在构造函数中使用继承（publix X（）：y） [英] Using inheritance in constructor (publix X () : y)

问题描述

我刚刚看过下面的代码，但是我不理解构造函数声明中基类的派生。这是什么？使用序数方法可以吗？

I have just seen following code but I do not understand the derivation of base class right in the constructor declaration. What is this and is this possible with ordinal methods?

public SplashAppContext(Form mainForm, Form splashForm) : base(splashForm)
{
this.mainForm = mainForm;
splashTimer.Tick += new EventHandler(SplashTimeUp);
splashTimer.Interval = 2000;
splashTimer.Enabled = true;
}

推荐答案

它正在调用基类构造函数，将类型为 Form 的参数 splashForm 传递给它。

It's calling a base class constructor, passing the argument splashForm of the type Form to it.

您也可以调用基类方法。例如，如果您重写了要稍微修改其行为的方法，则进行修改并使用 base.TheMethod（）调用基类方法。看起来像这样：

You can call base class methods as well. If you for example have overridden a method which behaviour you want to modify slightly, you do your modifications and call the base class method with base.TheMethod(). This would look like this:

public override void FireMissiles()
{
   PrimeMissiles();

   base.FireMissiles();
}

调用基类构造函数和基类方法的语法因您而异可以看到。

The syntax for calling a base class constructor and a base class method differs as you can see.

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