加载中…VS2010里C#调用C++ dll文件(数字及字符串传参)
(2012-07-18 18:23:26)
标签：
vs2010cdll接口杂谈 |
分类： 学习 |
查了一些资料，貌似说.net 3.5 和.net4.0调用c++
dll的方式不用，我没试验过，一直用的VS2010，如果以下方法有人不适用，可能有这方便原因。
return x+y;
class Program
{
static void Main(string[] args)
{
Console.WriteLine("result: " + test.add(-12, 3).ToString());
string a =
"Hola";
string b =
"Jose";
IntPtr p =
test.Suma(a, b);
string c =
Marshal.PtrToStringAnsi(p);
Marshal.FreeHGlobal(p);
Console.WriteLine(c);
Console.ReadLine();
}
}
class test
{
[DllImport("TestDLL.dll", CallingConvention =
CallingConvention.Cdecl)]
public static extern int add(int i, int
j);
[DllImport("TestDll.dll", CallingConvention =
CallingConvention.Cdecl)]
public static extern System.IntPtr Suma(string
a, string b);
}
C++部分
stdafx.h:
#include "targetver.h"
#define WIN32_LEAN_AND_MEAN
// Exclude rarely-used stuff
from Windows headers
// Windows Header Files:
#include <windows.h>
// TODO: reference additional headers your program requires
here
#ifndef LIB_H
#define LIB_H
extern "C" int _declspec(dllexport)add(int x,int y);
// 声明为C编译、链接方式的外部函数
extern "C" _declspec(dllexport) char*
Suma(char* a, char* b);
#endif
TestDLL.cpp
#include "stdafx.h"
int add(int x,int y)
{
}
char* Suma(char* a, char* b)
{
char* result = (char*)LocalAlloc(LPTR, strlen(a) + strlen(b) +
1);
strcat(result, a);
strcat(result, b);
return result;
}
C#部分：
program.cs
之前在调试的时候虽然结果运行正确，但一直出现错误提示，
“Managed Debugging Assistant 'PInvokeStackImbalance' has
detected a problem in...."
在DLLImport中加入CallingConvention =
CallingConvention.Cdecl就ok了
KEY WORDS: either
use on
your C++ function or declare on
your
__stdcall CallingConvention
= CallingConvention.Cdecl DllImport.
ok，问题解决了
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