如何在C#中禁用无参数构造函数 [英] How to disable parameterless constructor in C#

问题描述

abstract class CAbstract
{
   private string mParam1;
   public CAbstract(string param1)
   {
      mParam1 = param1;
   }
}

class CBase : CAbstract
{
}

对于类CBase，应该通过提供参数来初始化，那么如何禁用CBase类的无参数构造函数呢?

For the class CBase, it should be initialized by providing the parameter, so how to disable the parameterless constructor for CBase class?

推荐答案

如果你在 CBase 中定义了一个参数化的构造函数，没有默认构造函数.你不需要做任何特别的事情.

If you define a parameterized constructor in CBase, there is no default constructor. You do not need to do anything special.

如果您的意图是让 CAbstract 的所有派生类实现参数化构造函数，那么这不是您可以(干净地)完成的.派生类型可以自由提供自己的成员，包括构造函数重载.

If your intention is for all derived classes of CAbstract to implement a parameterized constructor, that is not something you can (cleanly) accomplish. The derived types have freedom to provide their own members, including constructor overloads.

其中唯一要求是如果CAbstract只公开一个参数化的构造函数，那么派生类型的构造函数必须直接调用它.

The only thing required of them is that if CAbstract only exposes a parameterized constructor, the constructors of derived types must invoke it directly.

class CDerived : CAbstract
{
     public CDerived() : base("some default argument") { }
     public CDerived(string arg) : base(arg) { }
}

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