通过Qt GUI将命令传递/提供给CMD

问题描述

我想要实现的目标（并且正在努力）基本上是通过QT Mainwindow应用程序将命令传递给CMD。

What I'm trying to achieve (And struggling with) is basically passing commands to CMD through my QT Mainwindow application.

我想要我的代码，首先运行CMD（最好是隐藏的）。我在这里使用QProcess是这样的：

I would like to have my code, first run CMD (preferably hidden). I used here QProcess like this:

（在我的 Mainwindow.cpp 文件中）

QString exePath = "C:/Windows/System32/cmd.exe";
      QProcess pro;
               pro.startDetached(exePath);
               pro.waitForStarted();

，一个明显的问题是您使用的是 static 方法 startDetached（） 和 blocking 函数 waitForFinished（） ... QProcess :: waitForStarted（） / waitForFinished（）不会捕获来自分离 QProcess的信号；
因此，您可以使用：

If you looked at this post, one apparent problem is that you are using the static method startDetached() with the blocking function waitForFinished() ... QProcess::waitForStarted()/waitForFinished() won't catch signals from detached QProcess;Thus you could use:

QProcess pro;
pro.start(exePath);
pro.waitForStarted(); // the correct is `waitForStarted()`

fstream 不清楚-对我来说-在您的描述中，您希望用户向您的进程发送 command ：
那么，例如，是：

What your trying to do with fstream is not clear - to me - while in your description, you want user to send a command to your process:then this could, for instance, be :

QByteArray user_cmd = QVariant(ui->lineEdit_command->text()).toByteArray();
pro.write(user_cmd);
pro.write("\n\r"); // press Enter to execute the command

因此您的代码可能是：

#include <QProcess>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
private slots:
    void readResult();
    void on_pushButton_clicked();
private:
    Ui::MainWindow *ui;
     QProcess* pro;
};

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QString>
#include <QDebug>


MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    connect(ui->pushButton, &QPushButton::clicked, this, &MainWindow::on_pushButton_clicked);
    QString exePath = "C:/Windows/System32";
    pro = new QProcess(parent);
    pro->setWorkingDirectory(exePath);
    pro->setReadChannel(QProcess::StandardOutput);
    connect(pro,&QProcess::readyReadStandardOutput, this, &MainWindow::readResult);
    pro->start("cmd.exe");
    if (!pro->waitForStarted())
    {
      qDebug() << "The process didnt start" << pro->error();
    }
}
void MainWindow::on_pushButton_clicked()
{
    if (ui->lineEdit_command->text().isEmpty())
        return;
    QByteArray cmd = QVariant(ui->lineEdit_command->text()).toByteArray();
     pro->write(cmd);
     pro->write("\n\r");
     ui->lineEdit_command->clear();

}
void MainWindow::readResult()
{
    while(pro->bytesAvailable()){
    QString dirout =  pro->readLine();
    qDebug() << dirout;
    }
}
MainWindow::~MainWindow()
{
    delete ui;
}

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