DataAnnotations：递归验证整个对象图

我有一个对象图，上面散布着 DataAnnotation 属性，其中对象的某些属性是本身具有验证属性的类，等等。

在以下场景中：

public class Employee
{
    [Required]
    public string Name { get; set; }

    [Required]
    public Address Address { get; set; }
}

public class Address
{
    [Required]
    public string Line1 { get; set; }

    public string Line2 { get; set; }

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

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

如果我尝试验证Employee's Address没有价值PostalCode，那么我想要（并期望）一个例外，但我没有得到。我是这样做的：

var employee = new Employee
{
    Name = "Neil Barnwell",
    Address = new Address
    {
        Line1 = "My Road",
        Town = "My Town",
        PostalCode = "" // <- INVALID!
    }
};

Validator.ValidateObject(employee, new ValidationContext(employee, null, null));

我还有什么其他选择Validator这将确保所有属性都得到验证递归地?

这是选择加入属性方法的替代方法。我相信这将正确遍历对象图并验证一切。

public bool TryValidateObjectRecursive<T>(T obj, List<ValidationResult> results) {

bool result = TryValidateObject(obj, results);

var properties = obj.GetType().GetProperties().Where(prop => prop.CanRead 
    && !prop.GetCustomAttributes(typeof(SkipRecursiveValidation), false).Any() 
    && prop.GetIndexParameters().Length == 0).ToList();

foreach (var property in properties)
{
    if (property.PropertyType == typeof(string) || property.PropertyType.IsValueType) continue;

    var value = obj.GetPropertyValue(property.Name);

    if (value == null) continue;

    var asEnumerable = value as IEnumerable;
    if (asEnumerable != null)
    {
        foreach (var enumObj in asEnumerable)
        {
            var nestedResults = new List<ValidationResult>();
            if (!TryValidateObjectRecursive(enumObj, nestedResults))
            {
                result = false;
                foreach (var validationResult in nestedResults)
                {
                    PropertyInfo property1 = property;
                    results.Add(new ValidationResult(validationResult.ErrorMessage, validationResult.MemberNames.Select(x => property1.Name + '.' + x)));
                }
            };
        }
    }
    else
    {
        var nestedResults = new List<ValidationResult>();
        if (!TryValidateObjectRecursive(value, nestedResults))
        {
            result = false;
            foreach (var validationResult in nestedResults)
            {
                PropertyInfo property1 = property;
                results.Add(new ValidationResult(validationResult.ErrorMessage, validationResult.MemberNames.Select(x => property1.Name + '.' + x)));
            }
        }
    }
}

return result;
}

最新的代码：https://github.com/reustmd/DataAnnotationsValidatorRecursive https://github.com/reustmd/DataAnnotationsValidatorRecursive

包裹：https://www.nuget.org/packages/DataAnnotationsValidator/ https://www.nuget.org/packages/DataAnnotationsValidator/

另外，我还更新了这个解决方案来处理循环对象图。感谢您的反馈。