Evaluation of Microsoft XPath exstensions ms:utc()

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I am trying to evaluate the Microsoft ms:utc() XPath extension in an XPath
expression. When I do, I get an exception that I need an XsltContext. Given
these are microsoft extentions, it seems unlikely that I would need to
implement my own IXsltContextFunction class for microsoft published
functions. Thus I suspect I am missing something. My Code looks as follows:

this.XPathQueryString = this.textBoxQueryString.Text;
XPathDocument xPathDocument = new XPathDocument(this.XmlFileName);
XPathNavigator xPathNavigator = xPathDocument.CreateNavigator();
XPathExpression expression = XPathExpression.Compile(this.XPathQueryString);

XmlNamespaceManager manager = new XmlNamespaceManagexPathNavigator.NameTable);

manager.AddNamespace("ms", "urn:schemas-microsoft-com:xslt");
expression.SetContext(manager);

switch (expression.ReturnType)
{
case XPathResultType.Number:
double d = (double)xPathNavigator.Evaluate(expression);
this.DisplaySimpleResult(d.ToString());
break;

case XPathResultType.NodeSet:
XPathNodeIterator nodeInterator = xPathNavigator.Select(expression);
this.DisplayNodeResult(nodeInterator);
break; ...

[Oleg Tkachenko [MVP]]

jerryn wrote:

I am trying to evaluate the Microsoft ms:utc() XPath extension in an XPath
expression. When I do, I get an exception that I need an XsltContext. Given
these are microsoft extentions, it seems unlikely that I would need to
implement my own IXsltContextFunction class for microsoft published
functions. Thus I suspect I am missing something. My Code looks as follows:

this.XPathQueryString = this.textBoxQueryString.Text;
XPathDocument xPathDocument = new XPathDocument(this.XmlFileName);
XPathNavigator xPathNavigator = xPathDocument.CreateNavigator();
XPathExpression expression = XPathExpression.Compile(this.XPathQueryString);

XmlNamespaceManager manager = new XmlNamespaceManagexPathNavigator.NameTable);

manager.AddNamespace("ms", "urn:schemas-microsoft-com:xslt");
expression.SetContext(manager);

switch (expression.ReturnType)
{
case XPathResultType.Number:
double d = (double)xPathNavigator.Evaluate(expression);
this.DisplaySimpleResult(d.ToString());
break;

case XPathResultType.NodeSet:
XPathNodeIterator nodeInterator = xPathNavigator.Select(expression);
this.DisplayNodeResult(nodeInterator);
break; ...

Unfortunately XPathNavigator doesn't support MIcrosoft ms: extention
functions, they are only available in XSLT context.
Take a look at http://www.tkachenko.com/blog/archives/000649.html for a
sample code that you can use to hook those extension functions into
XPathNavigator.

--
Oleg Tkachenko [XML MVP, MCPD]
http://blog.tkachenko.com | http://www.XmlLab.Net | http://www.XLinq.Net