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

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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)

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.

ExceptionCondition
ArgumentNullException

source is null.

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.


StringBuilder output = new StringBuilder();
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)
    output.Append(att + Environment.NewLine);

OutputTextBlock.Text = output.ToString();


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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