c++本地动态连接库代码

c++本地动态连接库代码

 1 #pragma once
 2 #include "stdafx.h"
 3
 4 #ifdef PERSON_EXPORTS
 5 #define PERSON_API __declspec(dllexport)
 6 #else
 7 #define PERSON_API __declspec(dllimport)
 8 #endif
 9
10 class PERSON_API CPerson
11 {
12 public:
13     CPerson(LPCTSTR pszName, SYSTEMTIME birth);
14     unsigned int getAge(void);
15
16 private:
17     TCHAR _name[256];
18     SYSTEMTIME _birth;
19 };
20
21 #ifdef __cplusplus
22 extern "C"{
23 #endif
24     extern PERSON_API int nVal;
25     PERSON_API int nFunc(void);
26 #ifdef __cplusplus
27 }
28 #endif

Source　　

1// CPerson.cpp: 定义 DLL 应用程序的导出函数。

 1 // CPerson.cpp: 定义 DLL 应用程序的导出函数。
 2 //
 3
 4 #include "stdafx.h"
 5 #include "CPerson.h"
 6
 7 CPerson::CPerson(LPCTSTR pszName, SYSTEMTIME birth)
 8 {
 9     _birth = birth;
10     if (pszName != nullptr)
11         lstrcpy(_name, pszName);
12 }
13
14 unsigned int CPerson::getAge(void)
15 {
16     SYSTEMTIME st;
17     GetSystemTime(&st);
18     UINT age = st.wYear - _birth.wYear;
19     if (_birth.wMonth > st.wMonth ||
20         (_birth.wMonth == st.wMonth && _birth.wDay > st.wDay))
21     {
22         --age;
23     }
24
25     return age;
26 }
27
28 PERSON_API int nVal = 20180403;
29 PERSON_API int nFunc(void)
30 {
31     return 1816;
32 }

 2 //
 3
 4 #include "stdafx.h"
 5 #include "CPerson.h"
 6
 7 CPerson::CPerson(LPCTSTR pszName, SYSTEMTIME birth)
 8 {
 9     _birth = birth;
10     if (pszName != nullptr)
11         lstrcpy(_name, pszName);
12 }
13
14 unsigned int CPerson::getAge(void)
15 {
16     SYSTEMTIME st;
17     GetSystemTime(&st);
18     UINT age = st.wYear - _birth.wYear;
19     if (_birth.wMonth > st.wMonth ||
20         (_birth.wMonth == st.wMonth && _birth.wDay > st.wDay))
21     {
22         --age;
23     }
24
25     return age;
26 }
27
28 PERSON_API int nVal = 20180403;
29 PERSON_API int nFunc(void)
30 {
31     return 1816;
32 }

c++/cli包装代码

 1 #pragma once
 2 #include "CPerson.h"
 3
 4 using namespace System;
 5
 6 namespace Adapter
 7 {
 8     public ref class Person
 9     {
10     public:
11         Person(String ^name, DateTime birth);
12         virtual ~Person();
13
14         property unsigned int Age
15         {
16             unsigned int get();
17         }
18
19         static int CallnVal();
20         static int CallnFunc();
21
22     private:
23         Person(): _person(nullptr) { }
24         CPerson *_person;
25     };
26 }

Source

1 #include "stdafx.h"

 1 #include "stdafx.h"
 2 #include "Person.h"
 3 #include <vcclr.h>
 4
 5 Adapter::Person::Person(String ^ name, DateTime birth)
 6 {
 7     SYSTEMTIME st = { 0 };
 8     st.wYear = birth.Year;
 9     st.wMonth = birth.Month;
10     st.wDay = birth.Day;
11
12     pin_ptr<const TCHAR> psz = PtrToStringChars(name);
13
14     _person = new CPerson(psz, st);
15 }
16
17 Adapter::Person::~Person()
18 {
19     //System::Diagnostics::Debugger::Log(0, "Debug", "Person destructor.");
20     if (_person != nullptr)
21     {
22         CPerson *ptmp = _person;
23         _person = nullptr;
24         delete ptmp;
25     }
26 }
27
28 int Adapter::Person::CallnVal()
29 {
30     return nVal;
31 }
32
33 int Adapter::Person::CallnFunc()
34 {
35     return nFunc();
36 }
37
38 unsigned int Adapter::Person::Age::get()
39 {
40     return _person->getAge();
41 }

 2 #include "Person.h"
 3 #include <vcclr.h>
 4
 5 Adapter::Person::Person(String ^ name, DateTime birth)
 6 {
 7     SYSTEMTIME st = { 0 };
 8     st.wYear = birth.Year;
 9     st.wMonth = birth.Month;
10     st.wDay = birth.Day;
11
12     pin_ptr<const TCHAR> psz = PtrToStringChars(name);
13
14     _person = new CPerson(psz, st);
15 }
16
17 Adapter::Person::~Person()
18 {
19     //System::Diagnostics::Debugger::Log(0, "Debug", "Person destructor.");
20     if (_person != nullptr)
21     {
22         CPerson *ptmp = _person;
23         _person = nullptr;
24         delete ptmp;
25     }
26 }
27
28 int Adapter::Person::CallnVal()
29 {
30     return nVal;
31 }
32
33 int Adapter::Person::CallnFunc()
34 {
35     return nFunc();
36 }
37
38 unsigned int Adapter::Person::Age::get()
39 {
40     return _person->getAge();
41 }

经过验证使用Visual Studio 2017包含头文件<vcclr.h>会有报错，可以设置修改平台工具集来编译

通过CSharp调用

 1 using System;
 2 using Adapter;
 3
 4 namespace ConsoleApp
 5 {
 6     class Program
 7     {
 8         static void Main(string[] args)
 9         {
10             DateTime dt = DateTime.Now;
11             dt = dt.AddYears(-50);
12             Person p1 = new Person("c++", dt);
13             Console.WriteLine("调用本地c++ dll中的类: " + p1.Age);
14             Console.WriteLine("调用本地c++ dll中的变量： " + Person.CallnVal());
15             Console.WriteLine("调用本地c++ dll中的函数: " + Person.CallnFunc());
16
17             Console.ReadLine();
18         }
19     }
20 }

参考资料详情：

　　https://www.codeproject.com/Articles/35041/Mixing-NET-and-native-code

　　https://blog.csdn.net/ganzheyu/article/details/50154705

// CPerson.cpp: 定义 DLL 应用程序的导出函数。//
#include "stdafx.h"#include "CPerson.h"
CPerson::CPerson(LPCTSTR pszName, SYSTEMTIME birth){    _birth = birth;    if (pszName != nullptr)        lstrcpy(_name, pszName);}
unsigned int CPerson::getAge(void){    SYSTEMTIME st;    GetSystemTime(&st);    UINT age = st.wYear - _birth.wYear;    if (_birth.wMonth > st.wMonth ||        (_birth.wMonth == st.wMonth && _birth.wDay > st.wDay))    {        --age;    }
    return age;}
PERSON_API int nVal = 20180403;PERSON_API int nFunc(void){    return 1816;}