在其他类构造函数上使用基类 C#

发布于 2024-09-14 09:38:58 字数 562 浏览 3 评论 0原文

我正在尝试使用 C# 来理解观察者模式，首先我有一个名为 Stock 的抽象类作为主题，然后我创建一个creteSubject 类，所以我将其称为 IBM，因为creteSubject 类将继承来自股票，所以我做了这样的事情：

class IBM : Stock
{
    // Constructor
    public IBM(string symbol, double price)
      : base(symbol, price)
    {
    }
}

我不明白的是“：base（符号，价格）”为什么我应该使用它？这意味着什么？它看起来像继承了符号和价格变量，但为什么如果它们被声明为公共 IBM 函数上的参数，

我从我在以下位置找到的示例中获取此代码：

http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1

原文

I'm trying to understand the observer pattern using C#, first I have an abstract class working as Subject called Stock, then I'm creating a concreteSubject class so I'm going to call it IBM, as the concreteSubject Class is going to inherit from Stock, so I do something like this:

class IBM : Stock
{
    // Constructor
    public IBM(string symbol, double price)
      : base(symbol, price)
    {
    }
}

what I don't understand is the " : base(symbol, price) " why should I use it? what that means? it looks like its inherit the symbol and price variables, but why if they are declared as parameters on the public IBM function

I get this code from an example that I found in:

http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1

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英雄似剑 2024-09-21 09:38:58

它调用基类 (Stock) 构造函数。如果您查看 Stock 类代码，它看起来像这样

public class Stock {
    private string _symbol;
    private double _price;

    public Stock(string symbol, double price)  // this constructor is called
    {
         this._symbol = symbol;
         this._price = price;
    }
}

请注意，它只是 Stock 类中的构造函数，因此您必须在所有派生类中通过 base(符号，价格）。

It calls base class (Stock) constructor. If you look in Stock class code it looks like this

public class Stock {
    private string _symbol;
    private double _price;

    public Stock(string symbol, double price)  // this constructor is called
    {
         this._symbol = symbol;
         this._price = price;
    }
}

Note that it is only constructor in Stock class so you must call it explicit in all derived classes by base(symbol, price).

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