将 C++ 枚举导入 C#
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Importing C++ enumerations into C#
提问by Mykroft
I'm currently working on creating a new C# project that needs to interact with an older C++ application. There is an error enumeration that already exists in the C++ app that I need to use in the C# app.
我目前正在创建一个需要与旧 C++ 应用程序交互的新 C# 项目。我需要在 C# 应用程序中使用 C++ 应用程序中已存在的错误枚举。
I don't want to just re declare the enumeration in C# because that could cause sync issues down the line if the files aren't updated together.
我不想只是在 C# 中重新声明枚举，因为如果文件没有一起更新，这可能会导致同步问题。
All that being said my question is this: Is there a way for me to taken an enumeration declared like so:
说了这么多，我的问题是：有没有办法让我进行如下声明的枚举：
typedef enum
{
eDEVICEINT_ERR_FATAL = 0x10001
...
} eDeviceIntErrCodes;
and use it in a C# program like so:
并在 C# 程序中使用它，如下所示：
eDeviceIntErrCodes.eDEVICEINT_ERR_FATAL
采纳答案by Brian Ensink
Check out the PInvoke Interop Assistant tool http://www.codeplex.com/clrinterop/Release/ProjectReleases.aspx?ReleaseId=14120. Its a useful tool for generating PInvoke signatures for native methods.
查看 PInvoke Interop Assistant 工具http://www.codeplex.com/clrinterop/Release/ProjectReleases.aspx?ReleaseId=14120。它是为本地方法生成 PInvoke 签名的有用工具。
If I feed it your enum it generates this code. There is a command line version of the tool included so you could potentially build an automated process to keep the C# definition of the enum up to date whenever the C++ version changes.
如果我将它提供给您的枚举，它会生成此代码。该工具包含一个命令行版本，因此您可以潜在地构建一个自动化过程，以便在 C++ 版本更改时使枚举的 C# 定义保持最新。
public enum eDeviceIntErrCodes
{
/// eDEVICEINT_ERR_FATAL -> 0x10001
eDEVICEINT_ERR_FATAL = 65537,
}
回答by Adam Haile
Simple answer is going to be no. Sorry, you are going to have to re-declare.
简单的答案是否定的。抱歉，您将不得不重新申报。
I have, in the past however, written scripts to import my C++ enums to a C# format in a enums.cs file and run it as part of the build, that way everything syncs.
然而，我过去曾编写脚本将我的 C++ 枚举导入 enums.cs 文件中的 C# 格式，并将其作为构建的一部分运行，这样一切都会同步。
回答by Joel Lucsy
If you had declared the enum like:
如果您已将枚举声明为：
namespace blah
{
enum DEVICE_ERR_CODES
{
eDEVICEINT_ERR_FATAL = 0x10001,
eDEVICEINT_ERR_OTHER = 0x10002,
};
}and in another file:
并在另一个文件中：
DEVICE_ERR_CODES eDeviceIntErrCodes;and named the enum file with a .cs extension, you might be able to get it to work. You'd reference it like:
并使用 .cs 扩展名命名枚举文件，您也许可以让它工作。你会像这样引用它：
DEVICE_ERR_CODES err = DEVICE_ERR_CODES.eDEVICEINT_ERR_FATAL;回答by Rob
In C/C++ you can #include a .cs file which contains the enumeration definition. Careful use of preprocessor directives takes care of the syntax differences between C# and C.
在 C/C++ 中，您可以 #include 包含枚举定义的 .cs 文件。谨慎使用预处理器指令可以解决 C# 和 C 之间的语法差异。
Example:
例子：
#if CSharp
namespace MyNamespace.SharedEnumerations
{
public
#endif
enum MyFirstEnumeration
{
Autodetect = -1,
Windows2000,
WindowsXP,
WindowsVista,
OSX,
Linux,
// Count must be last entry - is used to determine number of items in the enum
Count
};
#if CSharp
public
#endif
enum MessageLevel
{
None, // Message is ignored
InfoMessage, // Message is written to info port.
InfoWarning, // Message is written to info port and warning is issued
Popup // User is alerted to the message
};
#if CSharp
public delegate void MessageEventHandler(MessageLevel level, string message);
}
#endif
In your C# project, set a conditional compilation symbol "CSharp", make sure no such preprocessor definition exists in the C/C++ build environment.
在您的 C# 项目中，设置条件编译符号“CSharp”，确保 C/C++ 构建环境中不存在此类预处理器定义。
Note that this will only ensure both parts are syncronised at build time. If you mix-and-match binaries from different builds, the guarantee fails.
请注意，这只会确保两个部分在构建时同步。如果您混合匹配来自不同版本的二进制文件，则保证失败。
回答by doosik71
If you define strong enum in C++/CLI, enum codes will be included in the dll meta data. So, you can use enum codes in C#.
如果在 C++/CLI 中定义强枚举，则枚举代码将包含在 dll 元数据中。因此，您可以在 C# 中使用枚举代码。
public enum class eDeviceIntErrCodes: int
{
eDEVICEINT_ERR_FATAL = 0x10001
...
};
