加载dll失败

Qt系列文章目录

前言

加载dll失败，使用Dependencies.exe查看，感觉也没有缺失相关dll
在使用Qt中调用别人写的dll，一直加载失败。使用windeployqt.exe命令打包也总是失败

PS E:\osg\work\CARTDLL_demo_20220520\CallCartDll> D:\Qt\Qt5.12.9\5.12.9\msvc2017_64\bin\windeployqt.exe CallCartDll.exe
“CallCartDll.exe” does not exist.

PS E:\osg\work\CARTDLL_demo_20220520\CallCartDll> cd E:\osg\work\CARTDLL_demo_20220520\CallCartDll\debug
PS E:\osg\work\CARTDLL_demo_20220520\CallCartDll\debug> D:\Qt\Qt5.12.9\5.12.9\msvc2017_64\bin\windeployqt.exe CallCartDll.exe
E:\osg\work\CARTDLL_demo_20220520\CallCartDll\debug\CallCartDll.exe 64 bit, debug executable
E:\osg\work\CARTDLL_demo_20220520\CallCartDll\debug\CallCartDll.exe does not seem to be a Qt executable.
PS E:\osg\work\CARTDLL_demo_20220520\CallCartDll\debug>

二、解决办法

1.安装Anaconda3 版本-2021.05-Windows-x86_64
2.设置Anaconda3的环境变量

#include <QCoreApplication>
#include <iostream>
#include "windows.h"

using namespace std;
#pragma comment(lib,"CartDll.lib")
typedef double (*cartfun)(int *itype,int *katmod,int *ikaerosol,int *ikheight,float *iseah,float *ivis,float *irh,
                       float *wmintemp,float *wmaxtemp,float *avertrans,float *pathradiance, float *totalradiance);

int main(int argc, char *argv[])
{
    
    QCoreApplication a(argc, argv);

    HINSTANCE hlib=LoadLibrary(TEXT("CartDll.dll"));
    if(!hlib)
    {
    
        cout<<"open dll error!"<<endl;
    }
    else
    {
    
        cout<<"open dll sucess!"<<endl;
    }

    cartfun cart1=(cartfun)GetProcAddress(hlib,"cart");
    if(!cart1)
    {
    
       cout<<"load CART FUN add error!"<<endl;
    }
    else
    {
    
        cout<<"load CART FUN add sucess!"<<endl;
    }

    int iType = 3;          //计算模式
    int iKatmod = 22;        //大气模式
    int iKaerosol = 1;      //气溶胶类型
    int iKheight = 0;       //气溶胶高度模式
    float fSeah = 0.0;        //地表海拔高度
    float fVis = 34.0;       //能见度
    float fRh = 65.0;         //相对湿度
    float fWmintemp = 400.0;  //计算起始波数
    float fWmaxtemp = 40000.0;   //计算截止波数

    float fAvertrans;
    float fTotalradiance;
    float pathradiance;
    cart1(&iType,&iKatmod,&iKaerosol,&iKheight,&fSeah,&fVis,&fRh,&fWmintemp,&fWmaxtemp,&fAvertrans,&pathradiance,&fTotalradiance);

    cout<<" fAvertrans = "<<fAvertrans<<endl;

    cout<<" fTotalradiance = "<<fTotalradiance<<endl;

     cout<<" pathradiance = "<<pathradiance<<endl;



     cout << "Hello World!" << endl;

     std::system("pause");

    return a.exec();
}

总结

原来别人写的dll中有用到python相关依赖包，所以要把Anaconda3的路径配置到环境变量中