模型中一組字段的數據注釋驗證

Question

我是MVC 3數據注釋的新手，我只是想問問是否可以在模型中的一組字段上添加驗證，如果沒有值，則顯示驗證？

這是我的數據模型中的一組字段

 public class ContactModel
    {
        public Nullable<int> Id { get; set; }


        [Display(Name = "Contact Firstname")]
        [Required(ErrorMessage = "Required!")]
        public string ContactFirstname { get; set; }

        [Display(Name = "Contact Lastname")]
        [Required(ErrorMessage = "Required!")]
        public string ContactLastname { get; set; }

        [Display(Name = "Contact Middlename")]
        public string ContactMiddlename { get; set; }

            [Display(Name = "Phone")]
            [Required(ErrorMessage = "Required!")]
            public string ContactPhone { get; set; }

            [Display(Name = "Mobile ")]
            [Required(ErrorMessage = "Required!")]
            public string ContactMobile { get; set; }

            [Display(Name = "Email")]
            [Required(ErrorMessage = "Required!")]
            public string ContactEmail { get; set; }

        [Display(Name = "Job Title")]
        [StringLength(50, ErrorMessage = "Max character reached!")]
        public string ContactJobTitle { get; set; }

    }

如果電話，手機或電子郵件中的一個沒有價值，我想添加驗證

謝謝

Answer 1

您可以實現IValidatableObject接口，並為所有必要的屬性添加驗證：

public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
    if(string.IsNullOrEmpty(Phone) || string.IsNullOrEmpty(Mobile) || string.IsNullOrEmpty(Email))
    {
         yield return new ValidationResult("Some error message");
    } 
}

當然，您應該從這些屬性中刪除[Required]屬性。