在 ASP.NET Core 中进行自定义模型验证有两种方法:

There are two ways to do custom model validation in ASP.NET Core:

• 从 ValidationAttribute 子类化的自定义属性.当您想将自定义业务逻辑应用到具有属性的特定模型property 时，这很有用.
• 实施 IValidatableObject 以进行类级验证.当您需要一次对整个模型进行验证时，请使用此选项.

• A custom attribute subclassed from ValidationAttribute. This is useful when you want to apply custom business logic to a particular model property with an attribute.
• Implementing IValidatableObject for class-level validation. Use this instead when you need to do validation on an entire model at once.

文档 两者都有例子.在您的情况下，IValidatableObject 可能是***的方法.

The documentation has examples of both. In your case, IValidatableObject would probably be the best approach.