How to Upload file without using File Upload Control?

 Hi Experts,
 
I've been researching for this for almost a week now and a can't find the correct solution still. 
 My problem is I am creating a page that will accept a QueryString with the PathAndFile that I want to upload on my server. The URL should look something like this:
http://localhost/SaveDoc.aspx?File=C:\Reports\Audit1.pdf
The file is a path on the client PC that I want to upload on the server. Actually the page doesn't have any controls on it and will just return an XML returning the documentId. This page acts like a webservice.
How can I do that without using the File Upload Control? I tried using System.IO.File Class, I thought it was working perfectly. But when I deployed it on the server the File is being searched on the Server Path and not on Client PC.
 
Thanks for the help in advance!!! 

 
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