I\'m growing thin learving mvc3. I have the following code in my controller
[HttpPost]
public ActionResult Accreditation(Accreditation accreditation)
Are really uploading data? I'd suggest you use this way. Create a parameter of type HttpPostedFileBase with the same name as the input field and test for its content length property.
Checking this link will the fastest way for you to move on.
MVC 3 file upload and model binding