是否可以在 C# 和非托管 C++ 之间共享枚举声明? [英] Is it possible to share an enum declaration between C# and unmanaged C++?

问题描述

有没有办法在本机(非托管)C++ 和(托管)C# 之间共享枚举定义?

Is there a way to share an enum definition between native (unmanaged) C++ and (managed) C#?

我在完全非托管的代码中使用了以下枚举:

I have the following enum used in completely unmanaged code:

enum MyEnum { myVal1, myVal2 };

我们的应用程序有时会使用托管组件.该 C# 组件通过托管的 C++ 互操作 dll(来自本机 dll)获取作为整数的枚举项值.(互操作 dll 仅在需要 C# 组件时才加载.)C# 组件复制了枚举定义:

Our application sometimes uses a managed component. That C# component gets the enum item values as ints via a managed C++ interop dll (from the native dll). (The interop dll only loads if the C# component is needed.) The C# component has duplicated the enum definition:

public enum MyEnum { myVal1, myVal2 };

有没有办法在不将本机 C++ dll 转换为托管 dll 的情况下消除重复?

Is there a way to eliminate the duplication without turning the native C++ dll into a managed dll?

推荐答案

您可以使用单个 .cs 文件并在两个项目之间共享它.#include 在 C++ 中的 .cs 文件应该没问题.

You can use a single .cs file and share it between both projects. #include in C++ on a .cs file should be no problem.

这将是一个示例 .cs 文件:

This would be an example .cs file:

#if !__LINE__    
namespace MyNamespace
{
    public 
#endif

// shared enum for both C, C++ and C#
enum MyEnum { myVal1, myVal2 };

#if !__LINE__
}
#endif

如果你想在一个文件中有多个枚举，你可以这样做(虽然你必须临时定义 public 为 C/C++ 的空):

If you want multiple enums in one file, you can do this (although you have to temporarily define public to be nothing for C / C++):

#if __LINE__
#define public
#else
namespace MyNamespace
{
#endif

    public enum MyEnum { MyEnumValue1, MyEnumValue2 };
    public enum MyEnum2 { MyEnum2Value1, MyEnum2Value2 };
    public enum MyEnum3 { MyEnum3Value1, MyEnum3Value2 };

#if __LINE__
#undef public
#else
}
#endif

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