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 = 1000000;

            var hash = new Hashtable();

            HttpPostedFileBase file = Request.Files["imgFile"];
            if (file == null)
            {
                hash = new Hashtable();
                hash["error"] = 1;
                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"] = 1;
                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(1).ToLower()) == -1)
            {
                hash = new Hashtable();
                hash["error"] = 1;
                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"] = 0;
            hash["url"] = fileUrl;

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