一般情况C#调用MSVC编译出来的C/C++动态库，不会有太大问题，但是如果是mingw编译出来的呢？
答案是不确定的，得取决于你如何编译！
今天在这用一个例子实现C# 调用mingw编译出来的动态链接库
编译库：
qt的pro文件（因为qt用习惯了）
#-------------------------------------------------
#
# Project created by QtCreator 2019-08-30T11:05:01
#
#-------------------------------------------------
QT -= core gui
CONFIG += dll
TARGET = MyTestDll
TEMPLATE = lib
DEFINES += MYTESTDLL_LIBRARY
# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
mytestdll.cpp
HEADERS += \
mytestdll.h \
mytestdll_global.h
unix {
target.path = /usr/lib
INSTALLS += target
}
DISTFILES += \
lib.def
win32 {
win32-g++{
QMAKE_LFLAGS += -static
}
}
头文件
#ifndef MYTESTDLL_H
#define MYTESTDLL_H
#include "mytestdll_global.h"
extern"C" //此处代表按c风格编译,避免c++独特的编译方式,是的函数名发生改变
{
#define DLLMODLE_FUNCTIONTYPE __declspec(dllexport) //导出函数,声明dll的导出函数时,编译此处
//声明导出函数
DLLMODLE_FUNCTIONTYPE int add()
{
return 5;
}
#endif // MYTESTDLL_H
//def文件，这是关键，如果没有的话，msvc编译出来的C#可以调用，但mingw的不行
extern"C" //此处代表按c风格编译,避免c++独特的编译方式,是的函数名发生改变
{
//声明导出函数
int __stdcall add();
}
C#调用库的方法
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
[DllImport("MyTestDll.dll")]
public static extern int add();
//[DllImport("ParaConfig.dll")]
//public static extern int createConfigData();
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
/*
string src = "C:\\Users\\lenovo\\Desktop\\DataDll\\threeGrade.json";
string dst = "C:\\Users\\lenovo\\Desktop\\DataDll\\outputJson.json";
int bb = createConfigData();
* */
int bb = add();
}
}
}