WCF 联合对象模型如何映射到 Atom 和 RSS

项目
02/28/2011

开发 Windows Communication Foundation (WCF) 联合服务时，使用以下类创建源和项：

可以按照为其定义格式化程序的任何联合格式序列化 SyndicationFeed。WCF 附带有两个格式化程序：Atom10FeedFormatter 和 Rss20FeedFormatter。

与 RSS 2.0 规范相比，围绕 SyndicationFeed 和 SyndicationItem 的对象模型具有与 Atom 1.0 规范更密切的关系。这是因为 Atom 1.0 是更为充分的规范，它定义了在 RSS 2.0 规范中不明确的或被忽略的元素。因此，WCF 联合对象模型中的许多项在 RSS 2.0 规范中没有直接表示形式。按照 RSS 2.0 序列化 SyndicationFeed 和 SyndicationItem 对象时，使用 WCF 可以将 Atom 特定的数据元素序列化为符合 Atom 规范的命名空间限定扩展元素。可以通过传递到 Rss20FeedFormatter 构造函数的参数对此进行控制。

本主题中的代码示例使用此处定义的两种方法之一进行实际的序列化。

SerializeFeed 序列化联合源。

Public Sub SerializeFeed(ByVal feed As SyndicationFeed)

    Dim atomFormatter As Atom10FeedFormatter = feed.GetAtom10Formatter()
    Dim rssFormatter As Rss20FeedFormatter = feed.GetRss20Formatter()

    Dim atomWriter As XmlWriter = XmlWriter.Create("atom.xml")
    Dim rssWriter As XmlWriter = XmlWriter.Create("rss.xml")
    atomFormatter.WriteTo(atomWriter)
    rssFormatter.WriteTo(rssWriter)
    atomWriter.Close()
    rssWriter.Close()
End Sub

public void SerializeFeed(SyndicationFeed feed)
{
    Atom10FeedFormatter atomFormatter = feed.GetAtom10Formatter();
    Rss20FeedFormatter rssFormatter = feed.GetRss20Formatter();

    XmlWriter atomWriter = XmlWriter.Create("atom.xml");
    XmlWriter rssWriter = XmlWriter.Create("rss.xml");
    atomFormatter.WriteTo(atomWriter);
    rssFormatter.WriteTo(rssWriter);
    atomWriter.Close();
    rssWriter.Close();
}

SerializeItem 序列化联合项。

Public Sub SerializeItem(ByVal item As SyndicationItem)
    Dim atomFormatter As Atom10ItemFormatter = item.GetAtom10Formatter()
    Dim rssFormatter As Rss20ItemFormatter = item.GetRss20Formatter()

    Dim atomWriter As XmlWriter = XmlWriter.Create("atom.xml")
    Dim rssWriter As XmlWriter = XmlWriter.Create("rss.xml")
    atomFormatter.WriteTo(atomWriter)
    rssFormatter.WriteTo(rssWriter)
    atomWriter.Close()
    rssWriter.Close()
End Sub

public void SerializeItem(SyndicationItem item)
{
    Atom10ItemFormatter atomFormatter = item.GetAtom10Formatter();
    Rss20ItemFormatter rssFormatter = item.GetRss20Formatter();

    XmlWriter atomWriter = XmlWriter.Create("atom.xml");
    XmlWriter rssWriter = XmlWriter.Create("rss.xml");
    atomFormatter.WriteTo(atomWriter);
    rssFormatter.WriteTo(rssWriter);
    atomWriter.Close();
    rssWriter.Close();
}

SyndicationFeed

下面的代码示例演示如何按照 Atom 1.0 和 RSS 2.0 序列化 SyndicationFeed 类。

Dim feed As New SyndicationFeed("My Feed Title", "My Feed Description", New Uri("http://MyFeedURI"))
feed.Copyright = New TextSyndicationContent("Copyright 2007")
feed.Language = "EN-US"
feed.LastUpdatedTime = DateTime.Now
feed.Generator = "Sample Code"
feed.Id = "FeedID"
feed.ImageUrl = New Uri("https://server/image.jpg")

