什么是＆QUOT;静态方法＆QUOT;在C＃中？ [英] What's a "static method" in C#?

问题描述

当您添加static关键字的方法是什么意思？

What does it mean when you add the static keyword to a method?

public static void doSomething(){
   //Well, do something!
}

你能添加静态关键字来上课？会是什么话呢？

Can you add the static keyword to class? What would it mean then?

推荐答案

A 静态功能，不同于一般的（实例的）功能，是不与类的实例相关联。

A static function, unlike a regular (instance) function, is not associated with an instance of the class.

A 静态类是只能包含静态成员，因此不能被实例化的类。

A static class is a class which can only contain static members, and therefore cannot be instantiated.

例如：

class SomeClass {
    public int InstanceMethod() { return 1; }
    public static int StaticMethod() { return 42; }
}

为了调用 InstanceMethod ，你需要的类的实例：

In order to call InstanceMethod, you need an instance of the class:

SomeClass instance = new SomeClass();
instance.InstanceMethod();   //Fine
instance.StaticMethod();     //Won't compile

SomeClass.InstanceMethod();  //Won't compile
SomeClass.StaticMethod();    //Fine

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