I would like to open and read a text file at program launch, using Qt

pditty8811

I would like to open a text file at program launch, using Qt. I would like the text to appear in the text field which is called textEdit.

It is a simple notepad program that I am changing into an app I want to do other special things.

How do I input a text file, say "text.txt" into my textEdit widget upon program launch? All of the text file.

Writing with C++.

Thanks.

p3c0

Hi,

You can open and read the file from your QMainWindow or QDialog's constructor.
Try the following code:
@ #include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFile>
#include <QTextStream>

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    loadFile&#40;&#41;;
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::loadFile&#40;&#41;
{
    QFile file&#40;":/read.txt"&#41;; //If present in Resource

// QFile file("D:/Test/read.txt"); //If present on system
file.open(QIODevice::ReadOnly);

    QTextStream stream(&file);
    QString line = stream.readAll();
    file.close();
 
    ui->textEdit->setText(line);
}

@

pditty8811

Thank you. That did it.