如何告诉数据注释验证器也验证复杂的子属性? [英] How can I tell the Data Annotations validator to also validate complex child properties?

问题描述

是否可以在验证父对象时自动验证复杂的子对象并将结果包含在填充的 ICollection 中?

Can I automatically validate complex child objects when validating a parent object and include the results in the populated ICollection<ValidationResult>?

如果我运行以下代码:

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;

namespace ConsoleApplication1
{
    public class Person
    {
        [Required]
        public string Name { get; set; }

        public Address Address { get; set; }
    }

    public class Address
    {
        [Required]
        public string Street { get; set; }

        [Required]
        public string City { get; set; }

        [Required]
        public string State { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Person person = new Person
            {
                Name = null,
                Address = new Address
                {
                    Street = "123 Any St",
                    City = "New York",
                    State = null
                }
            };

            var validationContext = new ValidationContext(person, null, null);
            var validationResults = new List<ValidationResult>();

            var isValid = Validator.TryValidateObject(person, validationContext, validationResults);

            Console.WriteLine(isValid);

            validationResults.ForEach(r => Console.WriteLine(r.ErrorMessage));

            Console.ReadKey(true);
        }
    }
}

我得到以下输出:

错误
名称字段是必需的.

但我期待类似的东西:

错误
名称字段是必需的.
State 字段是必需的.

<小时>

我提供了一个更好的子对象验证解决方案的赏金，但没有得到任何接受者，理想情况下

---

I offered a bounty for a better child object validation solution but didn't get any takers, ideally

• 验证子对象到任意深度
• 处理每个对象的多个错误
• 正确识别子对象字段上的验证错误.

我仍然对框架不支持这一点感到惊讶.

I'm still surprised the framework doesn't support this.

推荐答案

您需要创建自己的验证器属性(例如，[CompositeField])来验证子属性.

You will need to make your own validator attribute (eg, [CompositeField]) that validates the child properties.

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