public JsonResult FileUpload()
        {
            var retList = new LinkedList<RetJsonModel>();
            for (var i = 0; i < Request.Files.Count; i++)
            {
                var file = Request.Files[i];
                if (file == null) continue;
                var ret = new RetJsonModel
                {
                    ContentType = file.ContentType,
                    UserId = Session["LoggedUserID"].ToString()
                };
                if (ret.ContentType.Contains("image/"))
                {
                    ret.IsAccept = 0;
                    ret.FileTypeAccept = "yes";
                    ret.FileName = DateTime.Now.ToString("yyyyMMddHHmmss") + '_' + i + '_' + file.FileName;
                    if (!string.IsNullOrEmpty(ret.UserId))
                    {

                        ret.Url = "/Content/Users/" + ret.UserId + "/" + ret.FileName;
                        var path = Path.Combine(Server.MapPath("~/Content/Users/" + ret.UserId + ""), ret.FileName);
                        var stream = file.InputStream;
                        using (var fileStream = System.IO.File.Create(path))
                        {
                            stream.CopyTo(fileStream);
                        }
                        var resizer = new ImageResizer(@path);
                        var thumbtailPath = Path.Combine(Server.MapPath("~/Content/Users/" + ret.UserId + "/thumbtail/"), ret.FileName);
                        resizer.Resize(400, 400, ImageEncoding.Jpg90);
                        if (!Directory.Exists(Server.MapPath("~/Content/Users/" + ret.UserId + "/thumbtail/")))
                            Directory.CreateDirectory(Server.MapPath("~/Content/Users/" + ret.UserId + "/thumbtail/"));
                        resizer.SaveToFile(@thumbtailPath);
                        var image = new ImageViewModel();
                        var imageMetaDate = new ImageMetaData(Server.MapPath(ret.Url));
                        image.FileName = ret.FileName;
                        image.UpdateDate = DateTime.Now;
                        image.UserId = long.Parse(ret.UserId);
                        image.Url = ret.Url;
                        image.ContentType = file.ContentType;
                        _db.Images.Add(image);
                        imageMetaDate.FetchData();
                        var metadata = imageMetaDate.GetMetaData();
                        _db.ImageMetaData.Add(metadata);
                        _db.SaveChanges();
                    }
                    else
                    {
                        ret.IsAccept = 1;
                        ret.Error = "Member Session Expired";
                    }

                }
                else
                {
                    ret.IsAccept = 1;
                    ret.FileName = file.FileName;
                    ret.Error = "Content Type Deny";
                }
                retList.AddLast(ret);
            }
            var javaScriptSerializer = new JavaScriptSerializer();
            var jsonString = javaScriptSerializer.Serialize(retList);
            return Json(jsonString);
        }
 public ActionResult UploadImage(int id, HttpPostedFileWrapper upload)
 {
     string ret;
     if (upload != null)
     {
         if (upload.ContentLength <= 1024 * 1024 * 5)
         {
             var imageName = DateTime.Now.ToString("yyyyMMddHHmmss") + '_' + upload.FileName;
             if (!System.IO.Directory.Exists(Server.MapPath("/Content/Users/" + id)))
             {
                 System.IO.Directory.CreateDirectory(Server.MapPath("/Content/users/" + id));
             }
             var path = System.IO.Path.Combine(Server.MapPath("/Content/users/" + id), imageName);
             var url = "/Content/users/" + id + "/" + imageName;
             upload.SaveAs(path);
             var resizer = new ImageResizer(@path);
             var thumbtailPath = System.IO.Path.Combine(Server.MapPath("~/Content/Users/" + id + "/thumbtail/"), upload.FileName);
             resizer.Resize(400, 400, ImageEncoding.Jpg90);
             if (!System.IO.Directory.Exists(Server.MapPath("~/Content/Users/" + id + "/thumbtail/")))
                 System.IO.Directory.CreateDirectory(Server.MapPath("~/Content/Users/" + id + "/thumbtail/"));
             resizer.SaveToFile(@thumbtailPath);
             var image = new ImageViewModel();
             var imageMetaDate = new ImageMetaData(Server.MapPath(image.Url));
             imageMetaDate.FetchData();
             var metadata = imageMetaDate.GetMetaData();
             image.ContentType = upload.ContentType;
             image.UpdateDate = DateTime.Now;
             image.UserId = long.Parse(Session["LoggedUserID"].ToString());
             image.Url = url;
             image.FileName = imageName;
             _db.Images.Add(image);
             _db.ImageMetaData.Add(metadata);
             _db.SaveChanges();
             ret = url;
         }
         else
         {
             ret = "<p style=\"color:red\">image exceed the maximum 5MB</p>";
         }
     }
     else
     {
         ret = "<p style=\"color:red\">image is empty</p>";
     }
     return Content(ret);
 }