how to use AutoCloseHandle in QFile base operation?

[Qt embedded developer]

i want to know how to use AutoCloseHandle flag of Qfile in below code ?

QFile file(QDir::homePath() + "/Runtime/"+ "NewFile.txt");

            if (!file.open(QIODevice::ReadWrite))
            {
            qDebug() << "file is not exist";
            qDebug()<< "Cannot open file for writing: "
                         << qPrintable(file.errorString());
            }
            else
            {
                QTextStream out(&file);
                out << secondsbetweenDateTime<< endl;
            }

[JonB]

@Qt-embedded-developer
Why are you interested at all in QFileDevice::AutoCloseHandle? Just for the sake of it? Since the docs state:

When opening a file by name, this flag is ignored as Qt always owns the file handle and must close it.

how is it relevant to your situation?

if (!file.open(QIODevice::ReadWrite))

As I posted in your previous thread, ReadWrite is likely to be the wrong choice here. Up to you whether you want to respect this or ignore it.

[Qt embedded developer]

@JonB can you tell me what i have to write in place of below

if (!file.open(QIODevice::ReadWrite))

Because as i want to create the file when file not exist.

My file is like simple file on home directory of linux .

I asked question because i want to explore purpose of QFileDevice::AutoCloseHandle .

[Bonnie]

This is only used when you open a file by an existing file handle or file descriptor.

bool QFile::open(FILE *fh, QIODevice::OpenMode mode, QFileDevice::FileHandleFlags handleFlags = DontCloseHandle)
bool QFile::open(int fd, QIODevice::OpenMode mode, QFileDevice::FileHandleFlags handleFlags = DontCloseHandle)