Dim category As New SyndicationCategory("MyCategory")
category.Label = "categoryLabel"
category.Name = "categoryName"
category.Scheme = "categoryScheme"
feed.Categories.Add(category)

Dim item As New SyndicationItem("Item Title", "Item Content", New Uri("http://MyItemURI"))
item.Authors.Add(New SyndicationPerson("Jesper.Aaberg@contoso.com", "Jesper Aaberg", "http://Contoso/Aaberg"))
item.Categories.Add(category)
item.Contributors.Add(New SyndicationPerson("Lene.Aaling@contoso.com", "Lene Aaling", "http://Contoso/Aaling"))
item.Copyright = New TextSyndicationContent("Copyright 2007")
item.Id = "ItemID"
item.LastUpdatedTime = DateTime.Now
item.PublishDate = DateTime.Today
item.SourceFeed = feed
item.Summary = New TextSyndicationContent("Item Summary")
Dim items As New Collection(Of SyndicationItem)()
items.Add(item)
feed.Items = items

SerializeFeed(feed)

SyndicationFeed feed = new SyndicationFeed("My Feed Title", "My Feed Description", new Uri("http://MyFeedURI"));
feed.Copyright = new TextSyndicationContent("Copyright 2007");
feed.Language = "EN-US";
feed.LastUpdatedTime = DateTime.Now;
feed.Generator = "Sample Code";
feed.Id = "FeedID";
feed.ImageUrl = new Uri("https://server/image.jpg");

SyndicationCategory category = new SyndicationCategory("MyCategory");
category.Label = "categoryLabel";
category.Name = "categoryName";
category.Scheme = "categoryScheme";
feed.Categories.Add(category);

SyndicationItem item = new SyndicationItem("Item Title", "Item Content", new Uri("http://MyItemURI"));
item.Authors.Add(new SyndicationPerson("Jesper.Aaberg@contoso.com", "Jesper Aaberg", "http://Contoso/Aaberg"));
item.Categories.Add(category);
item.Contributors.Add(new SyndicationPerson("Lene.Aaling@contoso.com", "Lene Aaling", "http://Contoso/Aaling"));
item.Copyright = new TextSyndicationContent("Copyright 2007");
item.Id = "ItemID";
item.LastUpdatedTime = DateTime.Now;
item.PublishDate = DateTime.Today;
item.SourceFeed = feed;
item.Summary = new TextSyndicationContent("Item Summary");

Collection<SyndicationItem> items = new Collection<SyndicationItem>();
items.Add(item);
feed.Items = items;

SerializeFeed(feed);

下面的 XML 演示如何按照 Atom 1.0 序列化 SyndicationFeed。

<?xml version="1.0" encoding="utf-8"?>
<feed xml:lang="EN-US" xmlns="http://www.w3.org/2005/Atom">
  <title type="text">My Feed Title</title>
  <subtitle type="text">My Feed Description</subtitle>
  <id>FeedID</id>
  <rights type="text">Copyright 2007</rights>
  <updated>2007-08-29T13:57:17-07:00</updated>
  <category term="categoryName" label="categoryLabel" scheme="categoryScheme" />
  <logo>https://server/image.jpg</logo>
  <generator>Sample Code</generator>
  <link rel="alternate" href="http://myfeeduri/" />
  <entry>
    <id>ItemID</id>
    <title type="text">Item Title</title>
    <summary type="text">Item Summary</summary>
    <published>2007-08-29T00:00:00-07:00</published>
    <updated>2007-08-29T13:57:17-07:00</updated>
    <author>
      <name>Jesper Aaberg</name>
      <uri>http://Jesper/Aaberg</uri>
      <email>Jesper@Aaberg.com</email>
    </author>
    <contributor>
      <name>Lene Aaling</name>
      <uri>http://Lene/Aaling</uri>
      <email>Lene@Aaling.com</email>
    </contributor>
    <link rel="alternate" href="http://myitemuri/" />
    <category term="categoryName" label="categoryLabel" scheme="categoryScheme" />
    <content type="text">Item Content</content>
    <rights type="text">Copyright 2007</rights>
    <source>
      <title type="text">My Feed Title</title>
      <subtitle type="text">My Feed Description</subtitle>
      <id>FeedID</id>
      <rights type="text">Copyright 2007</rights>
      <updated>2007-08-29T13:57:17-07:00</updated>
      <category term="categoryName" label="categoryLabel" scheme="categoryScheme" />
      <logo>https://server/image.jpg</logo>
      <generator>Sample Code</generator>
      <link rel="alternate" href="http://myfeeduri/" />
    </source>
  </entry>
</feed>

