XmlNodeExtensions.XPathSelectSingleNode Method (XmlNode, string, IXmlNamespaceResolver)XmlNodeExtensions.XPathSelectSingleNode Method (XmlNode, String, IXmlNamespaceResolver)XmlNodeExtensions::XPathSelectSingleNode Method (XmlNode^, String^, IXmlNamespaceResolver^)

Evaluates the specified XPath 2.0 expression to select a single node.

Namespace: XmlPrime.ExtensionMethods XmlPrime.ExtensionMethods XmlPrime.ExtensionMethods
Assembly: XmlPrime.ExtensionMethods (in XmlPrime.ExtensionMethods.dll)

Syntax

Public Shared Function XPathSelectSingleNode( _
    node As System.Xml.XmlNode, _
    expression As String, _
    resolver As System.Xml.IXmlNamespaceResolver _
) As System.Xml.XmlNode

public static System.Xml.XmlNode XPathSelectSingleNode(
    System.Xml.XmlNode node,
    string expression,
    System.Xml.IXmlNamespaceResolver resolver
)

public:
static System.Xml::XmlNode^ XPathSelectSingleNode(
    System.Xml::XmlNode^ node, 
    String^ expression, 
    System.Xml::IXmlNamespaceResolver^ resolver
)

Parameters

node

Type: System.Xml.XmlNodeSystem.Xml.XmlNodeSystem.Xml::XmlNode^

The XmlNode XmlNode XmlNode to use as the context item.

expression

Type: System.StringSystem.StringSystem::String^

A string String String representing the XPath 2.0 expression.

resolver

Type: System.Xml.IXmlNamespaceResolverSystem.Xml.IXmlNamespaceResolverSystem.Xml::IXmlNamespaceResolver^

The IXmlNamespaceResolver IXmlNamespaceResolver IXmlNamespaceResolver object used to resolve namespace prefixes in the XPath 2.0 expression.

Return Value

Type: System.Xml.XmlNodeSystem.Xml.XmlNodeSystem.Xml::XmlNode^

The result of the evaluating the XPath 2.0 expression specified; otherwise, null a null reference (Nothing in Visual Basic) nullptr if there are no query results.

Exceptions

Exception	Condition
ArgumentNullException ArgumentNullException ArgumentNullException	expression is `null` a null reference (`Nothing` in Visual Basic) `nullptr` or resolver is `null` a null reference (`Nothing` in Visual Basic) `nullptr`.
InvalidCastException InvalidCastException InvalidCastException	The return type was an item which was not a node.
XdmException XdmException XdmException	An error occurred compiling or evaluating the XPath 2.0 expression.

Remarks

If the XPath 2.0 expression returns more than one node the first node is returned.