Manage C++包装Native C++类的例子

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最新推荐文章于 2025-05-20 01:48:56 发布

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分类专栏： .net(C#/CLI/DLR) 文章标签： c++ byte wrapper class system string

本文链接：https://blog.youkuaiyun.com/begtostudy/article/details/6363345

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Native C++

   1:  #include

2:

   3:  class CPPClass

   4:  {

   5:  public:

   6:    CPPClass(void) {};

   7:  public:

   8:    ~CPPClass(void) {};

9:

  10:    void produceByteArray(unsigned char* array, int length)

  11:    {

  12:      printf("CPPClass: Producing %i elements/n", length);

  13:      for (int i=0; i
  
  

  
   
     14:      {

  
   
     15:        array[i] = i*2;

  
   
     16:      }

  
   
     17:    }

  
   
     18:  };

包装后的Managed C++

   1:  using namespace System;

   2:  #include "CPPClass.h"

3:

   4:  namespace SimpleInterop

   5:  {

   6:    public ref class ManagedWrapperClass

   7:    {

   8:    public:

   9:      ManagedWrapperClass(void) { _pCPPClass = new CPPClass(); };

10:

  11:      // Wrapper method for the produceByteArray C++ method

  12:      // array
   
   
    
    ^ represents a managed byte array

  13:      void produceByteArray(array<byte>^ data)

  14:      {

  15:        // The following line fixes the managed array to a pointer. This avoids

  16:        // that the address of the array is changed by the garbage collector.

  17:        pin_ptr<byte> p = &data[0];

  18:        _pCPPClass->produceByteArray(p, data->Length);

  19:      }

20:

  21:    private:

  22:      CPPClass* _pCPPClass;

  23:    };

  24:  }

在C#中使用

   1:  using System;

   2:  using System.Collections.Generic;

   3:  using System.Text;

4:

   5:  namespace SimpleInterop

   6:  {

   7:    class Program

   8:    {

   9:      static void Main(string[] args)

  10:      {

  11:        ManagedWrapperClass CPPClass = new ManagedWrapperClass();

12:

  13:        // Test the produceByteArray method

  14:        byte[] data = new byte[10];

  15:        CPPClass.produceByteArray(data);

  16:        foreach (byte element in data) { Console.WriteLine(element); }

17:

  18:        Console.WriteLine("Press return");

  19:        Console.Read();

  20:      }

  21:    }

  22:  }

原帖：http://blog.naiznoiz.com/2008/01/cc-interop-a-simple-example