下面的 XML 演示如何按照 RSS 2.0 序列化 SyndicationFeed。

<?xml version="1.0" encoding="utf-8"?>
<rss xmlns:a10="http://www.w3.org/2005/Atom" version="2.0">
  <channel>
    <title>My Feed Title</title>
    <link>http://myfeeduri/</link>
    <description>My Feed Description</description>
    <language>EN-US</language>
    <copyright>Copyright 2007</copyright>
    <lastBuildDate>Wed, 29 Aug 2007 13:57:17 -0700</lastBuildDate>
    <category domain="categoryScheme">categoryName</category>
    <generator>Sample Code</generator>
    <image>
      <url>https://server/image.jpg</url>
      <title>My Feed Title</title>
      <link>http://myfeeduri/</link>
    </image>
    <a10:id>FeedID</a10:id>
    <item>
      <guid isPermaLink="false">ItemID</guid>
      <link>http://myitemuri/</link>
      <author>Jesper@Aaberg.com</author>
      <category domain="categoryScheme">categoryName</category>
      <title>Item Title</title>
      <description>Item Summary</description>
      <source>My Feed Title</source>
      <pubDate>Wed, 29 Aug 2007 00:00:00 -0700</pubDate>
      <a10:updated>2007-08-29T13:57:17-07:00</a10:updated>
      <a10:rights type="text">Copyright 2007</a10:rights>
      <a10:content type="text">Item Content</a10:content>
      <a10:contributor>
        <a10:name>Lene Aaling</a10:name>
        <a10:uri>http://Lene/Aaling</a10:uri>
        <a10:email>Lene@Aaling.com</a10:email>
      </a10:contributor>
    </item>
  </channel>
</rss>

SyndicationItem

下面的代码示例演示如何按照 Atom 1.0 和 RSS 2.0 序列化 SyndicationItem 类。

Dim item As New SyndicationItem("Item Title", "Item Content", New Uri("http://MyItemURI"))
item.Authors.Add(New SyndicationPerson("Jesper.Aaberg@contoso.com", "Jesper Aaberg", "http://Contoso/Aaberg"))
item.Authors.Add(New SyndicationPerson("Syed.Abbas@contoso.com", "Syed Abbas", "http://Contoso/Abbas"))

Dim category As New SyndicationCategory("MyCategory")
category.Label = "categoryLabel"
category.Name = "categoryName"
category.Scheme = "categoryScheme"

Dim category2 As New SyndicationCategory("MyCategoryTwo")
category2.Label = "categoryLabel"
category2.Name = "categoryName"
category2.Scheme = "categoryScheme"

item.Categories.Add(category)
item.Categories.Add(category2)
item.Contributors.Add(New SyndicationPerson("Lene.Aaling@contoso.com", "Lene Aaling", "http://Contoso/Aaling"))
item.Contributors.Add(New SyndicationPerson("Kim.Abercrombie@contoso.com", "Kim Abercrombie", "http://Contoso/Abercrombie"))
item.Copyright = New TextSyndicationContent("Copyright 2007")
item.Id = "ItemID"
item.LastUpdatedTime = DateTime.Now
item.PublishDate = DateTime.Today
item.SourceFeed = feed
item.Summary = New TextSyndicationContent("Item Summary")
Dim items As New Collection(Of SyndicationItem)()
items.Add(item)
feed.Items = items

SerializeItem(item)

