SyndicationItem.ElementExtensions 屬性

定義

命名空間:

System.ServiceModel.Syndication

組件:

System.ServiceModel.Syndication.dll

組件:

System.ServiceModel.dll, System.ServiceModel.Syndication.dll

組件:

System.ServiceModel.Web.dll

組件:

System.ServiceModel.dll

組件:

System.ServiceModel.dll, System.ServiceModel.Web.dll

取得新聞訂閱項目中所包含的項目延伸。

public:
 property System::ServiceModel::Syndication::SyndicationElementExtensionCollection ^ ElementExtensions { System::ServiceModel::Syndication::SyndicationElementExtensionCollection ^ get(); };

public System.ServiceModel.Syndication.SyndicationElementExtensionCollection ElementExtensions { get; }

member this.ElementExtensions : System.ServiceModel.Syndication.SyndicationElementExtensionCollection

Public ReadOnly Property ElementExtensions As SyndicationElementExtensionCollection

屬性值

SyndicationElementExtensionCollection

包含項目延伸的 SyndicationElementExtensionCollection。

範例

下列程式碼會示範如何將項目延伸加入至 SyndicationItem 執行個體。

SyndicationItem item = new SyndicationItem();

// Add several different types of element extensions
item.ElementExtensions.Add("simpleString", "", "hello, world!");
item.ElementExtensions.Add("simpleString", "", "another simple string");

// DataContractExtension is a user-defined type marked with the DataContractAttribute
item.ElementExtensions.Add(new DataContractExtension() { Key = "X", Value = 4 });

// XmlSerializerExtension is a user-defined type that defines a ToString() method
item.ElementExtensions.Add(new XmlSerializerExtension() { Key = "Y", Value = 8 }, new XmlSerializer(typeof(XmlSerializerExtension)));

item.ElementExtensions.Add(new XElement("xElementExtension", new XElement("Key", new XAttribute("attr1", "someValue"), "Z"),
    new XElement("Value", new XAttribute("attr1", "someValue"), "15")).CreateReader());

Dim item As New SyndicationItem()

' Add several different types of element extensions
item.ElementExtensions.Add("simpleString", "", "hello, world!")
item.ElementExtensions.Add("simpleString", "", "another simple string")

' DataContractExtension is a user-defined type marked with the DataContractAttribute
item.ElementExtensions.Add(New DataContractExtension With {.Key = "X", .Value = 4})

' XmlSerializerExtension is a user-defined type that defines a ToString() method
item.ElementExtensions.Add(New XmlSerializerExtension With {.Key = "Y", .Value = 8}, New XmlSerializer(GetType(XmlSerializerExtension)))

item.ElementExtensions.Add(New XElement("xElementExtension", New XElement("Key", New XAttribute("attr1", "someValue"), "Z"), _
        New XElement("Value", New XAttribute("attr1", "someValue"), "15")).CreateReader())

備註

項目延伸是指 Atom 1.0 或 RSS 2.0 規格中未指定的有效 XML 項目。 假設命名空間與封入命名空間不同，即可將任何有效的 XML 項目延伸加以新增。 序列化時，延伸會如其他任何 XML 項目一般寫入。

<mg:MyElement xmlns:mg="http://myserver/elements" />  

如需示範如何新增專案延伸的完整範例，請參閱 鬆散類型延伸模組 範例。