可以从 C# 调用 C++ 代码吗？
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Possible to call C++ code from C#?
提问by
Is it possible to call C++ code, possibly compiled as a code library file (.dll), from within a .NET language such as C#?
是否可以从 C# 等 .NET 语言中调用 C++ 代码，可能编译为代码库文件 (.dll)？
Specifically, C++ code such as the RakNet networking library.
具体来说，C++ 代码，例如 RakNet 网络库。
采纳答案by Eclipse
One easy way to call into C++ is to create a wrapper assembly in C++/CLI. In C++/CLI you can call into unmanaged code as if you were writing native code, but you can call into C++/CLI code from C# as if it were written in C#. The language was basically designed with interop into existing libraries as its "killer app".
调用 C++ 的一种简单方法是在 C++/CLI 中创建包装程序集。在 C++/CLI 中，您可以像编写本机代码一样调用非托管代码，但您可以从 C# 调用 C++/CLI 代码，就像它是用 C# 编写的一样。该语言基本上被设计为与现有库互操作，作为它的“杀手级应用程序”。
For example - compile this with the /clr switch
例如 - 使用 /clr 开关编译它
#include "NativeType.h"
public ref class ManagedType
{
NativeType* NativePtr;
public:
ManagedType() : NativePtr(new NativeType()) {}
~ManagedType() { delete NativePtr; }
void ManagedMethod()
{ NativePtr->NativeMethod(); }
};
Then in C#, add a reference to your ManagedType assembly, and use it like so:
然后在 C# 中，添加对 ManagedType 程序集的引用，并像这样使用它：
ManagedType mt = new ManagedType();
mt.ManagedMethod();
Check out this blog postfor a more explained example.
查看此博客文章以获得更详细的示例。
回答by Mat Nadrofsky
Sure is. This articleis a good example of something you can do to get started on this.
当然是。这篇文章是一个很好的例子，你可以做些什么来开始这个。
We do this from C# on our Windows Mobile devices using P/Invoke.
我们在 Windows Mobile 设备上使用P/Invoke从 C# 执行此操作。
回答by Mehrdad Afshari
回答by Frank Schwieterman
The technology used to do this is called P/Invoke; you can search for articles on the subject. Note that it is for calling C from C#, not C++ so much. So you'll need to wrap your C++ code in a C wrapper that your DLL exports.
用于执行此操作的技术称为P/Invoke；您可以搜索有关该主题的文章。请注意，它用于从 C# 调用 C，而不是 C++。因此，您需要将 C++ 代码包装在 DLL 导出的 C 包装器中。
回答by Dana Holt
回答by plinth
P/Invoke is a nice technology, and it works fairly well, except for issues in loading the target DLL file. We've found that the best way to do things is to create a static library of native functions and link that into a Managed C++ (or C++/CLI) project that depends upon it.
P/Invoke 是一项不错的技术，它运行得相当好，除了加载目标 DLL 文件时出现问题。我们发现，最好的方法是创建一个本地函数的静态库，并将其链接到依赖它的托管 C++（或 C++/CLI）项目。
回答by Soumendra
Have you considered Apache Thrift?
你考虑过 Apache Thrift 吗？
It seems like a very very neat solution.
这似乎是一个非常非常巧妙的解决方案。