SyndicationItem item = new SyndicationItem("Item Title", "Item Content", new Uri("http://MyItemURI"));
item.Authors.Add(new SyndicationPerson("Jesper.Aaberg@contoso.com", "Jesper Aaberg", "http://Contoso/Aaberg"));
item.Authors.Add(new SyndicationPerson("Syed.Abbas@contoso.com", "Syed Abbas", "http://Contoso/Abbas"));

SyndicationCategory category = new SyndicationCategory("MyCategory");
category.Label = "categoryLabel";
category.Name = "categoryName";
category.Scheme = "categoryScheme";

SyndicationCategory category2 = new SyndicationCategory("MyCategoryTwo");
category2.Label = "categoryLabel";
category2.Name = "categoryName";
category2.Scheme = "categoryScheme";

item.Categories.Add(category);
item.Categories.Add(category2);
item.Contributors.Add(new SyndicationPerson("Lene.Aaling@contoso.com", "Lene Aaling", "http://Contoso/Aaling"));
item.Contributors.Add(new SyndicationPerson("Kim.Abercrombie@contoso.com", "Kim Abercrombie", "http://Contoso/Abercrombie"));
item.Copyright = new TextSyndicationContent("Copyright 2007");
item.Id = "ItemID";
item.LastUpdatedTime = DateTime.Now;
item.PublishDate = DateTime.Today;
item.SourceFeed = feed;
item.Summary = new TextSyndicationContent("Item Summary");

Collection<SyndicationItem> items = new Collection<SyndicationItem>();
items.Add(item);
feed.Items = items;

SerializeItem(item);

下面的 XML 演示如何按照 Atom 1.0 序列化 SyndicationItem。

<entry xmlns="http://www.w3.org/2005/Atom">
  <id>ItemID</id>
  <title type="text">Item Title</title>
  <summary type="text">Item Summary</summary>
  <published>2007-08-29T00:00:00-07:00</published>
  <updated>2007-08-29T14:07:09-07:00</updated>
  <author>
    <name>Jesper Aaberg</name>
    <uri>http://Contoso/Aaberg</uri>
    <email>Jesper.Aaberg@contoso.com</email>
  </author>
  <author>
    <name>Syed Abbas</name>
    <uri>http://Contoso/Abbas</uri>
    <email>Syed.Abbas@contoso.com</email>
  </author>
  <contributor>
    <name>Lene Aaling</name>
    <uri>http://Contoso/Aaling</uri>
    <email>Lene.Aaling@contoso.com</email>
  </contributor>
  <contributor>
    <name>Kim Abercrombie</name>
    <uri>http://Contoso/Abercrombie</uri>
    <email>Kim.Abercrombie@contoso.com</email>
  </contributor>
  <link rel="alternate" href="http://myitemuri/" />
  <category term="categoryName" label="categoryLabel" scheme="categoryScheme" />
  <category term="categoryName" label="categoryLabel" scheme="categoryScheme" />
  <content type="text">Item Content</content>
  <rights type="text">Copyright 2007</rights>
  <source>
    <title type="text">My Feed Title</title>
    <subtitle type="text">My Feed Description</subtitle>
    <link rel="alternate" href="http://myfeeduri/" />
  </source>
</entry>

下面的 XML 演示如何按照 RSS 2.0 序列化 SyndicationItem。

<item>
  <guid isPermaLink="false">ItemID</guid>
  <link>http://myitemuri/</link>
  <author xmlns="http://www.w3.org/2005/Atom">
    <name>Jesper Aaberg</name>
    <uri>http://Jesper/Aaberg</uri>
    <email>Jesper@Aaberg.com</email>
  </author>
  <author xmlns="http://www.w3.org/2005/Atom">
    <name>Syed Abbas</name>
    <uri>http://Contoso/Abbas</uri>
    <email>Syed.Abbas@contoso.com</email>
  </author>
  <category domain="categoryScheme">categoryName</category>
  <category domain="categoryScheme">categoryName</category>
  <title>Item Title</title>
  <description>Item Summary</description>
  <source>My Feed Title</source>
  <pubDate>Wed, 29 Aug 2007 00:00:00 -0700</pubDate>
  <updated xmlns="http://www.w3.org/2005/Atom">2007-08-29T14:07:09-07:00</updated>
  <rights type="text" xmlns="http://www.w3.org/2005/Atom">Copyright 2007</rights>
  <content type="text" xmlns="http://www.w3.org/2005/Atom">Item Content</content>
  <contributor xmlns="http://www.w3.org/2005/Atom">
    <name>Lene Aaling</name>
    <uri>http://Contoso/Aaling</uri>
    <email>Lene.Aaling@contoso.com</email>
  </contributor>
  <contributor xmlns="http://www.w3.org/2005/Atom">
    <name>Kim Abercrombie</name>
    <uri>http://Contoso/Abercrombie</uri>
    <email>Kim.Abercrombie@contoso.com</email>
  </contributor>
</item>

