
                <!--<Border Background="{StaticResource ListViewItemPlaceholderBackgroundThemeBrush}" Width="110" Height="110">
                    <Image Source="{Binding Image}" Stretch="UniformToFill" AutomationProperties.Name="{Binding Title}"/>
                </Border>-->
                <StackPanel Grid.Column="1" VerticalAlignment="Top" Margin="10,0,0,0">
                    <TextBlock Text="{Binding Title}" FontSize="26.667" TextWrapping="Wrap"
                               MaxHeight="72" Foreground="#FFFE5815" />
                    <TextBlock Text="{Binding Author}" FontSize="18.667" />
                    <!--<TextBlock Text="{Binding Title}" Style="{StaticResource TitleTextStyle}" TextWrapping="NoWrap"/>
                    <TextBlock Text="{Binding Author}" Style="{StaticResource CaptionTextStyle}" TextWrapping="NoWrap"/>
                    <TextBlock Text="{Binding PubDate}" Style="{StaticResource BodyTextStyle}" MaxHeight="60"/>-->
                </StackPanel>
            </Grid>
        </DataTemplate>
        
        <!-- green -->
        <SolidColorBrush x:Key="BlockBackgroundBrush" Color="#FF6BBD46"/>
        
        <!-- Used in Filled and Snapped views -->
        <DataTemplate x:Key="NarrowListItemTemplate">
            <Grid Height="80">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <Border Background="{StaticResource BlockBackgroundBrush}" 
                        Width="80" Height="80"/>
                <ContentControl Template="{StaticResource DateBlockTemplate}" 
                                Margin="-12,-12,0,0"/>
                <StackPanel Grid.Column="1" HorizontalAlignment="Left" 
                            Margin="12,8,0,0">
                    <TextBlock Text="{Binding Title}" MaxHeight="56" 
                               Foreground="#FFFE5815" TextWrapping="Wrap"/>
                    <TextBlock Text="{Binding Author}" FontSize="12" />
                </StackPanel>
            </Grid>
        </DataTemplate>
    </Page.Resources>

    <Page.TopAppBar>
        <AppBar Padding="10,0,10,0" Background="#F20A2562">
            <Grid>
                <Button Click="ViewDetail_Click" HorizontalAlignment="Right" 
                    Style="{StaticResource WebViewAppBarButtonStyle}"/>
            </Grid>
        </AppBar>
    </Page.TopAppBar>
    <!--
        This grid acts as a root panel for the page that defines two rows:
        * Row 0 contains the back button and page title
        * Row 1 contains the rest of the page layout
    -->
    <Grid Style="{StaticResource WindowsBlogLayoutRootStyle}">
        <Grid.RowDefinitions>
            <RowDefinition Height="140"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition x:Name="primaryColumn" Width="610"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>

        <!-- Back button and page title -->
        <Grid x:Name="titlePanel" Grid.ColumnSpan="2">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Button
                x:Name="backButton"
                Click="GoBack"
                IsEnabled="{Binding DefaultViewModel.CanGoBack, ElementName=pageRoot}"
                Style="{StaticResource BackButtonStyle}"/>
            <TextBlock x:Name="pageTitle" Grid.Column="1" Text="{Binding Feed.Title}" 
                       Style="{StaticResource PageHeaderTextStyle}" />
        </Grid>

        <!-- Vertical scrolling item list -->
        <ListView
            x:Name="itemListView"
            AutomationProperties.AutomationId="ItemsListView"
            AutomationProperties.Name="Items"
            TabIndex="1"
            Grid.Row="1"
            Margin="-10,-10,0,0"
            Padding="120,0,0,60"
            ItemsSource="{Binding Source={StaticResource itemsViewSource}}"
            IsSwipeEnabled="False"
            SelectionChanged="ItemListView_SelectionChanged"
            ItemTemplate="{StaticResource DefaultListItemTemplate}"/>

        <!-- Details for selected item -->
        <ScrollViewer
            x:Name="itemDetail"
            AutomationProperties.AutomationId="ItemDetailScrollViewer"
            Grid.Column="1"
            Grid.Row="1"
            Padding="70,0,120,0"
            DataContext="{Binding SelectedItem, ElementName=itemListView}"
            Style="{StaticResource VerticalScrollViewerStyle}">

