XPathNavigator::Select Method (String^, IXmlNamespaceResolver^)
.NET Framework (current version)
Selects a node set using the specified XPath expression with the IXmlNamespaceResolver object specified to resolve namespace prefixes.
Assembly: System.Xml (in System.Xml.dll)
public: virtual XPathNodeIterator^ Select( String^ xpath, IXmlNamespaceResolver^ resolver )
Parameters
- xpath
-
Type:
System::String^
A String representing an XPath expression.
- resolver
-
Type:
System.Xml::IXmlNamespaceResolver^
The IXmlNamespaceResolver object used to resolve namespace prefixes.
Return Value
Type: System.Xml.XPath::XPathNodeIterator^An XPathNodeIterator that points to the selected node set.
| Exception | Condition |
|---|---|
| ArgumentException | The XPath expression contains an error or its return type is not a node set. |
| XPathException | The XPath expression is not valid. |
The following example illustrates selecting a node set using the Select method with the XmlNamespaceManager object specified to resolve namespace prefixes in the XPath expression.
XPathDocument^ document = gcnew XPathDocument("contosoBooks.xml");
XPathNavigator^ navigator = document->CreateNavigator();
XmlNamespaceManager^ manager = gcnew XmlNamespaceManager(navigator->NameTable);
manager->AddNamespace("bk", "http://www.contoso.com/books");
XPathNodeIterator^ nodes = navigator->Select("/bk:bookstore/bk:book/bk:price", manager);
// Move to the first node bk:price node.
if(nodes->MoveNext())
{
// Now nodes.Current points to the first selected node.
XPathNavigator^ nodesNavigator = nodes->Current;
// Select all the descendants of the current price node.
XPathNodeIterator^ nodesText = nodesNavigator->SelectDescendants(XPathNodeType::Text, false);
while(nodesText->MoveNext())
{
Console::WriteLine(nodesText->Current->Value);
}
}
The example takes the contosoBooks.xml file as an input.
<?xml version="1.0" encoding="utf-8" ?> <bookstore xmlns="http://www.contoso.com/books"> <book genre="autobiography" publicationdate="1981-03-22" ISBN="1-861003-11-0"> <title>The Autobiography of Benjamin Franklin</title> <author> <first-name>Benjamin</first-name> <last-name>Franklin</last-name> </author> <price>8.99</price> </book> <book genre="novel" publicationdate="1967-11-17" ISBN="0-201-63361-2"> <title>The Confidence Man</title> <author> <first-name>Herman</first-name> <last-name>Melville</last-name> </author> <price>11.99</price> </book> <book genre="philosophy" publicationdate="1991-02-15" ISBN="1-861001-57-6"> <title>The Gorgias</title> <author> <name>Plato</name> </author> <price>9.99</price> </book> </bookstore>
.NET Framework
Available since 2.0
Silverlight
Available since 4.0
Available since 2.0
Silverlight
Available since 4.0
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