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Como o modelo de objeto de distribuição WCF mapeia para Atom e RSS

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

A SyndicationFeed pode ser serializado em qualquer formato de distribuição para o qual um formatador é definido. WCF vem com dois formatters: Atom10FeedFormatter e Rss20FeedFormatter.

O modelo de objeto ao redor SyndicationFeed e SyndicationItem está alinhado mais estreitamente com a especificação Atom 1.0 do que com a especificação RSS 2.0. Isso ocorre porque o Atom 1.0 é uma especificação mais substancial que define elementos que são ambíguos ou omitidos da especificação RSS 2.0. Devido a isso, muitos itens no modelo de objeto de distribuição WCF não têm representação direta na especificação RSS 2.0. Ao serializar SyndicationFeed e SyndicationItem objetos 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 distribuição.

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 distribuição.

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 é serializado SyndicationFeed 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 XML a seguir mostra como o é serializado SyndicationFeed 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 é serializado SyndicationItem 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 XML a seguir mostra como o é serializado SyndicationItem 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 é serializado SyndicationPerson 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 XML a seguir mostra como a classe é serializada SyndicationPerson para RSS 2.0 se existir apenas uma SyndicationPerson nas Authors coleções 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 é serializada SyndicationPerson para RSS 2.0 se existir mais de uma SyndicationPerson nas Authors coleções or 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 é serializado SyndicationLink para Atom 1.0.

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

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

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

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

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

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

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

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

<content type="xhtml">

<html> some xhtml </html>

</content>

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

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

O XML a seguir mostra como a classe com conteúdo XHTML é serializada UrlSyndicationContent 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 classe é serializada XmlSyndicationContent para 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 classe com conteúdo XHTML é serializada XmlSyndicationContent 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