public async Task <IActionResult> Add(Users users)
        {
            bool res = false;

            users.UpdateDate = DateTime.Now;
            if (users.Id > 0)
            {
                var data = await _usersServices.QueryByID(users.Id);

                if (data == null)
                {
                    return(Error("修改用户失败,未找到该用户。"));
                }
                else
                {
                    res = await _usersServices.Update(users, null, new List <string> {
                        "Password"
                    });
                }
            }
            else
            {
                var data = await _usersServices.QueryByClause(m => m.UserName == users.UserName);

                if (data != null)
                {
                    return(Error("登录姓名:" + users.UserName + "已经存在!"));
                }
                users.Password = Util.Helpers.Encrypt.Md5By32("123456");
                res            = await _usersServices.Add(users);
            }
            if (res)
            {
                return(Success("保存成功"));
            }
            else
            {
                return(Error("保存失败"));
            }
        }