SyndicationPerson

下面的代码示例演示如何按照 Atom 1.0 和 RSS 2.0 序列化 SyndicationPerson 类。

Dim feed As New SyndicationFeed("My Feed Title", "My Feed Description", New Uri("http://MyFeedURI"))
feed.Authors.Add(New SyndicationPerson("Jesper.Aaberg@contoso.com", "Jesper Aaberg", "http://Contoso/Aaberg"))
feed.Authors.Add(New SyndicationPerson("Syed.Abbas@contoso.com", "Syed Abbas", "http://Contoso/Abbas"))

feed.Contributors.Add(New SyndicationPerson("Lene.Aaling@contoso.com", "Lene Aaling", "http://Contoso/Aaling"))
feed.Contributors.Add(New SyndicationPerson("Kim.Abercrombie@contoso.com", "Kim Abercrombie", "http://Contoso/Abercrombie"))

SerializeFeed(feed)

SyndicationFeed feed = new SyndicationFeed("My Feed Title", "My Feed Description", new Uri("http://MyFeedURI"));
feed.Authors.Add(new SyndicationPerson("Jesper.Aaberg@contoso.com", "Jesper Aaberg", "http://Contoso/Aaberg"));
feed.Authors.Add(new SyndicationPerson("Syed.Abbas@contoso.com", "Syed Abbas", "http://Contoso/Abbas"));

feed.Contributors.Add(new SyndicationPerson("Lene.Aaling@contoso.com", "Lene Aaling", "http://Contoso/Aaling"));
feed.Contributors.Add(new SyndicationPerson("Kim.Abercrombie@contoso.com", "Kim Abercrombie", "http://Contoso/Abercrombie"));

SerializeFeed(feed);

下面的 XML 演示如何按照 Atom 1.0 序列化 SyndicationPerson。

  <author>
    <name>Jesper Aaberg</name>
    <uri>http://Contoso/Aaberg</uri>
    <email>Jesper.Aaberg@contoso.com</email>
  </author>
<contributor>
    <name>Lene Aaling</name>
    <uri>http://Contoso/Aaling</uri>
    <email>Lene.Aaling@contoso.com</email>
  </contributor>

下面的 XML 演示在 Authors 或 Contributors 集合中分别仅存在一个 SyndicationPerson 时，如何按照 RSS 2.0 序列化 SyndicationPerson 类。

<author>Jesper.Aaberg@contoso.com</author>
<a10:contributor>
    <a10:name>Lene Aaling</a10:name>
    <a10:uri>http://Contoso/Aaling</a10:uri>
    <a10:email>Lene.Aaling@contoso.com</a10:email>
</a10:contributor>

下面的 XML 演示在 Authors 或 Contributors 集合中分别存在多个 SyndicationPerson 时，如何按照 RSS 2.0 序列化 SyndicationPerson 类。

<a10:author>
    <a10:name>Jesper Aaberg</a10:name>
    <a10:uri>http://Contoso/Aaberg</a10:uri>
    <a10:email>Jesper.Aaberg@contoso.com</a10:email>
</a10:author>
<a10:author>
    <a10:name>Syed Abbas</a10:name>
    <a10:uri>http://Contoso/Abbas</a10:uri>
    <a10:email>Syed.Abbas@contoso.com</a10:email>
</a10:author>
<a10:contributor>
    <a10:name>Lene Aaling</a10:name>
    <a10:uri>http://Contoso/Aaling</a10:uri>
    <a10:email>Lene.Aaling@contoso.com</a10:email>
</a10:contributor>
<a10:contributor>
    <a10:name>Kim Abercrombie</a10:name>
    <a10:uri>http://Contoso/Abercrombie</a10:uri>
    <a10:email>Kim.Abercrombie@contoso.com</a10:email>
</a10:contributor>

