public ActionResult Upload(HttpPostedFileBase file, ResultModel model)
        {
            var AsNumCheck = DBBridge.CheckAssignmentNum(model.AssignmentId);

            if (AsNumCheck.Count == 0)
            {
                ViewBag.Message = "There is no Assignment Id which you typed.";
                return(View());
            }

            if (file != null && file.ContentLength > 0)
            {
                if (!file.FileName.Contains(".cs"))
                {
                    ViewBag.Message = "The file extension is not .cs.";
                    return(View());
                }
                var path = Path.Combine("C:\\Users\\deniz\\source\\repos\\GradProj\\Metrics\\", "Assignment.cs");
                file.SaveAs(path);
            }
            else
            {
                ViewBag.Message = "The file is empty!";
                return(View());
            }
            return(RedirectToAction("UploadResult", new { AssignmentId = model.AssignmentId }));
        }