            <Grid x:Name="itemDetailGrid">
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="*"/>
                </Grid.RowDefinitions>

                <TextBlock x:Name="itemTitle" Text="{Binding Title}" 
                           Style="{StaticResource SubheaderTextStyle}"/>
                <Border x:Name="contentViewBorder" BorderBrush="Gray" BorderThickness="2" 
                        Grid.Row="1" Margin="0,15,0,20">
                    <Grid>
                        <WebView x:Name="contentView" NavigationFailed="ContentView_NavigationFailed" />
                        <Rectangle x:Name="contentViewRect" />
                    </Grid>
                </Border>
            </Grid>
        </ScrollViewer>

        <VisualStateManager.VisualStateGroups>
            <!-- Visual states reflect the application's view state -->
            <VisualStateGroup x:Name="ApplicationViewStates">
                <VisualState x:Name="FullScreenLandscapeOrWide"/>

                <!-- Filled uses a simpler list format in a narrower column -->
                <VisualState x:Name="FilledOrNarrow">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="primaryColumn" Storyboard.TargetProperty="Width">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="420"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemListView" Storyboard.TargetProperty="ItemTemplate">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource NarrowListItemTemplate}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="Padding">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="60,0,66,0"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>

                <!--
                    The page respects the narrower 100-pixel margin convention for portrait, and the page
                    initially hides details to show only the list of items
                -->
                <VisualState x:Name="FullScreenPortrait">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PortraitBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="Visibility">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemListView" Storyboard.TargetProperty="Padding">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="100,0,90,60"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>

                <!--
                    When an item is selected in portrait the details display requires more extensive changes:
                     * Hide the master list and the column is was in
                     * Move item details down a row to make room for the title
                     * Move the title directly above the details
                     * Adjust margins and padding for details
                 -->
                <VisualState x:Name="FullScreenPortrait_Detail">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PortraitBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="primaryColumn" Storyboard.TargetProperty="Width">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemListView" Storyboard.TargetProperty="Visibility">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="(Grid.Row)">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="(Grid.RowSpan)">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="titlePanel" Storyboard.TargetProperty="(Grid.Column)">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetailGrid" Storyboard.TargetProperty="Margin">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="0,0,0,60"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="Padding">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="100,0,90,0"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>

                <!--
                    The back button and title have different styles when snapped, and the page
                    initially hides details to show only the list of items
                -->
                <VisualState x:Name="Snapped">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedPageHeaderTextStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="primaryColumn" Storyboard.TargetProperty="Width">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="320"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="Visibility">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemListView" Storyboard.TargetProperty="ItemTemplate">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource NarrowListItemTemplate}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemListView" Storyboard.TargetProperty="Padding">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="20,0,0,0"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>

                <!--
                    When snapped and an item is selected the details display requires more extensive changes:
                     * Hide the master list and the column is was in
                     * Move item details down a row to make room for the title
                     * Move the title directly above the details
                     * Adjust margins and padding for details
                     * Use a different font for title and subtitle
                     * Adjust margins below subtitle
                 -->
                <VisualState x:Name="Snapped_Detail">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedPageHeaderTextStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="primaryColumn" Storyboard.TargetProperty="Width">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemListView" Storyboard.TargetProperty="Visibility">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="(Grid.Row)">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="(Grid.RowSpan)">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="titlePanel" Storyboard.TargetProperty="(Grid.Column)">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                        </ObjectAnimationUsingKeyFrames>
                        <!--<ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetailTitlePanel" Storyboard.TargetProperty="(Grid.Row)">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                        </ObjectAnimationUsingKeyFrames>-->
                        <!--<ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetailTitlePanel" Storyboard.TargetProperty="(Grid.Column)">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                        </ObjectAnimationUsingKeyFrames>-->
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetail" Storyboard.TargetProperty="Padding">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="20,0,20,0"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemDetailGrid" Storyboard.TargetProperty="Margin">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="0,0,0,60"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemTitle" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource TitleTextStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemTitle" Storyboard.TargetProperty="Margin">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                        </ObjectAnimationUsingKeyFrames>
                        <!--<ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemSubtitle" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource CaptionTextStyle}"/>
                        </ObjectAnimationUsingKeyFrames>-->
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
    </Grid>
</common:LayoutAwarePage>

