Asp.net mvc上传多张图片后台存储

前台页面通过<file name="img">标签数组上传图片，后台根据Request.Files["img"]来接收前台上传的图片。
 1 System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
 2             if (files.Count == 0)
 3                 return false;
 4             for (int i = 0; i < files.AllKeys.Count(); i++)
 5             {
 6                 if (files.AllKeys[i] != "img")
 7                 {
 8                     if (files[i].FileName.Length > 0)
 9                     {
10                         System.Web.HttpPostedFile postedfile = files[i];
11                         string filePath = "";
12                         var ext = Path.GetExtension(postedfile.FileName);
13                         var fileName = DateTime.Now.Ticks.ToString() + ext;
14                         // 组合文件存储的相对路径
15                         filePath = "/Upload/images/" + fileName;
16                         // 将相对路径转换成物理路径
17                         var path = Server.MapPath(filePath);
18                         postedfile.SaveAs(path);
19                         string fex = Path.GetExtension(postedfile.FileName);
20                         //存储产品轮播图信息
21                         ProductCarousel model = new ProductCarousel();
22                         model.ProductID = productID;
23                         model.PicSlider = filePath;
24                         db.ProductCarousels.Add(model);
25                         db.SaveChanges();
26                     }
27                 }
28                 
29             }