SyndicationFeed Classe

Definizione

public ref class SyndicationFeed

[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)]
public class SyndicationFeed

public class SyndicationFeed

[<System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)>]
type SyndicationFeed = class

type SyndicationFeed = class

Public Class SyndicationFeed

Ereditarietà

Object

SyndicationFeed

Attributi

DynamicallyAccessedMembersAttribute

Esempio

Il codice seguente illustra come creare un'istanza SyndicationFeed e serializzarla sia in Atom 1.0 che in RSS 2.0.

SyndicationFeed feed = new SyndicationFeed("Feed Title", "Feed Description", new Uri("http://Feed/Alternate/Link"), "FeedID", DateTime.Now);
// Add a custom attribute.
XmlQualifiedName xqName = new XmlQualifiedName("CustomAttribute");
feed.AttributeExtensions.Add(xqName, "Value");

SyndicationPerson sp = new SyndicationPerson("jesper@contoso.com", "Jesper Aaberg", "http://Jesper/Aaberg");
feed.Authors.Add(sp);

SyndicationCategory category = new SyndicationCategory("FeedCategory", "CategoryScheme", "CategoryLabel");
feed.Categories.Add(category);

feed.Contributors.Add(new SyndicationPerson("lene@contoso.com", "Lene Aaling", "http://lene/aaling"));
feed.Copyright = new TextSyndicationContent("Copyright 2007");
feed.Description = new TextSyndicationContent("This is a sample feed");

// Add a custom element.
XmlDocument doc = new XmlDocument();
XmlElement feedElement = doc.CreateElement("CustomElement");
feedElement.InnerText = "Some text";
feed.ElementExtensions.Add(feedElement);

feed.Generator = "Sample Code";
feed.Id = "FeedID";
feed.ImageUrl = new Uri("http://server/image.jpg");

TextSyndicationContent textContent = new TextSyndicationContent("Some text content");
SyndicationItem item = new SyndicationItem("Item Title", textContent, new Uri("http://server/items"), "ItemID", DateTime.Now);

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

feed.Language = "en-us";
feed.LastUpdatedTime = DateTime.Now;

SyndicationLink link = new SyndicationLink(new Uri("http://server/link"), "alternate", "Link Title", "text/html", 1000);
feed.Links.Add(link);

XmlWriter atomWriter = XmlWriter.Create("atom.xml");
Atom10FeedFormatter atomFormatter = new Atom10FeedFormatter(feed);
atomFormatter.WriteTo(atomWriter);
atomWriter.Close();

XmlWriter rssWriter = XmlWriter.Create("rss.xml");
Rss20FeedFormatter rssFormatter = new Rss20FeedFormatter(feed);
rssFormatter.WriteTo(rssWriter);
rssWriter.Close();

Dim feed As SyndicationFeed = New SyndicationFeed("Feed Title", "Feed Description", New Uri("http:'Feed/Alternate/Link"), "FeedID", DateTime.Now)
' Add a custom attribute.
Dim xqName As XmlQualifiedName = New XmlQualifiedName("CustomAttribute")
feed.AttributeExtensions.Add(xqName, "Value")

Dim sp As SyndicationPerson = New SyndicationPerson("jesper@contoso.com", "Jesper Aaberg", "http:'jesper/aaberg")
feed.Authors.Add(sp)

Dim category As SyndicationCategory = New SyndicationCategory("FeedCategory", "CategoryScheme", "CategoryLabel")
feed.Categories.Add(category)

feed.Contributors.Add(New SyndicationPerson("Lene@contoso.com", "Lene Aaling", "http:'Lene/Aaling"))
feed.Copyright = New TextSyndicationContent("Copyright 2007")
feed.Description = New TextSyndicationContent("This is a sample feed")

' Add a custom element.
Dim doc As XmlDocument = New XmlDocument()
Dim feedElement As XmlElement = doc.CreateElement("CustomElement")
feedElement.InnerText = "Some text"
feed.ElementExtensions.Add(feedElement)

feed.Generator = "Sample Code"
feed.Id = "FeedID"
feed.ImageUrl = New Uri("http:'server/image.jpg")

Dim textContent As TextSyndicationContent = New TextSyndicationContent("Some text content")
Dim item As SyndicationItem = New SyndicationItem("Item Title", textContent, New Uri("http:'server/items"), "ItemID", DateTime.Now)

Dim items As Collection(Of SyndicationItem) = New Collection(Of SyndicationItem)()
items.Add(item)
feed.Items = items

feed.Language = "en-us"
feed.LastUpdatedTime = DateTime.Now

Dim link As SyndicationLink = New SyndicationLink(New Uri("http:'server/link"), "alternate", "Link Title", "text/html", 1000)
feed.Links.Add(link)

