Question

我有一个定义为

的类型

public class Autocomplete
    {
        public Guid Id { get; set; }
        public string Label { get; set; }
    }

然后我有一个这种类型的模型

public class MPEngagementActivity : IActivity
    {
        [UIHint("Hidden")]
        public Guid Id { get; set; }

        [UIHint("Hidden")]
        //TODO: GET THIS FROM THE LOGGED IN USER
        public Guid CreatedBy { get; set; }

        [UIHint("Hidden")]
        public int ActivityType { get; set; }

        [Required(ErrorMessage = "Please select an Organisation")]
        [Display(Name="Constituency")]
        public Autocomplete Organisation { get; set; }

        [UIHint("ReadOnly")]
        [Display(Name = "MP Office Default Contact")]
        public String DefaultContact { get; set; }

        [Display(Name = "MP Contact")]
        public Autocomplete MainContact { get; set; }
}

正如您所看到的，其中一个属性被标记为必需，但是当测试模型返回为有效时，即使未在表单中设置该属性，该ID也将返回为0并且标签为空。 / p>

如何让mvc正确验证？

Answer 1

public class Autocomplete
{
    public Guid Id { get; set; }
    public string Label { get; set; }

    // This should do the trick with the standard Required attribute
    public static implicit operator string(Autocomplete ac)
    {
        return ac.Label;
    }

    // Optionally, if you want to use a custom required instead, this may be more correct
    public override string ToString()
    {
        return Label;
    }
}

然后，您只需将[Required]属性放在Autocomplete属性上。

Answer 2

在类的属性

上设置[Required]属性

   public class Autocomplete
    {
        [Requried]
        public Guid Id { get; set; }
        [Required]
        public string Label { get; set; }
    }

必需属性和复杂类型mvc 5

2 个答案: