C＃如何在对象构建之后执行代码（postconstruction） [英] C# How to execute code after object construction (postconstruction)

问题描述

正如你可以在下面的代码中看到的，DoStuff（）方法是在构造一个Child对象之前在Init（）之前调用的。

As you can see in the code below, the DoStuff() method is getting called before the Init() one during the construction of a Child object.

在我有许多儿童阶级的情况下。因此，在每个孩子的构造函数中直接在Init（）之后重复调用DoStuff（）方法不会是一个优雅的解决方案。

I'm in a situation where I have numerous child classes. Therefore, repeating a call to the DoStuff() method directly after Init() in the constructor of each child wouldn't be an elegant solution.

可以在父类中创建某种类型的后构造函数，它将在子构造函数之后执行？这样，我可以调用DoStuff（）方法在那里。

Is there any way I could create some kind of post constructor in the parent class that would be executed after the child's constructor? This way, I could call to the DoStuff() method there.

如果你有任何其他的设计想法，可以解决我的问题，我想听到它！

If you have any other design idea which could solve my problem, I'd like to hear it too!

abstract class Parent
{
    public Parent()
    {
        DoStuff();
    }

    protected abstract void DoStuff();
}

class Child : Parent
{
    public Child()
    // DoStuff is called here before Init
    // because of the preconstruction
    {
        Init();
    }

    private void Init()
    {
        // needs to be called before doing stuff
    }

    protected override void DoStuff() 
    {
        // stuff
    }
}

推荐答案

如何实现：

abstract class Parent
{
    public Parent()
    {
        Init();
        DoStuff();
    }

    protected abstract void DoStuff();
    protected abstract void Init();
}

class Child : Parent
{
    public Child()
    {
    }

    protected override void Init()
    {
        // needs to be called before doing stuff
    }

    protected override void DoStuff() 
    {
        // stuff
    }
}

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