WordPress的RSS Feed地址是什么？如何添加？如何订阅

WordPress 包含了多种类型的Feed地址，它们都可以通过bloginfo()来调用

如果你想为你的网站添加一个RSS订阅地址，可以使用类似下面的代码（一般是添加到主题的 header.php 、sidebar.php 或 footer.php）：

http://www.wpdaxue.com/wordpress-rss-feed.html

如何为 Windows Phone 8 创建基本的 RSS 阅读器

适用于：Windows Phone 8 和 Windows Phone Silverlight 8.1 | Windows Phone OS 7.1

您可以通过完成以下步骤创建基本 RSS 阅读器。此处展示的指南和代码示例基于名为 RSS 阅读器示例的代码示例。

本主题包括以下部分。

创建 Windows Phone 应用项目

向整合 DLL 中添加引用

创建 RSS 文本裁边器

更新 XAML 代码

更新代码隐藏文件

相关主题

创建 Windows Phone 应用项目

在 Visual Studio 中创建新的 Windows?0?2Phone 应用 项目。

向整合 DLL 中添加引用

若要使用 SyndicationFeed 类，您必须首先添加 DLL 引用。

向整合 DLL 中添加引用

在 Visual Studio 的“项目”菜单中，选择“添加引用”，然后选择“浏览”选项卡。

导航到“程序文件 (x86)”目录。

导航到 Microsoft SDKs/Silverlight/v4.0/Libraries/Client/。

选择“System.ServiceModel.Syndication.dll”，然后单击“确定”。

注意：

如果在此步骤中您查看到一个询问您是否希望继续的提示，则单击“是”。

创建 RSS 文本裁边器

RSS 源中的说明文本通常包含您可能不希望在 RSS 阅读器中显示的 HTML、编码字符及其他数据。您可以从说明文本创建一个排除 HTML 及其他不需要数据的类，并将该类设置为 XAML 字段的转换器。

创建 RSS 文本裁边器

在“解决方案资源管理器”中，右键单击项目名称，再单击“添加”，然后单击“新建项”。

在“已安装的模板”窗格中，选择“Visual C#”，然后在中间窗格内选择“类”。

命名文件 RssTextTrimmer.cs，然后单击“添加”。

在解决方案资源管理器中，双击 RssTextTrimmer.cs 文件。

添加以下命名空间：

C#

using System.Windows.Data

using System.Globalization

using System.Text.RegularExpressions

更新类定义，以便它可以实现 IValueConverter 接口：

C#

public class RssTextTrimmer : IValueConverter

在 RssTextTrimmer 类中添加以下代码：

C#

// Clean up text fields from each SyndicationItem.

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

{

if (value == null) return null

int maxLength = 200

int strLength = 0

string fixedString = ""

// Remove HTML tags and newline characters from the text, and decode HTML encoded characters.

// This is a basic method. Additional code would be needed to more thoroughly

// remove certain elements, such as embedded Javascript.

// Remove HTML tags.

fixedString = Regex.Replace(value.ToString(), "<[^>]+>", string.Empty)

// Remove newline characters.

fixedString = fixedString.Replace("\r", "").Replace("\n", "")

// Remove encoded HTML characters.

fixedString = HttpUtility.HtmlDecode(fixedString)

strLength = fixedString.ToString().Length

// Some feed management tools include an image tag in the Description field of an RSS feed,

// so even if the Description field (and thus, the Summary property) is not populated, it could still contain HTML.

// Due to this, after we strip tags from the string, we should return null if there is nothing left in the resulting string.

if (strLength == 0)

{

return null

}

// Truncate the text if it is too long.

else if (strLength >= maxLength)

{

fixedString = fixedString.Substring(0, maxLength)

// Unless we take the next step, the string truncation could occur in the middle of a word.

// Using LastIndexOf we can find the last space character in the string and truncate there.

fixedString = fixedString.Substring(0, fixedString.LastIndexOf(" "))

}

fixedString += "..."

return fixedString

}

// This code sample does not use TwoWay binding, so we do not need to flesh out ConvertBack.

public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

{

throw new NotImplementedException()

}

通过在“解决方案资源管理器”中双击“App.xaml”，然后在 <Application.Resources>标记中添加以下代码将 RssTextTrimmer 类设置为转换器：

XAML

<converter:RssTextTrimmer xmlns:converter="clr-namespace:namespace" x:Key="RssTextTrimmer" />

