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Extensions.Attributes Method (IEnumerable<XElement>, XName)

Returns a filtered collection of the attributes of every element in the source collection. Only elements that have a matching XName are included in the collection.

Namespace:  System.Xml.Linq
Assemblies:   System.Xml.XDocument (in System.Xml.XDocument.dll)
  System.Xml.Linq (in System.Xml.Linq.dll)

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

Parameters

source
Type: System.Collections.Generic.IEnumerable<XElement>

An IEnumerable<T> of XElement that contains the source collection.

name
Type: System.Xml.Linq.XName

The XName to match.

Return Value

Type: System.Collections.Generic.IEnumerable<XAttribute>
An IEnumerable<T> of XAttribute that contains a filtered collection of the attributes of every element in the source collection. Only elements that have a matching XName are included in the 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. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

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

This method uses deferred execution.

The following example retrieves a collection of elements, which in this case includes the Child1 and Child2 elements. It then retrieves all attributes of that child collection with a name of Att1.

XElement xmlTree = new XElement("Root",
    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")
    )
);

IEnumerable<XAttribute> attList = from att in xmlTree.Elements().Attributes("Att1")
                                  select att;

foreach (XAttribute att in attList)
    Console.WriteLine(att);

This example produces the following output:

Att1="content3"
Att1="content5"

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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