.NET Framework Class Library
Extensions..::.Attributes Method (IEnumerable<(Of <(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
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)
Syntax

Visual Basic (Declaration)
<ExtensionAttribute> _
Public Shared Function Attributes ( _
    source As IEnumerable(Of XElement), _
    name As XName _
) As IEnumerable(Of XAttribute)
Visual Basic (Usage)
Dim source As IEnumerable(Of XElement)
Dim name As XName
Dim returnValue As IEnumerable(Of XAttribute)

returnValue = source.Attributes(name)
C#
public static IEnumerable<XAttribute> Attributes(
    this IEnumerable<XElement> source,
    XName name
)
Visual C++
[ExtensionAttribute]
public:
static IEnumerable<XAttribute^>^ Attributes(
    IEnumerable<XElement^>^ source, 
    XName^ name
)
JScript
public static function Attributes(
    source : IEnumerable<XElement>, 
    name : XName
) : IEnumerable<XAttribute>

Parameters

source
Type: System.Collections.Generic..::.IEnumerable<(Of <(XElement>)>)
An IEnumerable<(Of <(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<(Of <(XAttribute>)>)
An IEnumerable<(Of <(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<(Of <(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).
Remarks

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

This method uses deferred execution.

Examples

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.

C#
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);
Visual Basic
Dim xmlTree As XElement = _
    <Root Att1="content1" Att2="content2">
        <Child1 Att1="content3" Att2="content4">
        </Child1>
        <Child2 Att1="content5" Att2="content6">
        </Child2>
    </Root>

Dim attList = From att In xmlTree.Elements.Attributes("Att1") _
                          Select att

For Each att As XAttribute In attList
    Console.WriteLine(att)
Next

This example produces the following output:

Att1="content3"
Att1="content5"
Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information

.NET Framework

Supported in: 3.5

.NET Compact Framework

Supported in: 3.5

XNA Framework

Supported in: 3.0
See Also

Reference

Other Resources

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