private void LoadUser()
        {
            PrivilegeService _proxy = Common.Util.CreateProxy();

            try
            {
                IList <User> _users = null;
                using (_proxy as IDisposable)
                {
                    _users = _proxy.QueryUsers(currentRole.ID);
                }
                InitTreeListView(_users);
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message, "提示");
                return;
            }
        }