public ActionResult Create(RegisterModel model)
        {
            ViewBag.Des = "新增操作员";
            var roles = _service.GetAllUserRoles().TakeWhile(n => n.SystemName != SystemUserRoleNames.Administrators);

            ViewBag.Roles = new SelectList(roles, "Id", "Name");
            User newuser;

            if (model.Id == 0)
            {
                var user = new User
                {
                    UserGuid = Guid.NewGuid(),
                    Username = model.UserName,
                    Email    = model.Email,
                    Mobile   = model.Mobile,
                    Active   = true,
                    //加密存储
                    Password = Encrypt.EncryptString(model.Password),
                };
                //默认增加注册角色
                // 先插入
                _service.InsertUser(user);
                newuser = _service.GetUserByUsername(user.Username);
            }
            else
            {
                newuser          = _service.GetUserById(model.Id);
                newuser.Username = model.UserName;
                newuser.Password = Encrypt.EncryptString(model.Password);
                newuser.Email    = model.Email;
                newuser.Mobile   = model.Mobile;
                ViewBag.Des      = "编辑用户";
            }

            var role = _service.GetUserRoleById(model.RoleId);

            //先只有一个角色
            newuser.UserRoles.Clear();
            newuser.UserRoles.Add(role);

            try
            {
                _service.UpdateUser(newuser);
                Success();
                model.Empty();
            }
            catch (Exception e)
            {
                Error(e.Message);
            }
            return(View(model));
        }