validation - 使用 Enterprise Library Validation Application Block 按出生日期验证年龄

Question

我有以下情况：具有属性 BithDay 的域模型。我希望能够验证年龄（将根据生日计算）低于 150 岁。我可以通过使用内置验证器来做到这一点，还是必须自己构建？someoane 可以为我提供 DomainValidator 的示例吗？

Answer 1

You can use a RelativeDateTimeValidator to validate an age based on a Birth Date. For example:

public class Person
{
    [RelativeDateTimeValidator(-150, DateTimeUnit.Year, RangeBoundaryType.Inclusive, 
        0, DateTimeUnit.Year, RangeBoundaryType.Ignore,
        MessageTemplate="Person must be less than 150 years old.")]
    public DateTime BirthDate
    {
        get;
        set;
    }
}

// 150 Year old person
Person p = new Person() { BirthDate = DateTime.Now.AddYears(-150) };

var validator = ValidationFactory.CreateValidator<Person>();
ValidationResults vrs = validator.Validate(p);

foreach (ValidationResult vr in vrs)
{
    Console.WriteLine(vr.Message);
}

This will print: "Person must be less than 150 years old."

Answer 2

你可以尝试这样的事情：

public class Person
{
    public DateTime BirthDate { get; set; }

    [RangeValidator(0, RangeBoundaryType.Inclusive, 150, RangeBoundaryType.Exclusive,
        MessageTemplate="Person must be less than 150 years old.")]
    public int Age
    {
        get { return (DateTime.Now - this.BirthDate).Days / 365; }
    }
}