SplitPage.xaml.cs/vb


using System;
using System.Collections.Generic;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;

// The Split Page item template is documented at http://go.microsoft.com/fwlink/p/?LinkID=234234

namespace WindowsBlogReader
{
    /// <summary>
    /// A page that displays a group title, a list of items within the group, and details for
    /// the currently selected item.
    /// </summary>
    public sealed partial class SplitPage : WindowsBlogReader.Common.LayoutAwarePage
    {
        public SplitPage()
        {
            this.InitializeComponent();
        }

        private void ViewDetail_Click(object sender, RoutedEventArgs e)
        {
            FeedItem selectedItem = this.itemListView.SelectedItem as FeedItem;
            if (selectedItem != null && this.Frame != null)
            {
                string itemTitle = selectedItem.Title;
                this.Frame.Navigate(typeof(DetailPage), itemTitle);
            }
        }

        #region Page state management

        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="navigationParameter">The parameter value passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
        /// </param>
        /// <param name="pageState">A dictionary of state preserved by this page during an earlier
        /// session.  This will be null the first time a page is visited.</param>
        protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
        {
            // Run the PopInThemeAnimation 
            Windows.UI.Xaml.Media.Animation.Storyboard sb =
                this.FindName("PopInStoryboard") as Windows.UI.Xaml.Media.Animation.Storyboard;
            if (sb != null) sb.Begin();

            // TODO: Assign a bindable group to this.DefaultViewModel["Group"]
            // TODO: Assign a collection of bindable items to this.DefaultViewModel["Items"]
            string feedTitle = (string)navigationParameter;
            FeedData feedData = FeedDataSource.GetFeed(feedTitle);
            if (feedData != null)
            {
                this.DefaultViewModel["Feed"] = feedData;
                this.DefaultViewModel["Items"] = feedData.Items;
            }

            if (pageState == null)
            {
                // When this is a new page, select the first item automatically unless logical page
                // navigation is being used (see the logical page navigation #region below.)
                if (!this.UsingLogicalPageNavigation() && this.itemsViewSource.View != null)
                {
                    this.itemsViewSource.View.MoveCurrentToFirst();
                }
                else
                {
                    this.itemsViewSource.View.MoveCurrentToPosition(-1);
                }
            }
            else
            {
                // Restore the previously saved state associated with this page
                if (pageState.ContainsKey("SelectedItem") && this.itemsViewSource.View != null)
                {
                    // TODO: Invoke this.itemsViewSource.View.MoveCurrentTo() with the selected
                    //       item as specified by the value of pageState["SelectedItem"]
                    string itemTitle = (string)pageState["SelectedItem"];
                    FeedItem selectedItem = FeedDataSource.GetItem(itemTitle);
                    this.itemsViewSource.View.MoveCurrentTo(selectedItem);
                }
            }
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="pageState">An empty dictionary to be populated with serializable state.</param>
        protected override void SaveState(Dictionary<String, Object> pageState)
        {
            if (this.itemsViewSource.View != null)
            {
                var selectedItem = this.itemsViewSource.View.CurrentItem;
                // TODO: Derive a serializable navigation parameter and assign it to
                //       pageState["SelectedItem"]
                if (selectedItem != null)
                {
                    string itemTitle = ((FeedItem)selectedItem).Title;
                    pageState["SelectedItem"] = itemTitle;
                }
            }
        }

        #endregion

        #region Logical page navigation

        // Visual state management typically reflects the four application view states directly
        // (full screen landscape and portrait plus snapped and filled views.)  The split page is
        // designed so that the snapped and portrait view states each have two distinct sub-states:
        // either the item list or the details are displayed, but not both at the same time.
        //
        // This is all implemented with a single physical page that can represent two logical
        // pages.  The code below achieves this goal without making the user aware of the
        // distinction.

