clr项目dll之间的继承 [英] Inheritance between clr project dlls

问题描述

我有一个用c ++ / cli编写的抽象基类。此类位于项目中。我还有其他继承抽象基类的项目。因此，结构如下所示。

I have an abstract base class which is written with c++/cli. This class is located in a project. And i have other projects which inherit the abtract base class. So, the structure is like the following.

基础项目：

public ref class Base abstract
{
  // implementation
  virtual CommonFunc();
};
public delegate void Foo();

派生项目A：

public ref class A : public Base
{
  // implementation
};

衍生项目B：

public ref class B : public Base
{
  // implementation
};

等等。我可以在C＃项目中同时调用A和B类。没问题。

And, so on. I can call both A and B classes on a C# project. No problem with that.

但是，当我尝试使用Base的Foo委托时，会收到如下错误：

However, when i try to use Foo delegate of Base, it gets an error like following;

错误： Foo是 Foo和 Foo之间的不明确引用

Error : 'Foo' is an ambiguous reference between 'Foo' and 'Foo'

这个。我在C＃项目中为A和B的引用定义了extern别名。因此，当我使用AliasA.Foo之类的设备时，就可以了。但是，在两个A和B dll中存在两个Foo。

To get rid of this. I defined extern alias for references of A and B in the C# project. So, when i use like AliasA.Foo, it's ok. But, there exists two Foo's in two A and B dlls. That's a problem.

最后，当我尝试开发如下代码时，编译器不知道AliasBase.Base是A的基数。

And at the end, when i try to develop some code like the following, the compiler doesn't know that the AliasBase.Base is base of A.

AliasBase.Base base = new A();
base.CommonFunc();
base = new B();
base.CommonFunc();

错误：无法将类型'A'隐式转换为'Base'

Error : Cannot implicitly convert type 'A' to 'Base'

我希望我能说清楚。夏季我有三个dll。其中一个是基类的dll，其他是集成类的dll。继承的类的dll内部包含它们自己的基本实现。有没有办法摆脱基类的多个实现？

I hope I made myself clear. To summerize; i have three dlls. One of them is base's dll and the others are inteherited class's dlls. The inherited class's dlls contains their own base implementation inside. Is there a way of get rid of multiple implemtantatins of the base class?

注意：是的，如果我将它们收集到项目中，将没有问题。但是，我被要求为所有派生项提供单独的dll。

Note: Yes, if i collect them into a project, there will be no problem. But, i'm requested to deliver seperated dlls for all derived items.

预先感谢。

推荐答案

正如汉斯·帕森特（Hans Passant）在评论中所建议的那样，我摆脱了头文件，只使用了引用，最后继承成功了。我只需要在C＃端为基类设置一个别名，并且它与父类具有继承关系。因此，以下代码现在可以正常工作。

As Hans Passant suggested on comment, i got rid of header files and used only references,at the end inheritence worked. I had to set only one alias for base class on C# side and it has an inheritance relationship with parant classes. So, the following codes are working now.

AliasBase.Base base = new A();
base.CommonFunc();
base = new B();
base.CommonFunc();

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