void postUrl_UploadDataCompleted(object sender, System.Net.UploadDataCompletedEventArgs e) { if (e.Error != null || e.Result.Length <= 0 || e.Cancelled) { return; } var resultstr = Encoding.UTF8.GetString(e.Result); if (string.IsNullOrEmpty(resultstr))return; var postmp3 = new MyWebClient(); postmp3.OpenRead(new Uri(resultstr)); var fdsf = postmp3.ResponseUri.ToString(); fdsf = fdsf + "sss"; }