private void Button_Click(object sender, RoutedEventArgs e)
        {
            // system  s=Project.selectByname("QDDL.nlbs").FirstOrDefault ();

            List <role> _role = UserRole.Select();

            if (_role == null)
            {
                return;
            }
            MessageBox.Show("角色列表个数" + _role.Count);
            //UserRole .SelectBySysGuid (s.guid );
        }