C # indirectly calls native C + + DLLs using clr/c++ DLLs

C # indirectly calls native C + + DLLs using clr/c++ DLLs

Development Environment: Win 7 VS2010

Summary: the EXE for C # uses clr/c++ to indirectly invoke native C + + Dlls.

First step: Create a C # console application project-named "ConsoleApplication1".

Step two: Create a clr/c++ project, right-click on "ConsoleApplication1" above "solution ' ConsoleApplication1 '"-->add-->newproject--> Clr-->class Library---name "netcpp".

Step three: Create a native C + + project, ditto, Right-click-->add-newproject-->win32-->win32 Project

--name "nativecpp"-->next--> Select "DLL"-->export symbols.

To create three projects above, start writing code and setting up the Environment:

Fourth step: open "NativeCpp.h" in which some member functions and variables are added;

#defineNativecpp_api __declspec(dllexport)

This class is exported from the NativeCpp.dll

class nativecpp_api cnativecpp {

public :

Cnativecpp (void);

Todo:add Your methods Here.

int Geta ()

{

Return 20;

}

};

Fifth step: refer to Nativecpp DLL in Netcpp project;

Right-click Netcpp Engineering-->properties

Sixth step: Open the Clr/c++ project "netcpp.h ", Adding #include   "NativeCpp.h"

#include  < Span style= "color: #a31515; font-family:consolas; font-size:small; " > "NativeCpp.h"

using namespace System;

namespace netcpp {

public ref class Class1

{public:

int Getb ()

{

Cnativecpp a;

return A.geta ();

}

};

}

Seventh Step: Right-click ConsoleApplication1 Project References-->add reference-->projects--> Select "netcpp"

then copy the DLL generated by native C + + into the bin\\debug\\ directory of the C # project . (if you want to dynamically update native C + + DLLs after modifying the nativec++ code , you need to set them in the properties of the C # project: "propertiesàBuild Eventsà Post-build event Command line: write command: copy $ (solutiondir) debug\nativecpp.dll $ (TargetDir) ) /c7>

Eighth Step: Open ConsoleApplication1 engineering program.cs.

using System;

using System.Collections.Generic;

using system.linq;

using system.text;

namespace ConsoleApplication1

{

class program

{

Static void Main (string[] Args)

{

Netcpp. Class1 cl = New netcpp. Class1 ();

Console . WriteLine ("geta ()" + c1.getb (). ToString ());

Console . Read ();

}

}

}

Original Address: http://blog.sina.com.cn/s/blog_a50d2d7401018rxr.html

C # indirectly calls native C + + DLLs using clr/c++ DLLs