XQuery.EvaluateToItem Method ()XQuery.EvaluateToItem Method ()XQuery::EvaluateToItem Method ()
Returns an XPathItemXPathItemXPathItem representing the result of evaluating the XQuery program,
or
null
a null reference (Nothing
in Visual Basic)
nullptr
if the query returns the empty sequence.
Syntax
Public Function EvaluateToItem() As System.Xml.XPath.XPathItem
public System.Xml.XPath.XPathItem EvaluateToItem()
public: System.Xml.XPath::XPathItem^ EvaluateToItem()
Return Value
Type: System.Xml.XPath.XPathItemSystem.Xml.XPath.XPathItemSystem.Xml.XPath::XPathItem^
An XPathItemXPathItemXPathItem, or null
a null reference (Nothing
in Visual Basic)
nullptr
if the query returns the empty sequence.
Exceptions
Exception | Condition |
XdmExceptionXdmExceptionXdmException | An error occurred evaluating the query. |
InvalidOperationExceptionInvalidOperationExceptionInvalidOperationException | An error is raised if the expression returns more than one item, or if the query the query is an updating expression. |
LicenceExceptionLicenceExceptionLicenceException | This version of XmlPrime has expired. |
Remarks
The item returned will either be an instance of XPathNavigatorXPathNavigatorXPathNavigator (if the expression returns a node), XPathAtomicValueXPathAtomicValueXPathAtomicValue (if the expression returns an atomic value) or XPathFunctionItemXPathFunctionItemXPathFunctionItem (if the expression returns a function item).
This method is not suitable for queries which use fn:put
. Call to fn:put
will raise
an exception.