Extensions Class
This class contains the LINQ to XML extension methods that enable you to evaluate XPath expressions.
Namespace: System.Xml.XPath
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)
| Name | Description | |
|---|---|---|
 | CreateNavigator(XNode) | Creates an XPathNavigator for an XNode. |
| CreateNavigator(XNode, XmlNameTable) | Creates an XPathNavigator for an XNode. The XmlNameTable enables more efficient XPath expression processing. |
| XPathEvaluate(XNode, String) | Evaluates an XPath expression. |
| XPathEvaluate(XNode, String, IXmlNamespaceResolver) | Evaluates an XPath expression, resolving namespace prefixes using the specified IXmlNamespaceResolver. |
| XPathSelectElement(XNode, String) | Selects an XElement using a XPath expression. |
| XPathSelectElement(XNode, String, IXmlNamespaceResolver) | Selects an XElement using a XPath expression, resolving namespace prefixes using the specified IXmlNamespaceResolver. |
| XPathSelectElements(XNode, String) | Selects a collection of elements using an XPath expression. |
| XPathSelectElements(XNode, String, IXmlNamespaceResolver) | Selects a collection of elements using an XPath expression, resolving namespace prefixes using the specified IXmlNamespaceResolver. |
There is some performance penalty for using these methods. Using LINQ to XML queries yields better performance.
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.
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.