SyndicationLink

下面的代码示例演示如何按照 Atom 1.0 和 RSS 2.0 序列化 SyndicationLink 类。

Dim feed As New SyndicationFeed("My Feed Title", "My Feed Description", New Uri("http://MyFeedURI"))
feed.Links.Add(New SyndicationLink(New Uri("http://contoso/MyLink"), "alternate", "My Link Title", "text/html", 2048))

SerializeFeed(feed)

SyndicationFeed feed = new SyndicationFeed("My Feed Title", "My Feed Description", new Uri("http://MyFeedURI"));
feed.Links.Add(new SyndicationLink(new Uri("http://contoso/MyLink"), "alternate", "My Link Title", "text/html", 2048));

SerializeFeed(feed);

下面的 XML 演示如何按照 Atom 1.0 序列化 SyndicationLink。

<link rel="alternate" type="text/html" title="My Link Title" length="2048" href="http://contoso/MyLink" />

下面的 XML 演示如何按照 RSS 2.0 序列化 SyndicationLink。

<a10:link rel="alternate" type="text/html" title="My Link Title" length="2048" href="http://contoso/MyLink" />

SyndicationCategory

下面的代码示例演示如何按照 Atom 1.0 和 RSS 2.0 序列化 SyndicationCategory 类。

Dim feed As New SyndicationFeed("My Feed Title", "My Feed Description", New Uri("http://MyFeedURI"))

Dim category As New SyndicationCategory("MyCategory")
category.Label = "categoryLabel"
category.Name = "categoryName"
category.Scheme = "categoryScheme"
feed.Categories.Add(category)

SerializeFeed(feed)

SyndicationFeed feed = new SyndicationFeed("My Feed Title", "My Feed Description", new Uri("http://MyFeedURI"));

SyndicationCategory category = new SyndicationCategory("MyCategory");
category.Label = "categoryLabel";
category.Name = "categoryName";
category.Scheme = "categoryScheme";
feed.Categories.Add(category);

SerializeFeed(feed);

下面的 XML 演示如何按照 Atom 1.0 序列化 SyndicationCategory。

<category term="categoryName" label="categoryLabel" scheme="categoryScheme" />

下面的 XML 演示如何按照 RSS 2.0 序列化 SyndicationCategory。

<category domain="categoryScheme">categoryName</category>

TextSyndicationContent

下面的代码示例演示使用 HTML 内容创建 TextSyndicationContent 时，如何按照 Atom 1.0 和 RSS 2.0 序列化 TextSyndicationContent 类。

Dim htmlItem As New SyndicationItem()
htmlItem.Content = New TextSyndicationContent("<html> some html </html>", TextSyndicationContentKind.Html)

SerializeItem(htmlItem)

SyndicationItem htmlItem = new SyndicationItem();
htmlItem.Content = new TextSyndicationContent("<html> some html </html>", TextSyndicationContentKind.Html);

SerializeItem(htmlItem);

下面的 XML 演示如何按照 Atom 1.0 序列化具有 HTML 内容的 TextSyndicationContent 类。

<content type="html"><html> some html </html></content>

下面的 XML 演示如何按照 RSS 2.0 序列化具有 HTML 内容的 TextSyndicationContent 类。

<description><html> some html </html></description>

下面的代码示例演示使用纯文本内容创建 TextSyndicationContent 时，如何按照 Atom 1.0 和 RSS 2.0 序列化 TextSyndicationContent 类。

Dim txtItem As New SyndicationItem()
txtItem.Content = New TextSyndicationContent("Some Plain Text", TextSyndicationContentKind.Plaintext)

SerializeItem(txtItem)