Dim atomWriter As XmlWriter = XmlWriter.Create("atom.xml")
Dim atomFormatter As Atom10FeedFormatter = New Atom10FeedFormatter(feed)
atomFormatter.WriteTo(atomWriter)
atomWriter.Close()

Dim rssWriter As XmlWriter = XmlWriter.Create("rss.xml")
Dim rssFormatter As Rss20FeedFormatter = New Rss20FeedFormatter(feed)
rssFormatter.WriteTo(rssWriter)
rssWriter.Close()

Il codice XML seguente mostra come un oggetto SyndicationFeed viene serializzato in Atom 1.0.

<feed xml:lang="en-us" CustomAttribute="Value" xmlns="http://www.w3.org/2005/Atom">
  <title type="text">Feed Title</title>
  <subtitle type="text">This is a sample feed</subtitle>
  <id>FeedID</id>

  <rights type="text">Copyright 2007</rights>
  <updated>2007-04-13T17:29:38Z</updated>
  <category term="FeedCategory" label="CategoryLabel" scheme="CategoryScheme" />
  <logo>http://contoso/image.jpg</logo>
  <author>
    <name>Jesper Aaberg</name>
    <uri>http://contoso/Aaberg</uri>
    <email>Jesper.Asberg@contoso.com</email>
  </author>
  <contributor>
    <name>Lene Aalling</name>
    <uri>http://contoso/Aalling</uri>
    <email>Lene.Aaling@contoso.com</email>
  </contributor>
  <generator>Sample Code</generator>
  <link rel="alternate" type="text/html" title="Link Title" length="1000" href="http://contoso/link" />

  <link customAttribute="value" rel="alternate" type="text/html" title="Link Title" length="1000" href="http://contoso/link" />
  <CustomElement xmlns="">Some text</CustomElement>
  <entry>
    <id>ItemID</id>
    <title type="text">Item Title</title>
    <updated>2007-04-13T17:29:38Z</updated>
    <link rel="alternate" href="http://contoso/items" />
    <content type="text">Some text content</content>
  </entry>

</feed>

Nel codice XML seguente viene illustrato come serializzare un'istanza SyndicationFeed in RSS 2.0.

<rss xmlns:a10="http://www.w3.org/2005/Atom" version="2.0">
  <channel CustomAttribute="Value">
    <title>Feed Title</title>
    <link>http://feed/Alternate/Link</link>
    <description>This is a sample feed</description>
    <language>en-us</language>

    <copyright>Copyright 2007</copyright>

    <managingEditor>Jesper.Aaberg@contoso.com</managingEditor>
    <lastBuildDate>Fri, 13 Apr 2007 17:29:38 Z</lastBuildDate>
    <category domain="CategoryScheme">FeedCategory</category>
    <a10:link rel="alternate" type="text/html" title="Link Title" length="1000" href="http://contoso/link" />
    <generator>Sample Code</generator>
    
    <a10:contributor>
      <a10:name>Lene Aalling</a10:name>
      <a10:uri>http://contoso/Aalling</a10:uri>
      <a10:email>Lene.Aalling@contoso.com</a10:email>
    </a10:contributor>
    
    <a10:author>
      <a10:name>Lene Aalling</a10:name>
      <a10:uri>http://contoso/Aalling</a10:uri>
      <a10:email>Lene.Aalling@contoso.com</a10:email>
    </a10:author>
    <image>
      <url>http://contoso/image.jpg</url>
      <title>Feed Title</title>
      <link>http://feed/Alternate/Link</link>
    </image>
    <a10:id>FeedID</a10:id>
    <a10:link customAttribute="value" rel="alternate" type="text/html" title="Link Title" length="1000" href="http://contoso/link" />
    
    <CustomElement>Some text</CustomElement>
    <item>
      <guid isPermaLink="false">ItemID</guid>
      <link>http://contoso/items</link>
      <title>Item Title</title>
      <description>Some text content</description>
      <a10:updated>2007-04-13T17:29:38Z</a10:updated>
    </item>
  </channel>
</rss>

Commenti

Se serializzato in Atom 1.0, un'istanza SyndicationFeed viene scritta in un <feed> elemento . Nella tabella seguente viene illustrato il modo in cui ogni proprietà definita nella SyndicationFeed classe viene serializzata in Atom 1.0.

Se serializzato in RSS 2.0, un'istanza SyndicationFeed viene scritta in un <rss> elemento . Nella tabella seguente viene illustrato il modo in cui ogni proprietà definita nella SyndicationFeed classe viene serializzata in RSS 2.0.