Darren Clark wrote:

> Is it possible to check if a file exists from inside of XSL?
> 
> e.g. if the XML that i am styling passing in a image name and path, Can i 
> call out to any .NET methods to check if a file exists?

XSLT 1.0 only has the function named document to load additional XML 
data, there is nothing to check the existance of any file on the local 
file system or to check the HTTP status of a URL on a HTTP server.

What you can do however is set up some HTTP server application using 
e.g. PHP or JSP or ASP.NET that checks file existance or HTTP status, 
returns the results in XML format and then the stylesheet could use
   document('http://example.com/urlchecker.php?url=someURLToCheckHere')
for instance.

Or within the .NET XSLT processor you have two ways to extend the 
functionality, you can use extension objects or you can use script in 
the stylesheet. Details on these approaches are here:
<http://msdn.microsoft.com/library/default.asp?url=/msdnmag/issues/02/03/xml/toc.asp>

Both way you can use the classes available in the .NET framework to 
solve the task you want and use the result in the stylesheet.

-- 

	Martin Honnen --- MVP XML
	http://JavaScript.FAQTs.com/