Upload file asynchronously using dynamically added input file control

Any suggestions how I would save a file to the server asynchronously, using a dynamically adde开发者_Python百科d (by jQuery) input file control (non-server control)?

I can't use server controls as the control will be inside a jquery facebox (does not play nice with server controls, i.e. duplicate id's, etc)

---

1. Google for jquery Uploadify plugin.
2. You will need a controller on server side which accept the request and save file to ther server.