mvc后台校验 通过打标签的方式

    public int Id { get; set; }         [Required(ErrorMessage = "*")]        [StringLength(5,ErrorMessage="超过长度了！")]        public string Name { get; set; }        [Required(ErrorMessage = "*")]        [StringLength(2, ErrorMessage = "超过长度了！")]        public string Sex { get; set; }        [Required(ErrorMessage = "*")]        [Range(18,120,ErrorMessage="年龄必须符合条件")]        public int Age{ get; set; }        [Required(ErrorMessage = "*")]        [EmailAddress(ErrorMessage="不符合email格式")]        public string Email { get; set; }