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Extensions.XPathSelectElements Method (XNode, String)

Selects a collection of elements using an XPath expression.

Namespace:  System.Xml.XPath
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)
public static IEnumerable<XElement> XPathSelectElements(
	this XNode node,
	string expression
)

Parameters

node
Type: System.Xml.Linq.XNode

The XNode on which to evaluate the XPath expression.

expression
Type: System.String

A String that contains an XPath expression.

Return Value

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

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type XNode. 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).

Although the ordering of returned collections is not specified in the XML XPath Language 1.0 Recommendation, this extension method returns nodes in document order.

Note that nodes are returned in document order even when you use a reverse axis, such as preceding-sibling or ancestor-or-self.

The following example creates a small XML tree and uses XPathSelectElements to select a set of elements.

XElement root = new XElement("Root",
    new XElement("Child1", 1),
    new XElement("Child1", 2),
    new XElement("Child1", 3),
    new XElement("Child2", 4),
    new XElement("Child2", 5),
    new XElement("Child2", 6)
);
IEnumerable<XElement> list = root.XPathSelectElements("./Child2");
foreach (XElement el in list)
    Console.WriteLine(el);

This example produces the following output:

<Child2>4</Child2>
<Child2>5</Child2>
<Child2>6</Child2>

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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.

.NET Framework

Supported in: 3.5
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