        /// <summary>
        /// Invoked to determine whether the page should act as one logical page or two.
        /// </summary>
        /// <param name="viewState">The view state for which the question is being posed, or null
        /// for the current view state.  This parameter is optional with null as the default
        /// value.</param>
        /// <returns>True when the view state in question is portrait or snapped, false
        /// otherwise.</returns>
        private bool UsingLogicalPageNavigation(ApplicationViewState? viewState = null)
        {
            if (viewState == null) viewState = ApplicationView.Value;
            return viewState == ApplicationViewState.FullScreenPortrait ||
                viewState == ApplicationViewState.Snapped;
        }

        /// <summary>
        /// Invoked when an item within the list is selected.
        /// </summary>
        /// <param name="sender">The GridView (or ListView when the application is Snapped)
        /// displaying the selected item.</param>
        /// <param name="e">Event data that describes how the selection was changed.</param>
        void ItemListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            // Invalidate the view state when logical page navigation is in effect, as a change
            // in selection may cause a corresponding change in the current logical page.  When
            // an item is selected this has the effect of changing from displaying the item list
            // to showing the selected item's details.  When the selection is cleared this has the
            // opposite effect.
            if (this.UsingLogicalPageNavigation()) this.InvalidateVisualState();

            // Add this code to populate the web view
            //  with the content of the selected blog post.
            Selector list = sender as Selector;
            FeedItem selectedItem = list.SelectedItem as FeedItem;
            if (selectedItem != null)
            {
                this.contentView.NavigateToString(selectedItem.Content);
            }
            else
            {
                this.contentView.NavigateToString("");
            }      
        }

        /// <summary>
        /// Invoked when the page's back button is pressed.
        /// </summary>
        /// <param name="sender">The back button instance.</param>
        /// <param name="e">Event data that describes how the back button was clicked.</param>
        protected override void GoBack(object sender, RoutedEventArgs e)
        {
            if (this.UsingLogicalPageNavigation() && itemListView.SelectedItem != null)
            {
                // When logical page navigation is in effect and there's a selected item that
                // item's details are currently displayed.  Clearing the selection will return to
                // the item list.  From the user's point of view this is a logical backward
                // navigation.
                this.itemListView.SelectedItem = null;
            }
            else
            {
                // When logical page navigation is not in effect, or when there is no selected
                // item, use the default back button behavior.
                base.GoBack(sender, e);
            }
        }

        /// <summary>
        /// Invoked to determine the name of the visual state that corresponds to an application
        /// view state.
        /// </summary>
        /// <param name="viewState">The view state for which the question is being posed.</param>
        /// <returns>The name of the desired visual state.  This is the same as the name of the
        /// view state except when there is a selected item in portrait and snapped views where
        /// this additional logical page is represented by adding a suffix of _Detail.</returns>
        protected override string DetermineVisualState(ApplicationViewState viewState)
        {
            // Update the back button's enabled state when the view state changes
            var logicalPageBack = this.UsingLogicalPageNavigation(viewState) && this.itemListView.SelectedItem != null;
            var physicalPageBack = this.Frame != null && this.Frame.CanGoBack;
            this.DefaultViewModel["CanGoBack"] = logicalPageBack || physicalPageBack;

            // Determine visual states for landscape layouts based not on the view state, but
            // on the width of the window.  This page has one layout that is appropriate for
            // 1366 virtual pixels or wider, and another for narrower displays or when a snapped
            // application reduces the horizontal space available to less than 1366.
            if (viewState == ApplicationViewState.Filled ||
                viewState == ApplicationViewState.FullScreenLandscape)
            {
                var windowWidth = Window.Current.Bounds.Width;
                if (windowWidth >= 1366) return "FullScreenLandscapeOrWide";
                return "FilledOrNarrow";
            }

            // When in portrait or snapped start with the default visual state name, then add a
            // suffix when viewing details instead of the list
            var defaultStateName = base.DetermineVisualState(viewState);
            return logicalPageBack ? defaultStateName + "_Detail" : defaultStateName;
        }

        #endregion

        private void ContentView_NavigationFailed(object sender, WebViewNavigationFailedEventArgs e)
        {
            string errorString = "<p>Page could not be loaded.</p><p>Error is: " + e.WebErrorStatus.ToString() + "</p>";
            this.contentView.NavigateToString(errorString);
        }
    }
}


DetailPage.xaml



<common:LayoutAwarePage
    x:Name="pageRoot"
    x:Class="WindowsBlogReader.DetailPage"
    DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:WindowsBlogReader"
    xmlns:common="using:WindowsBlogReader.Common"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Page.Resources>

        <!-- TODO: Delete this line if the key AppName is declared in App.xaml -->
        <x:String x:Key="AppName">My Application</x:String>

