Kindeditor图片上传Controller

asp.net MVC Kindeditor 图片、文件上传所用的Controller

  [HttpPost, AllowAnonymous]
         public ActionResult UploadImage()
         {
             string savePath = VirtualPaths.ImgDir + "/Upload/";
             string saveUrl = "/Upload/";
             string fileTypes = "gif,jpg,jpeg,png,bmp";
             int maxSize = ;

             var hash = new Hashtable();

             HttpPostedFileBase file = Request.Files["imgFile"];
             if (file == null)
             {
                 hash = new Hashtable();
                 hash["error"] = ;
                 hash["message"] = "请选择文件";
                 return Json(hash, "text/html;charset=UTF-8");
             }

             string dirPath = savePath;
             if (!Directory.Exists(dirPath))
             {
                 Directory.CreateDirectory(dirPath);
             }

             string fileName = file.FileName;
             string fileExt = Path.GetExtension(fileName).ToLower();

             ArrayList fileTypeList = ArrayList.Adapter(fileTypes.Split(','));

             if (file.InputStream == null || file.InputStream.Length > maxSize)
             {
                 hash = new Hashtable();
                 hash["error"] = ;
                 hash["message"] = "上传文件大小超过限制";
                 return Json(hash, "text/html;charset=UTF-8");
             }

             if (string.IsNullOrEmpty(fileExt) ||
                 Array.IndexOf(fileTypes.Split(','), fileExt.Substring().ToLower()) == -)
             {
                 hash = new Hashtable();
                 hash["error"] = ;
                 hash["message"] = "上传文件扩展名是不允许的扩展名";
                 return Json(hash, "text/html;charset=UTF-8");
             }

             string newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) +
                                  fileExt;
             string filePath = dirPath + newFileName;
             file.SaveAs(filePath);
             string fileUrl = saveUrl + newFileName;

             hash = new Hashtable();
             hash["error"] = ;
             hash["url"] = fileUrl;

             return Json(hash, "text/html;charset=UTF-8");
         }