Get the file information in Qt

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Article Metadata

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Tested with

Devices(s): Creator IDE V 4.5 and Emulator

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Compatibility

Platform(s): S60 3rd Edition FP1, S60 3rd Edition FP2, S60 5th Edition

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Article

Keywords: QFileInfo

Created: mind_freak (10 Jun 2009)

Last edited: hamishwillee (11 Oct 2012)

Overview

This article shows how to use QFileInfo to get name and modification information about a file in the file system. QFileInfo objects are used to hold information about files and directories.

The method used in the case are given below :

• fileName() : Returns the name of the file, excluding the path.
• lastModified() :Returns the date and time when the file was last modified.
• suffix() : Returns the suffix of the file.The suffix consists of all characters in the file after (but not including) the last '.'.

Preconditions

• Download and install the Qt SDK.

Property

• Returns the canonical path including the file name, i.e. an absolute path without symbolic links or redundant "." or ".." elements.

str=Info->canonicalFilePath ();

• Returns the complete base name of the file without the path.

QFileInfo fi("/tmp/archive.tar.gz");
QString base = fi.completeBaseName();  // base = "archive.tar"

Source File

Main.cpp

#include <QtGui/QApplication>
#include "fileinfo.h"
#include<QFileInfo>
#include<QWidget>
#include<QLabel>
#include<QString>
#include<QVBoxLayout>
#include<QDateTime>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QWidget *win=new QWidget();
    QDateTime time;
    QFileInfo info("C://demos//launcher//install.txt");
    QString str=info.fileName();
    time=info.lastModified();
    QString str1;
    str1=time.toString();
    QString ext = info.suffix();
    QLabel *lbl=new QLabel(str);
    QLabel *lbl1=new QLabel(str1);
    QLabel *lbl2=new QLabel(ext);
    QVBoxLayout *lay=new QVBoxLayout();
    lay->addWidget(lbl);// Name of file "Intall.txt"
    lay->addWidget(lbl1);//Last Modified Date
    lay->addWidget(lbl2);//File Extension
    win->setLayout(lay);
    win->show();
    return a.exec();
}

Screen shot

Creator IDE

Author - User:Mind freak