图片或文件上传阿里云服务

 //图片上传到阿里云
        [AcceptVerbs(HttpVerbs.Post)]
        public JsonResult Upload(HttpPostedFileBase fileData, string tupianming)
        {
            if (fileData != null)
            {
                try
                {
                    // 文件上传后的保存路径         
                    var extName = Path.GetExtension(fileData.FileName);
                    if (string.IsNullOrWhiteSpace(extName))
                    {
                        return Json(new { Success = false, Message = "extName is null!" });
                    }
                    var extNameToLower = extName.ToLower();       
                    var accessId = System.Configuration.ConfigurationManager.AppSettings["ossKeyId"];
                    var accessKey = System.Configuration.ConfigurationManager.AppSettings["ossKeySectet"];
                    var bucketName = "xiaoyaodijun"; //System.Configuration.ConfigurationManager.AppSettings["bucketName"];
                    var endpoint = "http://oss-cn-qingdao.aliyuncs.com ";
                    var extenname = ".oss-cn-qingdao.aliyuncs.com/";
                    //图片的存储路径和名字
                    var fileName = "xiaoyao/124" + extNameToLower;
                    OssClient client = new OssClient(endpoint, accessId, accessKey);
                    System.IO.Stream inputStream = fileData.InputStream;
                    ObjectMetadata objectMetadata = new ObjectMetadata();
                    client.PutObject(bucketName, fileName, inputStream, objectMetadata);
                    //返回图片路径
                    AccessControlList bucketAcl = client.GetBucketAcl(bucketName);                 
                    var result = ((!bucketAcl.Grants.Any()) ? client.GeneratePresignedUri(bucketName, fileName, System.DateTime.Now.AddMinutes(5.0)).AbsoluteUri : string.Format("http://{0}{1}{2}", bucketName, extenname, fileName));
                    inputStream.Dispose();

                }
                catch (Exception ex)
                {
                    return Json(new { Success = false, Message = ex.Message });
                }
            }
            else
            {
                return Json(new { Success = false, Message = "请选择要上传的文件！" });
            }

            return null;
        }