覆盖 C# 派生类中的常量 [英] Overriding constants in derived classes in C#

问题描述

在 C# 中，可以在派生类中重写常量吗?我有一组相同的类，除了一些常量值，所以我想创建一个定义所有方法的基类，然后在派生类中设置相关常量.这可能吗?

In C# can a constant be overridden in a derived class? I have a group of classes that are all the same bar some constant values, so I'd like to create a base class that defines all the methods and then just set the relevant constants in the derived classes. Is this possible?

我宁愿不只是将这些值传递给每个对象的构造函数，因为我希望增加多个类的类型安全性(因为两个具有不同常量的对象进行交互是没有意义的).

I'd rather not just pass in these values to each object's constructor as I would like the added type-safety of multiple classes (since it never makes sense for two objects with different constants to interact).

推荐答案

如果你想覆盖它，它不是一个常量；).尝试虚拟只读属性(或受保护的 setter).

It's not a constant if you want to override it ;). Try a virtual read-only property (or protected setter).

只读属性:

public class MyClass {
    public virtual string MyConst { get { return "SOMETHING"; } }
}
...
public class MyDerived : MyClass {
    public override string MyConst { get { return "SOMETHINGELSE"; } }
}

受保护的设置器:

public class MyClass {
    public string MyConst { get; protected set; }

    public MyClass() {
        MyConst = "SOMETHING";
    }
}

public class MyDerived : MyClass {
    public MyDerived() {
        MyConst = "SOMETHING ELSE";
    }
}

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