SyndicationItem txtItem = new SyndicationItem();
txtItem.Content = new TextSyndicationContent("Some Plain Text", TextSyndicationContentKind.Plaintext);

SerializeItem(txtItem);

下面的 XML 演示如何按照 Atom 1.0 序列化具有纯文本内容的 TextSyndicationContent 类。

<content type="text">Some Plain Text</content>

下面的 XML 演示如何按照 RSS 2.0 序列化具有纯文本内容的 TextSyndicationContent 类。

<description>Some Plain Text</description>

下面的代码示例演示使用 XHTML 内容创建 TextSyndicationContent 时，如何按照 Atom 1.0 和 RSS 2.0 序列化 TextSyndicationContent 类。

Dim xhtmlItem As New SyndicationItem()
xhtmlItem.Content = New TextSyndicationContent("<html> some xhtml </html>", TextSyndicationContentKind.XHtml)

SerializeItem(xhtmlItem)

SyndicationItem xhtmlItem = new SyndicationItem();
xhtmlItem.Content = new TextSyndicationContent("<html> some xhtml </html>", TextSyndicationContentKind.XHtml);

SerializeItem(xhtmlItem);

下面的 XML 演示如何按照 Atom 1.0 序列化具有 XHTML 内容的 TextSyndicationContent 类。

<content type="xhtml">

<html> some xhtml </html>

</content>

下面的 XML 演示如何按照 RSS 2.0 序列化具有 XHTML 内容的 TextSyndicationContent 类。

<description><html> some xhtml </html></description>

UrlSyndicationContent

下面的代码示例演示如何按照 Atom 1.0 和 RSS 2.0 序列化 UrlSyndicationContent 类。

Dim urlItem As New SyndicationItem()
urlItem.Content = New UrlSyndicationContent(New Uri("http://Contoso/someUrl"), "audio")

SerializeItem(urlItem)

SyndicationItem urlItem = new SyndicationItem();
urlItem.Content = new UrlSyndicationContent(new Uri("http://Contoso/someUrl"), "audio");

SerializeItem(urlItem);

下面的 XML 演示如何按照 Atom 1.0 序列化 UrlSyndicationContent 类。

<content type="audio" src="http://someurl/" />

下面的 XML 演示如何按照 RSS 2.0 序列化具有 XHTML 内容的 UrlSyndicationContent 类。

<description />

<content type="audio" src="http://Contoso/someurl/" xmlns="http://www.w3.org/2005/Atom" />

XmlSyndicationContent

下面的代码示例演示如何按照 Atom 1.0 和 RSS 2.0 序列化 XmlSyndicationContent 类。

Dim xmlItem As New SyndicationItem()

xmlItem.Title = New TextSyndicationContent("Xml Item Title")
xmlItem.Content = New XmlSyndicationContent("mytype", New SyndicationElementExtension(New SomeData()))

SerializeItem(xmlItem)

SyndicationItem xmlItem = new SyndicationItem();

xmlItem.Title = new TextSyndicationContent("Xml Item Title");
xmlItem.Content = new XmlSyndicationContent("mytype", new SyndicationElementExtension(new SomeData()));

SerializeItem(xmlItem);

下面的 XML 演示如何按照 Atom 1.0 序列化 XmlSyndicationContent 类。

<content type="mytype">

<SomeData xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/FeedMapping" />

</content>

下面的 XML 演示如何按照 RSS 2.0 序列化具有 XHTML 内容的 XmlSyndicationContent 类。

<content type="mytype" xmlns="http://www.w3.org/2005/Atom">

<SomeData xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/FeedMapping" />

</content>

另请参见

任务

如何：创建基本 RSS 源
 如何：创建基本 Atom 源
 如何：作为 Atom 和 RSS 公开源

概念

WCF 联合概述
 联合体系结构

通过

WCF 联合对象模型如何映射到 Atom 和 RSS

SyndicationFeed

SyndicationItem

SyndicationPerson

SyndicationLink

SyndicationCategory

TextSyndicationContent

UrlSyndicationContent

XmlSyndicationContent

另请参见

任务

概念

其他资源