QT_防止程序重复运行

原创已于 2025-11-03 09:09:57 修改 · 106 阅读

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#qt #开发语言

于 2025-10-27 14:34:38 首次发布

#include "DataControlCenter.h"
#include <QtWidgets/QApplication>
#include <windows.h>
#include <tlhelp32.h>
#include <QMessageBox>
 
bool isRuning(QString strName) {
    /*说明:判断进程是否已经存在运行实例依赖windowsAPI*/int i = 0;
    PROCESSENTRY32 pe32;
    pe32.dwSize = sizeof(pe32);
    HANDLE hProcesssnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    if (hProcesssnap == INVALID_HANDLE_VALUE)
    {
        i += 0;
    }
    bool bMore = ::Process32First(hProcesssnap, &pe32); 
    while (bMore)
    {
        QString strProcessName = QString::fromWCharArray(pe32.szExeFile);
        if (strProcessName == strName)
        {
            i++;
        }
        bMore = ::Process32Next(hProcesssnap, &pe32);
    }
    return(i > 1) ? true : false;//大于1，排除自身
}
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    if (isRuning(a.applicationFilePath().split("/").last())) {
        QMessageBox::about(NULL, "错误", "请勿重复运行本程序！");
        return -1;
    }

    DataControlCenter w;
    w.show();
    return a.exec();
}