Edytuj

Udostępnij za pośrednictwem

XElement.Attribute(XName) Method

  • Reference

Definition

Namespace:
System.Xml.Linq
Assembly:
System.Xml.XDocument.dll
Assembly:
System.Xml.Linq.dll
Assembly:
netstandard.dll
Source:
XElement.cs
Source:
XElement.cs
Source:
XElement.cs

Returns the XAttribute of this XElement that has the specified XName.

public:
 System::Xml::Linq::XAttribute ^ Attribute(System::Xml::Linq::XName ^ name);
public System.Xml.Linq.XAttribute Attribute (System.Xml.Linq.XName name);
public System.Xml.Linq.XAttribute? Attribute (System.Xml.Linq.XName name);
member this.Attribute : System.Xml.Linq.XName -> System.Xml.Linq.XAttribute
Public Function Attribute (name As XName) As XAttribute

Parameters

name
XName

The XName of the XAttribute to get.

Returns

XAttribute

An XAttribute that has the specified XName; null if there is no attribute with the specified name.

Examples

The following example creates an element with an attribute. It then retrieves the attribute using this method.

XElement xmlTree = new XElement("Root",
    new XAttribute("Att", "attribute content")
);
XAttribute att = xmlTree.Attribute("Att");
Console.WriteLine(att);

Dim xmlTree As XElement = <Root Att="attribute content"/>

Dim att As XAttribute = xmlTree.Attribute("Att")
Console.WriteLine(att)

This example produces the following output:

Att="attribute content"

The following is the same example, but in this case the XML is in a namespace. For more information, see Work with XML Namespaces.

XNamespace aw = "http://www.adventure-works.com";
XElement xmlTree = new XElement(aw + "Root",
    new XAttribute(XNamespace.Xmlns + "aw", "http://www.adventure-works.com"),
    new XAttribute(aw + "Att", "attribute content")
);
XAttribute att = xmlTree.Attribute(aw + "Att");
Console.WriteLine(att);

Imports <xmlns:aw="http://www.adventure-works.com">

Module Module1
    Sub Main()
        Dim xmlTree As XElement = <aw:Root aw:Att="attribute content"/>

        Dim att As XAttribute = xmlTree.Attribute(GetXmlNamespace(aw) + "Att")
        Console.WriteLine(att)
    End Sub
End Module

This example produces the following output:

aw:Att="attribute content"

Remarks

Some axis methods return collections of elements or attributes. This method returns only a single attribute. Sometimes this is referred to as a singleton (in contrast to a collection).

Visual Basic users can use the integrated attribute axis to retrieve the value of an attribute with a specified name.

Applies to

See also