You should be able to add them to the view, include them in the POST and have MVC take care of the model binding:
@using (Html.BeginForm("ActioName", "ControllerName", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<div>
<input type="file" name="file" />
<select name="fileType">
<option value="JPG">Photo</option>
<option value="DOC">Word</option>
</select>
<input type="submit" value="OK" class="button" />
</div>
}
[HttpPost]
public ActionResult UploadFile(HttpPostedFileBase file, string fileType)
{
//Validate the fileType
// Verify that the user selected a file
if (file != null && file.ContentLength > 0)
{
//do something here...
}
}