Qt中利用QProcess调用外部cmd.exe执行程序

最新推荐文章于 2025-07-07 23:27:42 发布

原创最新推荐文章于 2025-07-07 23:27:42 发布 · 6k 阅读

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文章标签：

#Qt #QProcess #C #cmd.exe

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1、#include "mainwindow.h"中

添加头文件：

#include <QProcess>

添加成员：

QProcess *myprocess;

添加槽函数声明：

void showCMDResult();
void showCMDState(QProcess::ProcessState state);
void showCMDError();
void showCMDFinished(int exitCode, QProcess::ExitStatus exitStatus);

2、mainwindow.cpp中

构造函数中实例化：

myprocess = new QProcess;

添加槽函数：

connect(myprocess, SIGNAL(readyRead()), this, SLOT(showCMDResult()));
connect(myprocess, SIGNAL(stateChanged(QProcess::ProcessState)),
        this, SLOT(showState(QProcess::ProcessState)));
connect(myprocess, SIGNAL(error(QProcess::ProcessError)),
        this, SLOT(showCMDError()));
connect(myprocess, SIGNAL(finished(int,QProcess::ExitStatus)),
        this, SLOT(showCMDFinished(int, QProcess::ExitStatus)));

实现槽函数：

void MainWindow::showCMDResult()
{
    QString strTemp=QString::fromLocal8Bit(myprocess->readAll());
    ui->textEdit->append(strTemp);
}

void MainWindow::showCMDState(QProcess::ProcessState state)
{
    if(state==QProcess::NotRunning)
        qDebug() << "Not Running";
    else if(state==QProcess::Starting) 
        qDebug() << "Starting";;
    else
        qDebug() << "Running";
}

void MainWindow::showCMDError()
{
    ui->textEdit->append(myprocess->errorString());
}

void MainWindow::showCMDFinished(int exitCode, QProcess::ExitStatus exitStatus)
{
    ui->textEdit->append(QString("启动结束：")
        .append("退出代码：").append(QString::number(exitCode))
        .append("退出状态：").append(QString::number((uint)exitStatus)));
}

3、启动cmd.exe

QStringList argument;
argument<<"/C"<<"python"<<ui->lineEdit_filepath->text()<<ui->lineEdit_inputpara->text();
myprocess->start("cmd.exe",argument);
ui->textEdit->append("启动cmd.exe");
// 等待进程启动
if (!myprocess->waitForStarted())
{
    ui->textEdit->append("启动失败");
    return;
}