什么是“本”构造，它有什么作用 [英] what is 'this' constructor, what is it for

问题描述

我在学习过程中，我有一个问题，我还没有能够找到一个满意的答案。

I'm in the learning process and I have a question I havent been able to find a satisfactory answer for.

这我需要它破败。我一直看到它，人们建议修复我使用它的code。我真的不知道究竟它的作用。如果有人会这么好心的给我就可以了基本的破败我会很高兴。

this I need a rundown on it. I keep seeing it and people have suggested fixes for my code that use it. I really have no idea what exactly it does. If someone would be so kind as to give me a basic rundown on it I would be really happy.

推荐答案

它被用来指代另一个构造在同一类。您可以使用它来继承另一个构造：

It's used to refer to another constructor in the same class. You use it to "inherit" another constructor:

public MyClass() {}

public MyClass(string something) : this() {}

在上面，调用第二个构造函数时，它首先执行该参数的构造函数，在执行本身之前。请注意，使用：这个（）是相当于：基地（），但它指的是一个构造函数代替父类，同一类

In the above, when the second constructor is invoked, it executes the parameterless constructor first, before executing itself. Note that using : this() is the equivalent of : base(), except it refers to a constructor in the same class, instead of the parent class.

有一个关于构造这里的文章（MSDN ），它提供了一个实例：

There's an article about constructors here (MSDN), which provides a usage example:

public Employee(int annualSalary)
{
    salary = annualSalary;
}

public Employee(int weeklySalary, int numberOfWeeks)
    : this(weeklySalary * numberOfWeeks)
{
}

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