private void OkButton_Click(object sender, RoutedEventArgs e) { var failed = Connection.SaveUser(_toDelete); var t = string.Empty; for (var i = 0; i < failed.Count; i++) { if (i != failed.Count - 1) { t += failed[i] + "、"; } else { t += failed[i]; } } if (failed.Count != 0) { MessageBox.Show("以下用户未能保存,因为已存在相同用户名的用户:\n" + t, "提示", MessageBoxButton.OK, MessageBoxImage.Error); } UserHelper.GetUserBelongs(); Close(); }