Dimitre, what is the "XPath Visualizer"?

"Dimitre Novatchev" <dnovatchev@y...> wrote in message
news:38mhv9F5poue1U1@i......
>
> "Xerox" <anon@a...> wrote in message
> news:uykVfSxHFHA.2648@T......
> > Can I not execute the xpath without a stylesheet?
> >
> > I want something like this: totalPrice = XMLDocument.Evaluate
> > ("sum(//item/@price)")
> >
> No, there's no method to evaluate an XPath expression that evaluates to a
> scalar (something that is not a node-set).
>
> Using the transformNode() method is what is used inside the XPath
Visualizer
> to obtain the result of evaluating any such XPath expression. It first
> catches the failure of selectNodes(), then it analyses the error message
to
> determine that this is not another type of error, then finally, if the
error
> message is for trying to evaluate an XPath expression returning a scalar,
it
> invokes transformNode() with a dynamically modified (to have the
particular
> XPath expression as the value of an "select" attribute) generic stylesheet
> that produces the result of evaluating the XPath expression.
>
>
> Cheers,
> Dimitre Novatchev.
>
>