        <Storyboard x:Name="PopInStoryboard">
            <PopInThemeAnimation  Storyboard.TargetName="contentViewBorder" 
                              FromHorizontalOffset="400"/>
        </Storyboard>
    </Page.Resources>

    <!--
        This grid acts as a root panel for the page that defines two rows:
        * Row 0 contains the back button and page title
        * Row 1 contains the rest of the page layout
    -->
    <Grid Style="{StaticResource WindowsBlogLayoutRootStyle}">
        <Grid.RowDefinitions>
            <RowDefinition Height="140"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!-- Back button and page title -->
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Button x:Name="backButton" Click="GoBack" 
                    IsEnabled="{Binding Frame.CanGoBack, ElementName=pageRoot}" 
                    Style="{StaticResource BackButtonStyle}"/>
            <TextBlock x:Name="pageTitle" Grid.Column="1" Text="{Binding Title}" 
                       Style="{StaticResource PageHeaderTextStyle}"/>
        </Grid>


        <Border x:Name="contentViewBorder" BorderBrush="Gray" BorderThickness="2" 
                Grid.Row="1" Margin="120,15,20,20">
            <WebView x:Name="contentView" 
                     NavigationFailed="contentView_NavigationFailed"/>
        </Border>
        
        <VisualStateManager.VisualStateGroups>

            <!-- Visual states reflect the application's view state -->
            <VisualStateGroup x:Name="ApplicationViewStates">
                <VisualState x:Name="FullScreenLandscape"/>
                <VisualState x:Name="Filled"/>

                <!-- The entire page respects the narrower 100-pixel margin convention for portrait -->
                <VisualState x:Name="FullScreenPortrait">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" 
                                                       Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" 
                                                    Value="{StaticResource PortraitBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>

                <!-- The back button and title have different styles when snapped -->
                <VisualState x:Name="Snapped">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" 
                                                       Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" 
                                                    Value="{StaticResource SnappedBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" 
                                                       Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" 
                                                    Value="{StaticResource SnappedPageHeaderTextStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="contentViewBorder" 
                                                       Storyboard.TargetProperty="Margin">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="20,5,20,20"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
    </Grid>
</common:LayoutAwarePage>


DetailPage.xaml.cs/vb


using System;
using System.Collections.Generic;
using Windows.UI.Xaml.Controls;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/p/?LinkID=234237

namespace WindowsBlogReader
{
    /// <summary>
    /// A basic page that provides characteristics common to most applications.
    /// </summary>
    public sealed partial class DetailPage : WindowsBlogReader.Common.LayoutAwarePage
    {
        public DetailPage()
        {
            this.InitializeComponent();
        }

        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="navigationParameter">The parameter value passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
        /// </param>
        /// <param name="pageState">A dictionary of state preserved by this page during an earlier
        /// session.  This will be null the first time a page is visited.</param>
        protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
        {
            // Run the PopInThemeAnimation 
            Windows.UI.Xaml.Media.Animation.Storyboard sb =
                this.FindName("PopInStoryboard") as Windows.UI.Xaml.Media.Animation.Storyboard;
            if (sb != null) sb.Begin();

            // Add this code to navigate the web view to the selected blog post.
            string itemTitle = (string)navigationParameter;
            FeedItem feedItem = FeedDataSource.GetItem(itemTitle);
            if (feedItem != null)
            {
                this.contentView.Navigate(feedItem.Link);
                this.DataContext = feedItem;
            }
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="pageState">An empty dictionary to be populated with serializable state.</param>
        protected override void SaveState(Dictionary<String, Object> pageState)
        {
        }

        private void contentView_NavigationFailed(object sender, WebViewNavigationFailedEventArgs e)
        {
            string errorString = "<p>Page could not be loaded.</p><p>Error is: " + e.WebErrorStatus.ToString() + "</p>";
            this.contentView.NavigateToString(errorString);
        }
    }
}


FeedData.cs/vb


using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading.Tasks;
using Windows.Web.Syndication;

namespace WindowsBlogReader
{
    // FeedData
    // Holds info for a single blog feed, including a list of blog posts (FeedItem).
    public class FeedData
    {
        public string Title { get; set; }
        public string Description { get; set; }
        public DateTime PubDate { get; set; }

        private List<FeedItem> _Items = new List<FeedItem>();
        public List<FeedItem> Items
        {
            get
            {
                return this._Items;
            }
        }
    }

