如何覆盖在C＃中的setter仅吸气属性？ [英] How to override a getter-only property with a setter in C#?

问题描述

今天遇到了一个问题，我需要重写基类的唯一吸气属性同时具有getter和setter。目前的共识似乎是，这是不可能的，但我认为我找到了一个方法。

Ran into a problem today where I needed to override a base class's getter-only property with both a getter and setter. Current consensus seems to be that this is impossible, but I think that I found a method.

public abstract class A
{
    public abstract int X { get; }
}
public class B : A
{
    public override int X { get { return 0; } }
}
/*public class C : B  //won't compile: can't override with setter
{
    private int _x;
    public override int X { get { return _x; } set { _x = value; } }
}*/
public abstract class C : B  //abstract intermediate layer
{
    public sealed override int X { get { return this.XGetter; }  }
    protected abstract int XGetter { get; }
}
public class D : C  //does same thing, but will compile
{
    private int _x;
    protected sealed override int XGetter { get { return this.X; } }
    public new virtual int X { get { return this._x; } set { this._x = value; } }
}

我觉得 D 现在相当于一个类从 B继承，同时还能够在二传手覆盖。这是正确的？

I think that D is now equivalent to a class inheriting from B while also being able to override in a setter. Is this correct?

推荐答案

小心你的解决方案，因为它隐藏了A和B的初衷话虽这么说，你的。解决方案不工作，甚至转换为基类时

Be careful with your solution as it hides the original intent for A and B. That being said, your solution does work, even when casting to base classes.

例如：

        D d = new D();
        d.X = 2;
        B b = d as B;

        Assert.AreEqual(2, b.X);

如果基类可以被修改，我建议使用反射。

If the base classes can be modified, I recommend using reflection.

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