internal static QName GetQNameAttribute(XPathCompiler xpath, XdmItem contextItem, string attributePath)
{
string exp = "for $att in " + attributePath +
" return if (contains($att, ':')) then resolve-QName($att, $att/..) else " +
" if (contains($att,'{')) then QName(substring-before(substring-after($att,'{'),'}'),substring-after($att,'}')) else" +
" QName('', $att)";
XdmAtomicValue qname = (XdmAtomicValue)xpath.EvaluateSingle(exp, contextItem);
return(qname == null ? null : new QName(qname.ToString()));
}
/**
* Show how to get stylesheets that are associated with a given
* xml document via the xml-stylesheet PI (see http://www.w3.org/TR/xml-stylesheet/).
*/
public static void ExampleUseAssociated(String sourceUri)
{
// Create a Processor instance.
Processor processor = new Processor();
XsltExecutable exec;
// Load the source document
XdmNode input = processor.NewDocumentBuilder().Build(new Uri(sourceUri));
Console.WriteLine("=============== source document ===============");
Console.WriteLine(input.OuterXml);
Console.WriteLine("=========== end of source document ============");
// Navigate to the xml-stylesheet processing instruction having the pseudo-attribute type=text/xsl;
// then extract the value of the href pseudo-attribute if present
String path = @"/processing-instruction(xml-stylesheet)[matches(.,'type\s*=\s*[''""]text/xsl[''""]')]" +
@"/replace(., '.*?href\s*=\s*[''""](.*?)[''""].*', '$1')";
XPathSelector eval = processor.NewXPathCompiler().Compile(path).Load();
eval.ContextItem = input;
XdmAtomicValue hrefval = (XdmAtomicValue)eval.EvaluateSingle();
Console.WriteLine("evaluated");
String href = hrefval.ToString();
if (href == null || href == "")
{
Console.WriteLine("No suitable xml-stylesheet processing instruction found");
return;
}
else if (href[0] == '#')
{
// The stylesheet is embedded in the source document and identified by a URI of the form "#id"
Console.WriteLine("Locating embedded stylesheet with href = " + href);
String idpath = "id('" + href.Substring(1) + "')";
eval = processor.NewXPathCompiler().Compile(idpath).Load();
eval.ContextItem = input;
XdmNode node = (XdmNode)eval.EvaluateSingle();
if (node == null)
{
Console.WriteLine("No element found with ID " + href.Substring(1));
return;
}
exec = processor.NewXsltCompiler().Compile(node);
}
else
{
// The stylesheet is in an external document
Console.WriteLine("Locating stylesheet at uri = " + new Uri(input.BaseUri, href));
// Fetch and compile the referenced stylesheet
exec = processor.NewXsltCompiler().Compile(new Uri(input.BaseUri, href.ToString()));
}
// Create a transformer
XsltTransformer transformer = exec.Load();
// Run it
transformer.SetParameter(new QName("", "", "a-param"), new XdmAtomicValue("hello to you!"));
transformer.InitialContextNode = input;
XdmDestination results = new XdmDestination();
transformer.Run(results);
Console.WriteLine("1: " + results.XdmNode.StringValue);
}