public ActionResult AddGameProduct(LastProductedModel model)
        {
            var newlastprod = new LastProductedModel();
            //存储上传图片文件
            var file = Request.Files["pic"];
            if(file!=null)
            {
                var filepath = Path.Combine(HttpContext.Server.MapPath("~/assets/images/Product"), Path.GetFileName(file.FileName));
                newlastprod.ProductImgSrc = "assets/images/Product/" + Path.GetFileName(file.FileName);
                file.SaveAs(filepath);
            }

            newlastprod.ProductName = model.ProductName;
            newlastprod.ProductDescribe = model.ProductDescribe;
            newlastprod.ProductPublishTime = DateTime.Now;

            _db.LastProductedModule.Add(newlastprod);
            _db.SaveChanges();

            return View("BackGround_GameProject");
        }
        public ActionResult EditGameProject(LastProductedModel model)
        {
            if (!ModelState.IsValid) return View("BackGround_GameProject");
            var nowEditModel = _db.LastProductedModule.FirstOrDefault(it => it.id == model.id);
            if (nowEditModel != null)
            {
                nowEditModel.ProductName = model.ProductName;
                nowEditModel.ProductPublishTime = DateTime.Now;
                nowEditModel.ProductDescribe = model.ProductDescribe;
                nowEditModel.ProductImgSrc = model.ProductImgSrc;
            }
            _db.SaveChanges();

            return View("BackGround_GameProject");
        }