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Extensions.Attributes Method (IEnumerable<XElement>)

Returns a collection of the attributes of every element in the source collection.

Namespace:  System.Xml.Linq
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)

public static IEnumerable<XAttribute> Attributes(
	this IEnumerable<XElement> source
)

Parameters

source
Type: System.Collections.Generic.IEnumerable<XElement>
An IEnumerable<T> of XElement that contains the source collection.

Return Value

Type: System.Collections.Generic.IEnumerable<XAttribute>
An IEnumerable<T> of XAttribute that contains the attributes of every element in the source collection.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable<XElement>. When you use instance method syntax to call this method, omit the first parameter.

ExceptionCondition
ArgumentNullException

source is null.

Note that unlike some other XML programming interfaces, in LINQ to XML, namespaces are surfaced as attributes.

Although Visual Basic users can use the integrated attribute axis to retrieve attributes with a specified name from a collection of elements, there is no integrated Visual Basic axis to retrieve all attributes of all elements in a collection.

This method uses deferred execution.

The following example retrieves a collection of elements, and then retrieves a collection of all attributes of all elements in the collection. Note that the resulting collection includes only the attributes of the Child1 and Child2 elements, and not the attributes of the Root element.

Note that the namespace attribute is returned by this method.


StringBuilder output = new StringBuilder();
XElement xmlTree = new XElement("Root",
    new XAttribute(XNamespace.Xmlns + "aw", "http://www.adventure-works.com"),
    new XAttribute("Att1", "content1"),
    new XAttribute("Att2", "content2"),
    new XElement("Child1",
        new XAttribute("Att1", "content3"),
        new XAttribute("Att2", "content4")
    ),
    new XElement("Child2",
        new XAttribute("Att1", "content5"),
        new XAttribute("Att2", "content6")
    )
);
output.Append(xmlTree + Environment.NewLine);
output.Append("-----" + Environment.NewLine);

IEnumerable<XAttribute> attList =
    from att in xmlTree.DescendantsAndSelf().Attributes()
    select att;

foreach (XAttribute att in attList)
    output.Append(att + Environment.NewLine);

OutputTextBlock.Text = output.ToString();


Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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