c# - 在C＃中调用基本构造函数(Calling the base constructor in C#)

Question

If I inherit from a base class and want to pass something from the constructor of the inherited class to the constructor of the base class, how do I do that?

(如果我从基类继承，并希望将某些东西从继承类的构造函数传递给基类的构造函数，该怎么做？)

For example,

(例如，)

If I inherit from the Exception class I want to do something like this:

(如果我从Exception类继承，我想做这样的事情：)

class MyExceptionClass : Exception
{
     public MyExceptionClass(string message, string extraInfo)
     {
         //This is where it's all falling apart
         base(message);
     }
}

Basically what I want is to be able to pass the string message to the base Exception class.

(基本上，我想要的是能够将字符串消息传递给基本Exception类。)

  ask by lomaxx translate from so

Answer 1

Modify your constructor to the following so that it calls the base class constructor properly:

(将您的构造函数修改为以下代码，以便它正确调用基类的构造函数：)

public class MyExceptionClass : Exception
{
    public MyExceptionClass(string message, string extrainfo) : base(message)
    {
        //other stuff here
    }
}

Note that a constructor is not something that you can call anytime within a method.

(注意，构造函数不是您可以在方法中随时调用的。)

That's the reason you're getting errors in your call in the constructor body.

(这就是在构造函数主体中调用时出错的原因。)