Check if file exists Qt

RIVOPICO

hi i tried many ways but lately take me problems? some working example. sorry again..

? Offline

Hi!
There are several ways to do that. One is using [static] bool QFile::exists(const QString &fileName), e.g.:

qDebug() << QFile::exists("/home/pw/docs/file.txt");

Pradeep Kumar

Hi,

You can also use QFileInfo Class to check the existance of file.

Sample code.

QString fileName("./sample.txt");
QFile file(fileName);
if(QFileInfo::exists(fileName))
{
    qDebug () << "file exists" << endl;
    file.open(QIODevice::ReadWrite | QIODevice::Text);
    QString data =  file.readAll();
    qDebug () << "data in file:" << data << endl;
    qDebug()<<"file already created"<<endl;
    file.close();
}
else
{
    qDebug () << "file does not exists" << endl;
    file.open(QIODevice::ReadWrite | QIODevice::Text);
    file.write("Qt Programming");
    qDebug()<<"file created"<<endl;
    file.close();
}

Checks files exists, if not exists, file gets created and data is written to the file.
If file exists read the data from the file.

Thanks,

Pradeep Kumar

As @Wieland said many ways to check

There are several ways to do that. One is using [static] bool QFile::exists(const QString &fileName), e.g.:
qDebug() << QFile::exists("/home/pw/docs/file.txt");

QString fileName("./sample.txt");
QFile file(fileName);
qDebug () << file.exists();

exists() method with parameter and without parameter.

Thanks,

? Offline

Another way:

qDebug() << QDir("/home/pw/docs").exists("file.txt");

Pradeep Kumar

@Wieland said in Check if file exists Qt:

Another way:

qDebug() << QDir("/home/pw/docs").exists("file.txt");

Nice Info.