Question

I’ve successfully removed references to Request.Form in my code, but I haven’t seen any ASP.NET MVC 3 support for binding Request.Files to my view model. Would best practice be to just pass the Request.Files object (HttpFileCollectionBase) to whatever method processes my attachments? E.g.,

[HttpPost]
public ActionResult UpdateStatus(StatusViewModel vm)
{
   bool updated = HandleUpdate(Request.Files, vm);
   ...
   return View("Updated");
}

Answer 1

You can simply declare Action parameters of type HttpPostedFileBase, like so:

public ActionResult Method(HttpPostedFileBase fileUploaded)

You can bind to arrays of like-named instances, as well.

public ActionResult Method(HttpPostedFileBase[] filesUploaded)

and, HttpPostedFileBase can be a member of your view model.

public class MyModel{
    public string Name{get; set;}
    public HttpPostedFileBase FileUploaded{get; set;}
}