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将C ++代码导出为DLL并使用C＃导入？

[英]Exporting C++ code as a DLL and import using C#?

原文 2011-11-30 21:27:33 2 2 c#/ c++/ windows/ dll

I have a program written in C++ with a main function that calls a bunch of other C++ classes/functions. 我有一个用C ++编写的程序，它的主要功能调用了许多其他C ++类/函数。

I am new to C++ (been a python programmer), so I'm wondering - What are the steps I need to follow to be able to export this as a DLL that is importable from a C# program? 我是C ++的新手（成为python程序员），所以我想知道-为了将其导出为可从C＃程序导入的DLL，我需要遵循哪些步骤？ Any suggestions? 有什么建议么？

2 个解决方案

If you want your C++ classes to be usable in a C# application you will need to use COM or target the CLR in your C++ program (ie, use C++/CLI). 如果希望C ++类在C＃应用程序中可用，则需要使用COM或在C ++程序中定位CLR（即，使用C ++ / CLI）。

If you simply have some functions in the C++ DLL that you want to call from C# that take POD type arguments then declare each function as extern "C" to avoid name mangling and use the DLLImport attribute to import the function. 如果您只想在C ++ DLL中有一些要从C＃调用的带有POD类型参数的函数，则将每个函数声明为extern "C"以避免名称修改，并使用DLLImport属性导入该函数。 PInvoke.net is a great resource here. PInvoke.net是一个很好的资源。

If you are only exporting plain functions, not classes, you can p/invoke them. 如果仅导出普通函数而不是类，则可以p /调用它们。 if ypu really need the classes, you have to write your project as a C++/CLI and reference it in your c# project like any other .NET assembly. 如果ypu确实需要这些类，则必须将您的项目编写为C ++ / CLI，并像其他任何.NET程序集一样在c＃项目中引用它。