private void UpLoadImage(string _PathFile)
        {
            string _UpPath = Config.Default.Upload_Url_1;
            if (Common._SystemType == 2) _UpPath = Config.Default.Upload_Url_2;
            if (!String.IsNullOrEmpty(_UpPath) && !String.IsNullOrEmpty(_PathFile))
            {
                try
                {
                    System.Net.WebClient wc = new System.Net.WebClient();
                    wc.Credentials = System.Net.CredentialCache.DefaultCredentials;
                    wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
                    wc.UploadFileCompleted += new System.Net.UploadFileCompletedEventHandler(Upload_Completed);//这里是回调函数
                    wc.UploadFileAsync(new Uri(_UpPath), "POST", _PathFile, _PathFile);
                }
                catch(Exception ex) {
                    Console.WriteLine(ex.Message);
                }
            }
        }