其中，namespace 是项目的命名空间的名称。例如，在 Windows Phone 8 示例的基本 RSS 阅读器中，namespace 被替换为 sdkBasicRSSReaderWP8CS。

更新 XAML 代码

更新 XAML 代码

在“解决方案资源浏览器”中双击 MainPage.xaml 文件。

将 <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"></Grid>替换为下面的 XAML 代码：

XAML

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="0,0,12,0">

<Button Content="Load Feed" Height="72" HorizontalAlignment="Left" Margin="9,6,0,0" Name="loadFeedButton" VerticalAlignment="Top" Width="273" Click="loadFeedButton_Click" />

<ListBox Name="feedListBox" Height="468" HorizontalAlignment="Left" Margin="20,100,0,0" VerticalAlignment="Top" Width="444" ScrollViewer.VerticalScrollBarVisibility="Auto" SelectionChanged="feedListBox_SelectionChanged">

<ListBox.ItemTemplate>

<DataTemplate>

<StackPanel VerticalAlignment="Top">

<TextBlock TextDecorations="Underline" FontSize="24" Name="feedTitle" TextWrapping="Wrap" Margin="12,0,0,0" HorizontalAlignment="Left" Foreground="{StaticResource PhoneAccentBrush}" Text="{Binding Title.Text, Converter={StaticResource RssTextTrimmer}}" />

<TextBlock Name="feedSummary" TextWrapping="Wrap" Margin="12,0,0,0" Text="{Binding Summary.Text, Converter={StaticResource RssTextTrimmer}}" />

<TextBlock Name="feedPubDate" Foreground="{StaticResource PhoneSubtleBrush}" Margin="12,0,0,10" Text="{Binding PublishDate.DateTime}" />

</StackPanel>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

<Border BorderBrush="{StaticResource PhoneSubtleBrush}" BorderThickness="1" Height="2" HorizontalAlignment="Left" Margin="20,88,0,0" Name="border1" VerticalAlignment="Top" Width="438" />

</Grid>

更新代码隐藏文件

更新代码隐藏文件的步骤

添加以下命名空间：

C#

using System.IO

using System.ServiceModel.Syndication

using System.Xml

using Microsoft.Phone.Tasks

将以下代码添加到 MainPage 类中，放在 MainPage 构造函数后面。

注意：

以下代码中还包括对基本逻辑删除的支持。

C#

// Click handler that runs when the 'Load Feed' or 'Refresh Feed' button is clicked.

private void loadFeedButton_Click(object sender, System.Windows.RoutedEventArgs e)

{

// WebClient is used instead of HttpWebRequest in this code sample because

// the implementation is simpler and easier to use, and we do not need to use

// advanced functionality that HttpWebRequest provides, such as the ability to send headers.

WebClient webClient = new WebClient()

// Subscribe to the DownloadStringCompleted event prior to downloading the RSS feed.

webClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(webClient_DownloadStringCompleted)

// Download the RSS feed. DownloadStringAsync was used instead of OpenStreamAsync because we do not need

// to leave a stream open, and we will not need to worry about closing the channel.

webClient.DownloadStringAsync(new System.Uri("http://windowsteamblog.com/windows_phone/b/windowsphone/rss.aspx"))

}

// Event handler which runs after the feed is fully downloaded.

private void webClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)

{

if (e.Error != null)

{

Deployment.Current.Dispatcher.BeginInvoke(() =>

{

// Showing the exact error message is useful for debugging. In a finalized application,

// output a friendly and applicable string to the user instead.

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)

}

}

// 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 (feedListBox.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)

// In Windows Phone OS 7.1 or later versions, WebClient events are raised on the same type of thread they were called upon.

// For example, if WebClient was run on a background thread, the event would be raised on the background thread.

// While WebClient can raise an event on the UI thread if called from the UI thread, a best practice is to always

// use the Dispatcher to update the UI. This keeps the UI thread free from heavy processing.

Deployment.Current.Dispatcher.BeginInvoke(() =>

{

// Bind the list of SyndicationItems to our ListBox.

feedListBox.ItemsSource = feed.Items

loadFeedButton.Content = "Refresh Feed"

})

}

// The SelectionChanged handler for the feed items

private void feedListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)

{

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()

}

}

}

问题不在wp插件。

pipe确实可以折腾rss，循环fetch page截到网页特定的<html>标记。但觉得很慢，常报错，且过往的文章在pipe里最多抓到10条。最后我弃用了。

除非你这个feed资源是独一份，否则找替代网站是更实惠的方案。

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