递归使用验证注释和IValidatableObject [英] Recursive validation using annotations and IValidatableObject

问题描述

我想验证嵌套的对象（在MVC senss不机型），使用说明和一些自定义的code。

I am trying to validate nested objects (not models in the MVC senss) using annotations and some custom code.

我发现下面的职位有用

<一个href=\"http://stackoverflow.com/questions/6938877/using-data-annotations-validation-manually-and-object-graphs\">Using数据注释验证手动和对象图

作为一个答案的建议，我已经创建了一个额外的程序在容器类验证嵌套对象。这里是我修改的测试code

As suggested in an answer, I've created an extra routine in the container class to validate the nested object. Here's my modified test code

public class Customer : IValidatableObject
{
    public Customer()
    {
        Details = new CustomerDetails();
    }

    [Required]
    [MaxLength(2)]
    public string Name
    {
        get;
        set;
    }

    public CustomerDetails Details
    {
        get;
        private set;
    }

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        var context = new ValidationContext(this.Details, validationContext.ServiceContainer, validationContext.Items);
        var results = new List<ValidationResult>();
        Validator.TryValidateObject(this.Details, context, results);
        return results;
    }
}

不过，我有一个获得的所有的验证错误，设置为true validateAllProperties调用TryValidateObject即使问题。

However I have problems getting all the validation errors, even when calling TryValidateObject with validateAllProperties set to true.

        var context = new ValidationContext(cs, null, null);
        var results = new List<ValidationResult>();
        Validator.TryValidateObject(cs, context, results,true);

如果有在容器中的任何错误，只有这些显示。只有当有容器对象中没有错误，在嵌套对象错误显示。我怀疑这事做与验证rouine返回一个完整列表，并且不能够从容器添加到（现有的）列表（？）

If there are any errors in the container, only these will show. Only when there are no errors in the container object, errors in the nested object will show. I suspect it has something to do with the Validate rouine returning a full list, and not being able to add to an (existing) list from the container(?)

是否有任何修改，我可以作出例行程序来获取所有的错误显示？

Are there any modifications I can make to routine to get all errors to show?

推荐答案

看到这个答案： http://stackoverflow.com/a /七十二万四千九百四十四分之三百四十零万零六百二十七

因此​​，有在你的类'atributes一个错误，因此验证方法不会被调用。
我建议使用<一个href=\"http://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations.customvalidationattribute.aspx\"相对=nofollow> CustomValidationAttribute 是这样的：

So, there is an error in your class' atributes, and therefore Validate method doesn't get called. I suggest using CustomValidationAttribute like this:

[CustomValidation(typeof(Customer), "ValidateRelatedObject")]
public CustomerDetails Details
{
    get;
    private set;
}

public static ValidationResult ValidateRelatedObject(object value, ValidationContext context)
{
    var context = new ValidationContext(value, validationContext.ServiceContainer, validationContext.Items);
    var results = new List<ValidationResult>();
    Validator.TryValidateObject(value, context, results);

    // TODO: Wrap or parse multiple ValidationResult's into one ValidationResult

    return result;

}

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