c# - 从C#中的基类调用重写的方法

给定以下C#类定义和代码:

public class BaseClass
{
    public virtual void MyMethod()
    {
        ...do something...
    }
}

public class A : BaseClass
{
    public override void MyMethod()
    {
        ...do something different...
    }
}

public class B : BaseClass
{
    public override void MyMethod()
    {
        ...do something different...
    }
}

public class AnotherObject
{
    public AnotherObject(BaseClass someObject)
    {
        someObject.MyMethod(); //This calls the BaseClass method, unfortunately.
    }
}

我想调用实际上在A或B中找到的MyMethod()，假设传入的对象实际上是A或B的实例，而不是在BaseClass中找到的对象。缺少这样的事情:

public class AnotherObject
{
    public AnotherObject(BaseClass someObject)
    {
        A temp1 = someObject as A;
        if (A != null)
        {
            A.MyMethod();
        }

        B temp2 = someObject as B;
        if (B != null)
        {
            B.MyMethod();
        }
    }
}

我该怎么做？

最佳答案

调用哪种方法取决于传递给AnotherObject构造函数的类型的多态性:

AnotherObject a = new AnotherObject(new A()); // invokes A.MyMethod()
AnotherObject b = new AnotherObject(new B()); // invokes B.MyMethod()
AnotherObject c = new AnotherObject(new BaseClass()); //invokes BaseClass.MyMethod()