public static bool Upload(string url, string path)

        {

            using (WebClient client = new WebClient())

            {

                try

                {

                    //同步上传不容易报错

                    byte[] data = client.UploadFile(new Uri(url), "POST", path);

                    string reply = Encoding.UTF8.GetString(data);

                    return true;

                    //client.UploadFileAsync(new Uri(url), "POST", path);

                    //client.UploadFileCompleted += delegate(object sender, UploadFileCompletedEventArgs e)

                    //{

                    //    byte[] data = (byte[])e.Result;

                    //    string reply = Encoding.UTF8.GetString(data);

、

                    //};

                }

                catch (Exception e)

                {

                    return false;

                    throw new Exception("文件上传失败:" + e.Message + " " + path);

                }

            }

        }