C# 4 and .NET 4

eading syndication feeds sample ❘ 1389
figure 47-2
To use the Syndication API, the assembly System.ServiceModel is referenced with the application. The
OnGetFeed() event handler method is set to the Click event of the button showing the Get Feed text.
The code needed to read the application is really simple. First, the XML content from the RSS feed is read
into the XmlReader class from the System.Xml namespace. Rss20FeedFormatter accepts an XmlReader
with the ReadFrom() method. For data binding, the Feed property that returns a SyndicationFeed is
assigned to the DataContext of the Window, and the Feed.Items property that returns
IEnumerable is assigned to the DataContext of a DockPanel container:
private void OnGetFeed(object sender, RoutedEventArgs e)
{
try
{
using (var reader = XmlReader.Create(textUrl.Text))
{
var formatter = new Rss20FeedFormatter();
formatter.ReadFrom(reader);
this.DataContext = formatter.Feed;
this.feedContent.DataContext = formatter.Feed.Items;
}
}
catch (WebException ex)
{
MessageBox.Show(ex.Message, “Syndication Reader“);
}
}
code snippet SyndicationReader/SyndicationReader.xaml.cs
The XAML code that defines the user interface is shown next. The Title property of the Window class is
bound to the Title.Text property of the SyndicationFeed to display the title of the feed.
In the XAML code, a DockPanel named heading, which contains a Label bound to Title.Text and a
Label bound to Description.Text, is defined. Because these labels are contained within the DockPanel
named feedContent, and feedContent is bound to the Feed.Items property, these labels give title and
description information about the current selected item.
A list of items is displayed in a ListBox that uses an ItemTemplate to bind a label to the Title.
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