Read text file in textedit Qt C++

Question

I have this text file:

Name 1      Email 1
Name 2      Email 2
Name 3      Email 3
Name 4      Email 4
Name 5      Email 5

This is a list of employees with their emails. I want to make a list in a dialog window with their names displayed there. I thought this was a good way to print out the text file on the dialog window but it isn't working.

employees_dialog.cpp

#include "employees_dialog.h"
#include "ui_employees_dialog.h"
#include <QtCore/QFile>
#include <QtCore/QTextStream>


employees_dialog::employees_dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::employees_dialog)
{
    ui->setupUi(this);
    getTextFile();
}

employees_dialog::~employees_dialog()
{
    delete ui;
}

void employees_dialog::getTextFile()
{
    QFile myFile(":/employees.txt");
    myFile.open(QIODevice::ReadOnly);
    QTextStream textStream(&myFile);
    QString line = textStream.readAll();
    myFile.close();
    ui->textEdit->setPlainText(line);
}

This is the header file.

#ifndef EMPLOYEES_DIALOG_H
#define EMPLOYEES_DIALOG_H

#include <QDialog>

namespace Ui {
    class employees_dialog;
}

class employees_dialog : public QDialog
{
    Q_OBJECT

public:
    explicit employees_dialog(QWidget *parent = 0);
    ~employees_dialog();

private slots:

private:
    Ui::employees_dialog *ui;
    void getTextFile();
};

#endif // EMPLOYEES_DIALOG_H

So the textEdit in the UI should display the text file. But it's just blank white. I have the file in Qt Resources File. The debugger doesn't give any errors the application itself is just working fine but the text won't appear in the textEdit.

By the way, I'm new to Qt.

I would use a debugger. Set a breakpoint on getTextFile() and examine the contents of line. I suspect the QFile is not being open because of a problem with the qrc file. — drescherjm, Nov 14 '13 at 09:59
if(QFile::exists(true)) { qDebug("File doesnt exists or wont open"); } — SjonTeflon, Nov 14 '13 at 10:04
this doesnt work it says 'F:\Scripts\Berichtencentrumemployees_dialog.cpp:30: error: C2665: 'QFile::exists' : none of the 2 overloads could convert all the argument types c:\qt\qt5.1.1\5.1.1\msvc2012_64\include\qtcore\qfile.h(108): could be 'bool QFile::exists(const QString &)' while trying to match the argument list '(bool)'' — SjonTeflon, Nov 14 '13 at 10:04
@SvenWeerdenburg just `myFile.exists()` instead of `QFile::exists(true)` — Evgeny Timoshenko, Nov 14 '13 at 10:05
Oke the file doesn't exists what did do wrong? I did make a qrc file — SjonTeflon, Nov 14 '13 at 10:08
@SvenWeerdenburg Did you have a look at http://stackoverflow.com/questions/15989149/cannot-open-resource-file ? — Evgeny Timoshenko, Nov 14 '13 at 10:09
Even after following all these steps. How can I solve this problem to open the file? Or should I upload the Project? — SjonTeflon, Nov 14 '13 at 15:50
@SvenWeerdenburg could you show your `qrc` file? Did not you forget about resource prefix in `QFile` constructor's argument? — Evgeny Timoshenko, Nov 16 '13 at 10:28
@SvenWeerdenburg Does your `pro` file contain string like `RESOURCES += YourResourceFilename.qrc`? — Evgeny Timoshenko, Nov 16 '13 at 16:11

score 0 · Answer 1 · edited Apr 03 '14 at 20:04

0

use this:

QFile file( "myfile.txt" );

if ( !file.exists() )
{
    qDebug()<<"doesn't exist the file";
}

edited Apr 03 '14 at 20:04

Kiril Kirov

37,467
22
115
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answered Mar 24 '14 at 23:05

Jefferson Rondan

103
1
10

Read text file in textedit Qt C++

1 Answers1