一步一步学Silverlight ：综合实例之RSS阅读器

实现功能

下面实现数据的获取，采用WebRequest来实现，也可以使用其他方式。

/// <summary>
/// 显示列表
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void displayButton_Click(object sender, RoutedEventArgs e)
{
    Uri uri = new Uri(feedAddress.Text);
    WebRequest request = (WebRequest)WebRequest.Create(uri);
    request.BeginGetResponse(new AsyncCallback(responseReady), request);
}

void responseReady(IAsyncResult asyncResult)
{
    WebRequest request = (WebRequest)asyncResult.AsyncState;
    WebResponse response = (WebResponse)request.EndGetResponse(asyncResult);

    XmlReader reader = XmlReader.Create(response.GetResponseStream());
    SyndicationFeed feed = SyndicationFeed.Load(reader);

    PostsList.ItemsSource = feed.Items;
}

显示详细信息：

/// <summary>
/// 查看详细信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void PostsList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    SyndicationItem item = PostsList.SelectedItem as SyndicationItem;

    Detail.DataContext = item;
}

实现全屏按钮的代码：

/// <summary>
/// 全屏显示
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void fullScreenButton_Click(object sender, RoutedEventArgs e)
{
    Content contentObject = Application.Current.Host.Content;
    contentObject.IsFullScreen = !contentObject.IsFullScreen;
}