そこで、Windows Phone 用の RSS フィード アプリを作成する方法を見つけました。SyndicationFeed アイテムを Listbox テンプレートにバインドします。そして、それはうまくいきます！ただし、少し異なる処理を行うアプリを作成したかったのです。Listbox テンプレートを Pivot に変更するのは非常に簡単だと思いました。問題は、記事の代わりに「System.ServiceModel.Syndication.SyndicationItem」しか得られないことです。
それを修正する方法がわかりません。誰か助けてもらえますか？
Xaml:
mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
d:DataContext="{d:DesignData SampleData/MainViewModelSampleData.xaml}"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True">
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Popup Name="myPopup" IsOpen="True" Width="Auto">
<ProgressBar Height="Auto" IsIndeterminate="True" Width="480" />
</Popup>
<controls:Pivot Name="FeedPivot" Loaded="loadFeed">
<controls:Pivot.Title>
<TextBlock FontSize="56"> Komorkomania </TextBlock>
</controls:Pivot.Title>
<controls:Pivot.HeaderTemplate>
<DataTemplate>
<Grid>
<TextBlock>test1</TextBlock>
</Grid>
</DataTemplate>
</controls:Pivot.HeaderTemplate>
<controls:Pivot.DataContext>
<DataTemplate>
<StackPanel>
<TextBlock>test</TextBlock>
<!--
<TextBlock FontWeight="Bold" FontSize="28" Name="feedTitle" TextWrapping="Wrap" Margin="12,0,0,0" HorizontalAlignment="Left" Foreground="{StaticResource PhoneAccentBrush}" Text="{Binding Title.Text, Converter={StaticResource RssTextTrimmer}}" Width="430" />
<TextBlock Name="feedSummary" FontSize="24" TextWrapping="Wrap" Margin="12,0,0,0" Text="{Binding Summary.Text, Converter={StaticResource RssTextTrimmer}}" Width="430" />
<TextBlock Name="feedPubDate" Foreground="{StaticResource PhoneSubtleBrush}" Margin="12,0,0,10" Text="{Binding PublishDate.DateTime}" Width="430" />
-->
</StackPanel>
</DataTemplate>
</controls:Pivot.DataContext>
</controls:Pivot>
</Grid>
コードビハインド:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using System.IO;
using System.ServiceModel.Syndication;
using System.Xml;
using Microsoft.Phone.Tasks;
using Microsoft.Phone.Shell;
using System.ComponentModel;
using System.Windows.Controls.Primitives;
namespace KomorkomaniaRss
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
public MainPage()
{
InitializeComponent();
myPopup.IsOpen = true;
}
// Co robimy jak już w końcu się ściągnie?
private void webClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error != null)
{
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
MessageBox.Show(e.Error.Message);
});
}
else
{
// Save the feed into the State property in case the application is tombstoned.
this.State["feed"] = e.Result;
UpdateFeedList(e.Result);
myPopup.IsOpen = false;
}
}
// This method determines whether the user has navigated to the application after the application was tombstoned.
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
// First, check whether the feed is already saved in the page state.
if (this.State.ContainsKey("feed"))
{
// Get the feed again only if the application was tombstoned, which means the ListBox will be empty.
// This is because the OnNavigatedTo method is also called when navigating between pages in your application.
// You would want to rebind only if your application was tombstoned and page state has been lost.
if (FeedPivot.Items.Count == 0)
{
UpdateFeedList(State["feed"] as string);
}
}
}
// This method sets up the feed and binds it to our ListBox.
private void UpdateFeedList(string feedXML)
{
// Load the feed into a SyndicationFeed instance.
StringReader stringReader = new StringReader(feedXML);
XmlReader xmlReader = XmlReader.Create(stringReader);
SyndicationFeed feed = SyndicationFeed.Load(xmlReader);
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
// Bind the list of SyndicationItems to our ListBox.
FeedPivot.ItemsSource = feed.Items;
});
}
public void feedLoader()
{
myPopup.IsOpen = true;
WebClient webClient = new WebClient();
webClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(webClient_DownloadStringCompleted);
webClient.DownloadStringAsync(new System.Uri("http://komorkomania.pl/feed/rss2"));
}
private void runBrowser(object sender)
{
ListBox listBox = sender as ListBox;
if (listBox != null && listBox.SelectedItem != null)
{
// Get the SyndicationItem that was tapped.
SyndicationItem sItem = (SyndicationItem)listBox.SelectedItem;
// Set up the page navigation only if a link actually exists in the feed item.
if (sItem.Links.Count > 0)
{
// Get the associated URI of the feed item.
Uri uri = sItem.Links.FirstOrDefault().Uri;
// Create a new WebBrowserTask Launcher to navigate to the feed item.
// An alternative solution would be to use a WebBrowser control, but WebBrowserTask is simpler to use.
WebBrowserTask webBrowserTask = new WebBrowserTask();
webBrowserTask.Uri = uri;
webBrowserTask.Show();
}
}
}
// The SelectionChanged handler for the feed items
private void feedListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
runBrowser(sender);
}
private void loadFeed(object sender, RoutedEventArgs e)
{
feedLoader();
if (!App.ViewModel.IsDataLoaded)
{
App.ViewModel.LoadData();
}
}
}
}
別のアクションを処理するための「残り物」がいくつかあります。それらを無視してください、私はまだそれに到達していません。最大の焦点は、アプリが読み込まれた後にテキストを表示することです。