/// <summary>
    /// DTO 用戶－請求參數(shu)
    /// 輸(shu)入(ru)參數(shu)各屬性都是可空的,為空時(shi)不(bu)去驗證,并且查詢時(shi)不(bu)去構造(zao)查詢條件
    /// </summary>
    public class RequestUserInfo : RequestBase
    {
        public int? Id { get; set; }
        [MaxLength(10, ErrorMessage = "用(yong)戶名最(zui)多為(wei)10個字符")]
        public string UserName { get; set; }
        [EmailAddress(ErrorMessage = "Email地址不是合法的")]
        public string Email { get; set; }
        [MaxLength(20, ErrorMessage = "用戶名最多為20個字符")]
        public string RealName { get; set; }
    }

    public class UserInfo : Entity
    {
        [DisplayName("用戶名"), Required]// StringLength(50, MinimumLength = 4, ErrorMessage = "用戶名只能(neng)由~50個字符組成")
        public string UserName { get; set; }
        [DisplayName("真實姓(xing)名(ming)"), Required]//StringLength(30, MinimumLength = 6, ErrorMessage = "真實姓名只能由6~30個字符(fu)組成")
        public string RealName { get; set; }
        [DisplayName("密碼"), Required]// StringLength(20, MinimumLength = 6, ErrorMessage = "密碼由(you)6~20個字(zi)符組成")
        public string Password { get; set; }
        [DisplayName("電(dian)子郵件"), Required, EmailAddress]
        public string Email { get; set; }
    }

        /// <summary>
        /// 為(wei)已經存(cun)在的對象進行automapper
        /// </summary>
        /// <typeparam name="TSource"></typeparam>
        /// <typeparam name="TResult"></typeparam&gt;
        /// <param name="self"></param>
        /// <param name="result"></param>
        /// <returns></returns>
        public static TResult MapTo<TResult>(this object self, TResult result)
        {
            if (self == null)
                throw new ArgumentNullException();
            Mapper.CreateMap(self.GetType().UnderlyingSystemType, typeof(TResult));
            return (TResult)Mapper.Map(self, result, self.GetType(), typeof(TResult));

        }

   public void Update(RequestUserInfo request)
        {
            var entity = userRepository.GetModel().FirstOrDefault(i => i.Id == request.Id);
            request.MapTo<UserInfo>(entity);
            userRepository.Update(entity);
        }