C＃非托管DLL在C ++中导出/导入 [英] C# unmanaged DLL Export / Import in C++
问题描述
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我在C＃中有以下代码:(我使用R.Giesecke Dllexport模板创建一个非托管的使用C＃的Dll ......它创建了一个带有（托管）C＃的.lib和.dll文件。
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I have following Code in C#: (I used R.Giesecke Dllexport Template to create a unmanaged Dll with C#... it creates me a ".lib" and ".dll" file with (managed) C# )
//UnmanagedExports.cs
using System;
using System.Collections.Generic;
using System.Text;
using RGiesecke.DllExport;
namespace AddDll
{
class MyAddDll
{
[DllExport("Add", CallingConvention = System.Runtime.InteropServices.CallingConvention.StdCall)]
public static double Add(double a, double b)
{
return a + b;
}
}
}
C＃Dll代码运行良好且没有错误，并为我创建了一个AddDll.lib和AddDll.dll文件。
我想用C ++导入这个Dll：
The C# Dll Code runs well without errors and creats me a AddDll.lib and AddDll.dll file.
I would like to import this Dll in C++:
//CallAdd.h
#pragma once
#define DllImport __declspec(dllimport)
namespace AddDll
{
class MyAddDll
{
public:
static DllImport double Add(double a, double b);
};
}
// CallAdd.cpp
#include "stdafx.h"
#include"CallAdd.h"
#include <iostream>
using namespace std;
int main()
{
double a = 4.5;
double b = 5.5;
cout << "a + b = " << AddDll::MyAddDll::Add(a, b) << endl;
system("pause");
return 0;
}
我有以下错误：
I've got following errors:
Warning 1 Platform is AnyCpu, creating binaries for each CPU platform in a separate subfolder...<br />
<br />
Error 2 error LNK2019: unresolved external symbol "__declspec(dllimport) public: static double __cdecl AddDll::MyAddDll::Add(double,double)" (__imp_?Add@MyAddDll@AddDll@@SANNN@Z) referenced in function _main<br />
<br />
Error 3 error LNK1120: 1 unresolved externals
在Visual Studio中，我在C ++控制台应用程序属性下执行了以下操作：
- 在共同属性中 - >框架和参考。添加AddDll项目参考。
- 在配置属性中 - >链接器 - >输入。附加依赖项AddDll.lib
- 在配置属性中 - >链接器 - >一般。其他库目录，添加
目录，其中AddDll.lib和AddDll.dll位于
任何人都可以帮我消除错误吗？ br />
提前Thx !!
In Visual Studio I did following under my C++ Console Application Properties:
- In Common Properties ‐> Framework and References. Add AddDll Project reference.
- In Configuration Properties ‐> Linker ‐> Input. Additional Dependencies AddDll.lib
- In Configuration Properties ‐> Linker ‐> General. Additional Library Directories, add
directory where AddDll.lib and AddDll.dll are located
Can anyone help me to eliminate the errors?
Thx in advance!!
推荐答案
你需要为同一个CPU构建C＃-dll你的C ++项目。 ：-O
you need to build the C#-dll for the same CPU as your C++ project. :-O
你有没有检查过这个
从非托管C ++ EXE中使用托管C＃DLL - 无法启动CLR主机 [ ^ ]
-praveen
have you checked this
Consume Managed C# DLL from Unmanaged C++ EXE - Cannot start the CLR host[^]
-praveen
您也可以将C＃代码编译为普通（.NET）代码，并将C ++代码编译为C ++ / CLI。这可以在同一文件中使用.NET和非托管代码。如果您需要在.NET和非托管C ++代码之间进行分离，您还可以在C ++ / CLI中编写一个包装器DLL来连接2。
You could also just compile your C# code as normal (.NET) code, and compile your C++ code as C++/CLI. That can use both .NET and unmanaged code in the same files. If you need separation between .NET and the unmanaged C++ code, you could also write a wrapper DLL in C++/CLI to interface between the 2.
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