IValidatableObject 未触发

Question

我正在尝试使用此处描述的 IValidatableObject http://davidhayden.com/blog/dave/archive/2010/12/31/ASPNETMVC3ValidationIValidatableObject.aspx。

但是当我尝试验证时它不会触发，ModelState.IsValid 始终是true。

这是我的型号代码：

[MetadataType(typeof(RegistrationMetaData))]
public partial class Registration : DefaultModel
{
    [Editable(false)]
    [Display(Name = "Property one")]
    public int PropertyOne { get; set; }
}

public class RegistrationMetaData :IValidatableObject
{
    [Required(ErrorMessage = "Customer no. is required.")]
    [Display(Name = "Customer no.")]
    public string CustomerNo { get; set; }

    [Display(Name = "Comments")]
    public string Comments { get; set; }

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        if (new AccountModel().GetProfile(CustomerNo) == null)
            yield return new ValidationResult("Customer no. is not valid.", new[] { "CustomerNo" });
    }
}

我扩展了一个名为 Registration 的 LINQ to SQL 表，我的第一个猜测是这在 Meta 类上是不可能的，但我不确定？

我没有收到任何错误，它构建得很好，但是Validate 方法不会触发。我错过了什么？

Answer 1

这是因为应该实现IValidatableObject而不是RegistrationMetaData的是Registration模型：

[MetadataType(typeof(RegistrationMetaData))]
public partial class Registration : IValidatableObject
{
    [Editable(false)]
    [Display(Name = "Property one")]
    public int PropertyOne { get; set; }

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        if (new AccountModel().GetProfile(CustomerNo) == null)
            yield return new ValidationResult("Customer no. is not valid.", new[] { "CustomerNo" });
    }
}

public class RegistrationMetaData
{
    [Required(ErrorMessage = "Customer no. is required.")]
    [Display(Name = "Customer no.")]
    public string CustomerNo { get; set; }

    [Display(Name = "Comments")]
    public string Comments { get; set; }
}