    // FeedItem
    // Holds info for a single blog post.
    public class FeedItem
    {
        public string Title { get; set; }
        public string Author { get; set; }
        public string Content { get; set; }
        public DateTime PubDate { get; set; }
        public Uri Link { get; set; }
    }

    // FeedDataSource
    // Holds a collection of blog feeds (FeedData), and contains methods needed to
    // retreive the feeds.
    public class FeedDataSource
    {
        private ObservableCollection<FeedData> _Feeds = new ObservableCollection<FeedData>();
        public ObservableCollection<FeedData> Feeds
        {
            get
            {
                return this._Feeds;
            }
        }

        public async Task GetFeedsAsync()
        {
            Task<FeedData> feed1 =
                GetFeedAsync("http://windowsteamblog.com/windows/b/developers/atom.aspx");
            Task<FeedData> feed2 =
                GetFeedAsync("http://windowsteamblog.com/windows/b/windowsexperience/atom.aspx");
            Task<FeedData> feed3 =
                GetFeedAsync("http://windowsteamblog.com/windows/b/extremewindows/atom.aspx");
            Task<FeedData> feed4 =
                GetFeedAsync("http://windowsteamblog.com/windows/b/business/atom.aspx");
            Task<FeedData> feed5 =
                GetFeedAsync("http://windowsteamblog.com/windows/b/bloggingwindows/atom.aspx");
            Task<FeedData> feed6 =
                GetFeedAsync("http://windowsteamblog.com/windows/b/windowssecurity/atom.aspx");
            Task<FeedData> feed7 =
                GetFeedAsync("http://windowsteamblog.com/windows/b/springboard/atom.aspx");
            Task<FeedData> feed8 =
                GetFeedAsync("http://windowsteamblog.com/windows/b/windowshomeserver/atom.aspx");
            // There is no Atom feed for this blog, so use the RSS feed.
            Task<FeedData> feed9 =
                GetFeedAsync("http://windowsteamblog.com/windows_live/b/windowslive/rss.aspx");
            Task<FeedData> feed10 =
                GetFeedAsync("http://windowsteamblog.com/windows_live/b/developer/atom.aspx");
            Task<FeedData> feed11 =
                GetFeedAsync("http://windowsteamblog.com/ie/b/ie/atom.aspx");
            Task<FeedData> feed12 =
                GetFeedAsync("http://windowsteamblog.com/windows_phone/b/wpdev/atom.aspx");
            Task<FeedData> feed13 =
                GetFeedAsync("http://windowsteamblog.com/windows_phone/b/wmdev/atom.aspx");
            Task<FeedData> feed14 =
                GetFeedAsync("http://windowsteamblog.com/windows_phone/b/windowsphone/atom.aspx");

            this.Feeds.Add(await feed1);
            this.Feeds.Add(await feed2);
            this.Feeds.Add(await feed3);
            this.Feeds.Add(await feed4);
            this.Feeds.Add(await feed5);
            this.Feeds.Add(await feed6);
            this.Feeds.Add(await feed7);
            this.Feeds.Add(await feed8);
            this.Feeds.Add(await feed9);
            this.Feeds.Add(await feed10);
            this.Feeds.Add(await feed11);
            this.Feeds.Add(await feed12);
            this.Feeds.Add(await feed13);
            this.Feeds.Add(await feed14);
        }

        private async Task<FeedData> GetFeedAsync(string feedUriString)
        {
            Windows.Web.Syndication.SyndicationClient client = new SyndicationClient();
            Uri feedUri = new Uri(feedUriString);

            try
            {
                SyndicationFeed feed = await client.RetrieveFeedAsync(feedUri);

                // This code is executed after RetrieveFeedAsync returns the SyndicationFeed.
                // Process the feed and copy the data you want into the FeedData and FeedItem classes.
                FeedData feedData = new FeedData();

                if (feed.Title != null && feed.Title.Text != null)
                {
                    feedData.Title = feed.Title.Text;
                }
                if (feed.Subtitle != null && feed.Subtitle.Text != null)
                {
                    feedData.Description = feed.Subtitle.Text;
                }
                if (feed.Items != null && feed.Items.Count > 0)
                {
                    // Use the date of the latest post as the last updated date.
                    feedData.PubDate = feed.Items[0].PublishedDate.DateTime;

                    foreach (SyndicationItem item in feed.Items)
                    {
                        FeedItem feedItem = new FeedItem();
                        if (item.Title != null && item.Title.Text != null)
                        {
                            feedItem.Title = item.Title.Text;
                        }
                        if (item.PublishedDate != null)
                        {
                            feedItem.PubDate = item.PublishedDate.DateTime;
                        }
                        if (item.Authors != null && item.Authors.Count > 0)
                        {
                            feedItem.Author = item.Authors[0].Name.ToString();
                        }
                        // Handle the differences between RSS and Atom feeds.
                        if (feed.SourceFormat == SyndicationFormat.Atom10)
                        {
                            if (item.Content != null && item.Content.Text != null)
                            {
                                feedItem.Content = item.Content.Text;
                            }
                            if (item.Id != null)
                            {
                                feedItem.Link = new Uri("http://windowsteamblog.com" + item.Id);
                            }
                        }
                        else if (feed.SourceFormat == SyndicationFormat.Rss20)
                        {
                            if (item.Summary != null && item.Summary.Text != null)
                            {
                                feedItem.Content = item.Summary.Text;
                            }
                            if (item.Links != null && item.Links.Count > 0)
                            {
                                feedItem.Link = item.Links[0].Uri;
                            }
                        }
                        feedData.Items.Add(feedItem);
                    }    
                }
                return feedData;
            }
            catch (Exception)
            {
                return null;
            }
        }

        // Returns the feed that has the specified title.
        public static FeedData GetFeed(string title)
        {
            // Simple linear search is acceptable for small data sets
            var _feedDataSource = App.Current.Resources["feedDataSource"] as FeedDataSource;

            var matches = _feedDataSource.Feeds.Where((feed) => feed.Title.Equals(title));
            if (matches.Count() == 1) return matches.First();
            return null;
        }

        // Returns the post that has the specified title.
        public static FeedItem GetItem(string uniqueId)
        {
            // Simple linear search is acceptable for small data sets
            var _feedDataSource = App.Current.Resources["feedDataSource"] as FeedDataSource;
            var _feeds = _feedDataSource.Feeds;

            var matches = _feedDataSource.Feeds.SelectMany(group => group.Items).Where((item) => item.Title.Equals(uniqueId));
            if (matches.Count() == 1) return matches.First();
            return null;
        }
    }
}


DateConverter.cs/vb



using System;
using Windows.Globalization.DateTimeFormatting;

namespace WindowsBlogReader
{
    public class DateConverter : Windows.UI.Xaml.Data.IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, string culture)
        {
            if (value == null)
                throw new ArgumentNullException("value", "Value cannot be null.");

            if (!typeof(DateTime).Equals(value.GetType()))
                throw new ArgumentException("Value must be of type DateTime.", "value");

            DateTime dt = (DateTime)value;

            if (parameter == null)
            {
                // Date "7/27/2011 9:30:59 AM" returns "7/27/2011"
                return DateTimeFormatter.ShortDate.Format(dt);
            }
            else if ((string)parameter == "day")
            {
                // Date "7/27/2011 9:30:59 AM" returns "27"
                DateTimeFormatter dateFormatter = new DateTimeFormatter("{day.integer(2)}");
                return dateFormatter.Format(dt);
            }
            else if ((string)parameter == "month")
            {
                // Date "7/27/2011 9:30:59 AM" returns "JUL"
                DateTimeFormatter dateFormatter = new DateTimeFormatter("{month.abbreviated(3)}");
                return dateFormatter.Format(dt).ToUpper();
            }
            else if ((string)parameter == "year")
            {
                // Date "7/27/2011 9:30:59 AM" returns "2011"
                DateTimeFormatter dateFormatter = new DateTimeFormatter("{year.full}");
                return dateFormatter.Format(dt);
            }
            else
            {
                // Requested format is unknown. Return in the original format.
                return dt.ToString();
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, string culture)
        {
            string strValue = value as string;
            DateTime resultDateTime;
            if (DateTime.TryParse(strValue, out resultDateTime))
            {
                return resultDateTime;
            }
            return Windows.UI.Xaml.DependencyProperty.UnsetValue;
        }
    }
}


 

 

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