In Delphi XE is it possible to use XPath with a TXmlDocument
component?
I'm aware I can use late binding to access the MSXML2 and then use XPath:
XML := CreateOleObject('MSXML2.DOMDocument.3.0') ;
XML.async := false;
XML.SetProperty('SelectionLanguage','XPath');
But I wanna know if TXmlDocument
installed with Delphi XE supports XPath.
I can't find anything in the TXMLDocument documentation about XPath.
XML example, from the OmniXML XPath demo:
<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
<book>
<title lang="eng">Harry Potter</title>
</book>
<book>
<title lang="eng">Learning XML</title>
</book>
<book>
<title lang="slo">Z OmniXML v lepso prihodnost</title>
<year>2006</year>
</book>
<book>
<title>Kwe sona standwa sam</title>
</book>
</bookstore>
Try something like this:
uses
XMLDoc, XMLDom, XMLIntf;
// From a post in Embarcadero's Delphi XML forum.
function selectNode(xnRoot: IXmlNode; const nodePath: WideString): IXmlNode;
var
intfSelect : IDomNodeSelect;
dnResult : IDomNode;
intfDocAccess : IXmlDocumentAccess;
doc: TXmlDocument;
begin
Result := nil;
if not Assigned(xnRoot) or not Supports(xnRoot.DOMNode, IDomNodeSelect, intfSelect) then
Exit;
dnResult := intfSelect.selectNode(nodePath);
if Assigned(dnResult) then
begin
if Supports(xnRoot.OwnerDocument, IXmlDocumentAccess, intfDocAccess) then
doc := intfDocAccess.DocumentObject
else
doc := nil;
Result := TXmlNode.Create(dnResult, nil, doc);
end;
end;
var
IDoc: IXMLDocument;
INode: IXMLNode;
begin
IDoc := LoadXMLDocument('.\books.xml');
INode := SelectNode(IDoc.DocumentElement,'/bookstore/book[2]/title');
end;
Just as an FYI for others, I'll leave this in: OmniXML supports XPath, and has a demo that shows really well how to use it. It's also free, comes with source, supports Unicode, and has pretty good support through it's forums.