我们无法根据父类强制转换为子类 [英] Unable to Cast from Parent Class to Child Class

问题描述

我想从父类转换为子类，但我得到一个InvalidCastException。子类只有int类型的一个属性。有谁知道我需要做什么？

I am trying to cast from a parent class to a child class but I get an InvalidCastException. The child class only has one property of type int. Does anyone know what I need to do?

推荐答案

您不能施放哺乳动物为狗 - 它可能是一只猫

You can't cast a mammal into a dog - it might be a cat.

您不能投了食物放进三明治 - 这可能是一个汉堡

You can't cast a food into a sandwich - it might be a cheeseburger.

您不能投了轿车进入法拉利 - 这可能是本田，或者更具体地说，你不能投法拉利360摩德纳法拉利360 Challange Stradale的 - 有部分不同的充，尽管他们都法拉利360。

You can't cast a car into a Ferrari - it might be a Honda, or more specifically, You can't cast a Ferrari 360 Modena to a Ferrari 360 Challange Stradale - there are differnt parts, even though they are both Ferrari 360s.

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