Re: [xml] Obtaining a string result from an XPATH function?

[Daniel Veillard <veillard redhat com>]

On Sun, Mar 17, 2002 at 11:54:57AM -0800, Horst wrote:
> Hi, 
> Perhaps this is not even possible, but I'm wondering how to get the
> string result from an XPATH expression in my C code.
>   xmlXPathInit();
>
>   doc = xmlParseFile("foo.xml");
>   if (doc == NULL) 
>     return -1;
>
>   ctxt = xmlXPathNewContext(doc);     
>   obj  = xmlXPathEvalExpression("strcat(THIS,THAT)", ctxt); 

  Hum ...  you're strcat'ing empty nodesets... it's
           xmlXPathEvalExpression("strcat('THIS','THAT')", ctxt);

> Is there a problem with my expression?

  yes it's #1 XPath pittrap.

Daniel

-- 
Daniel Veillard      | Red Hat Network https://rhn.redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/