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Como o modelo de objeto de sindicalização do WCF mapeia para Atom e RSS

Ao desenvolver um serviço de syndicação do WCF (Windows Communication Foundation), você cria feeds e itens usando as seguintes classes:

SyndicationFeed pode ser serializada em qualquer formato de sindicalização para o qual um formatador esteja definido. O WCF é fornecido com dois formatadores: Atom10FeedFormatter e Rss20FeedFormatter.

O modelo de objeto ao redor SyndicationFeed e SyndicationItem é alinhado mais de perto com a especificação Atom 1.0 do que a especificação RSS 2.0. Isso ocorre porque o Atom 1.0 é uma especificação mais substancial que define elementos ambíguos ou omitidos da especificação RSS 2.0. Por isso, muitos itens no modelo de objeto de sindicalização do WCF não têm representação direta na especificação RSS 2.0. Ao serializar objetos SyndicationFeed e SyndicationItem no RSS 2.0, o WCF permite serializar elementos de dados específicos do Atom como elementos de extensão qualificados por namespace que estão em conformidade com a especificação Atom. Você pode controlar isso com um parâmetro passado para o Rss20FeedFormatter construtor.

Os exemplos de código neste tópico usam um dos dois métodos definidos aqui para fazer a serialização real.

SerializeFeed serializa um feed de sindicalização.

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();
}

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

SerializeItem serializa um item de sindicalização.

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();
}

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

SyndicationFeed

O exemplo de código a seguir mostra como serializar a SyndicationFeed classe para Atom 1.0 e RSS 2.0.

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("http://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);

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("http://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)

O XML a seguir mostra como o SyndicationFeed é serializado para Atom 1.0.

<?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>http://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>http://server/image.jpg</logo>  
      <generator>Sample Code</generator>  
      <link rel="alternate" href="http://myfeeduri/" />  
    </source>  
  </entry>  
</feed>

O seguinte XML mostra como o SyndicationFeed é serializado para RSS 2.0.

<?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>http://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

O exemplo de código a seguir mostra como serializar a SyndicationItem classe para Atom 1.0 e RSS 2.0.

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);

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)

O XML a seguir mostra como o SyndicationItem é serializado para Atom 1.0.

<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>

O seguinte XML mostra como o SyndicationItem é serializado para RSS 2.0.

<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

O exemplo de código a seguir mostra como serializar a SyndicationPerson classe para Atom 1.0 e RSS 2.0.

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);

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)

O XML a seguir mostra como o SyndicationPerson é serializado para Atom 1.0.

  <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>

O seguinte XML mostra como a classe SyndicationPerson é serializada para RSS 2.0 se houver apenas um SyndicationPerson nas coleções Authors ou Contributors, respectivamente.

<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>

O XML a seguir mostra como a classe SyndicationPerson é serializada para RSS 2.0 se houver mais de um SyndicationPerson nas coleções Authors ou Contributors, respectivamente.

<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>

O exemplo de código a seguir mostra como serializar a SyndicationLink classe para Atom 1.0 e RSS 2.0.

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);

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)

O XML a seguir mostra como o SyndicationLink é serializado para Atom 1.0.

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

O seguinte XML mostra como o SyndicationLink é serializado para RSS 2.0.

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

SyndicationCategory

O exemplo de código a seguir mostra como serializar a SyndicationCategory classe para Atom 1.0 e RSS 2.0.

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);

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)

O XML a seguir mostra como o SyndicationCategory é serializado para Atom 1.0.

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

O seguinte XML mostra como o SyndicationCategory é serializado para RSS 2.0.

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

TextSyndicationContent

O exemplo de código a seguir mostra como serializar a TextSyndicationContent classe para Atom 1.0 e RSS 2.0 quando TextSyndicationContent é criado com conteúdo HTML.

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

SerializeItem(htmlItem);

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

SerializeItem(htmlItem)

O XML a seguir mostra como a TextSyndicationContent classe com conteúdo HTML é serializada para o Atom 1.0.

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

O XML a seguir mostra como a TextSyndicationContent classe com conteúdo HTML é serializada para RSS 2.0.

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

O exemplo de código a seguir mostra como serializar a TextSyndicationContent classe para Atom 1.0 e RSS 2.0 quando TextSyndicationContent é criado com conteúdo de texto sem formatação.

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

SerializeItem(txtItem);

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

SerializeItem(txtItem)

O XML a seguir mostra como a TextSyndicationContent classe com conteúdo de texto sem formatação é serializada para o Atom 1.0.

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

O XML a seguir mostra como a TextSyndicationContent classe com conteúdo de texto sem formatação é serializada para RSS 2.0.

<description>Some Plain Text</description>

O exemplo de código a seguir mostra como serializar a TextSyndicationContent classe para Atom 1.0 e RSS 2.0 quando TextSyndicationContent é criado com conteúdo XHTML.

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

SerializeItem(xhtmlItem);

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

SerializeItem(xhtmlItem)

O XML a seguir mostra como a TextSyndicationContent classe com conteúdo XHTML é serializada para Atom 1.0.

<content type="xhtml">

<html> some xhtml </html>

</content>

O XML a seguir mostra como a TextSyndicationContent classe com conteúdo XHTML é serializada para RSS 2.0.

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

UrlSyndicationContent

O exemplo de código a seguir mostra como serializar a UrlSyndicationContent classe para Atom 1.0 e RSS 2.0.

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

SerializeItem(urlItem);

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

SerializeItem(urlItem)

O XML a seguir mostra como a UrlSyndicationContent classe é serializada para o Atom 1.0.

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

O XML a seguir mostra como a UrlSyndicationContent classe com conteúdo XHTML é serializada para RSS 2.0.

<description />

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

XmlSyndicationContent

O exemplo de código a seguir mostra como serializar a XmlSyndicationContent classe para Atom 1.0 e RSS 2.0.

SyndicationItem xmlItem = new SyndicationItem();

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

SerializeItem(xmlItem);

Dim xmlItem As New SyndicationItem()

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

SerializeItem(xmlItem)

O XML a seguir mostra como a XmlSyndicationContent classe é serializada para o Atom 1.0.

<content type="mytype">

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

</content>

O XML a seguir mostra como a XmlSyndicationContent classe com conteúdo XHTML é serializada para RSS 2.0.

<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>

Consulte também