private void ExeucteChangeSubscribeCommand(string oldAcceptDirectory) { var subscribe = SubscribeCollection.First(s => s.AcceptDirectory == oldAcceptDirectory); var selectedPath = IOHelper.Instance.SelectFloder(@"请选择新的接收路径"); if (!string.IsNullOrEmpty(selectedPath) && selectedPath != oldAcceptDirectory) { subscribe.AcceptDirectory = selectedPath; ConfigHelper.Instance.SaveSettings(); } }