注释模型列表的验证

我真的不确定标题是否清晰。让我更好地解释一下：

我有两种型号：

1-客户响应cs:

public class GuestResponse
    {
        [Required(ErrorMessage="Please enter your name")]
        public string Name { get; set; }
        [Required(ErrorMessage = "Please enter your email address")]
        [RegularExpression(".+''@.+''..+", ErrorMessage="Please enter a valid email address")]
        public string Email { get; set; }
        [Required(ErrorMessage = "Please enter your phone number")]
        public string Phone { get; set; }
        [Required(ErrorMessage = "Please especify wheter you will attend")]
        public bool? WillAttend { get; set; }
    }

2-公司客户响应cs:

public class CompanyGuestResponse
    {
        [Required(ErrorMessage = "Please enter your company name")]
        public string Name { get; set; }
        [Required(ErrorMessage = "Please enter your company email address")]
        [RegularExpression(".+''@.+''..+", ErrorMessage = "Please enter a valid email address")]
        public string Email { get; set; }
        [Required(ErrorMessage = "Please enter your company phone number")]
        public string Phone { get; set; }
        public IList<GuestResponse> GuestResponses { get; set;} 
    }

我还有一个CompanyGuestResponse模型的强类型视图，其中有一个带有表的窗体，该窗体允许用户为属性GuestResponse提供输入。

我希望只有在表中已填充的行被正确验证（即，不要尝试验证未填充的行）并且至少有一行被正确填充的情况下，才能提交表单。

我试图通过为List创建ViewModel验证中描述的自定义注释来实现这一点，但没有成功（mvc只是忽略了列表注释，并在GuestResponse类中验证了注释）：

[EnsureOneElementAttribute(ErrorMessage = "At least a person is required")]
public IList<GuestResponse> GuestResponses { get; set;} 

结果：

http://postimage.org/image/b2jn7ta69/