Creating a file in c:\

phil63

Hi,

With the code below we ceate a file in the debug file.
How can I create the file in C:\ ?
Thanks in advance for your help.

@//creating a file named dossier donnes- if it doesn't exist
QDir lDir;
if (not lDir.exists("dossier donnes")) lDir.mkdir("dossier donnes");
@

JKSH

Use a QFile to create files. Open the file, then write your data, then close the file. See http://qt-project.org/doc/qt-5.0/qtcore/qfile.html for more details

@
QFile output("myfile.txt");

bool ok = output.open(QFile::WriteOnly|QFile::Text);
if (ok)
{
output.write("Debug text");
output.close();
}
else
{
qDebug("Could not open file!");
}
@

phil63

Hi,
Thank you for your reply.
I badly formulated my question. Sorry about it.
But my question was not 'how to create a file' but 'how to create a directory file' at a certain location'
debug is a directory file created by QTCreator when compiling a file . It contains beside others the .exe program.
'dossier donnes' is a directory file I want to create in C:\ .
And in this directory file (dossier donnes) I want to create in a next step, a txt file.

koahnig

The constructor allows you to provide a starting directory, "see QDir.":http://qt-project.org/doc/qt-5.0/qtcore/qdir.html#QDir-2 Since you did not specify a string it assigns an empty one. I am not sure where this points, but you know already where to start, so
@
//creating a file named dossier donnes- if it doesn't exist
QDir lDir ( "c:/" );
if (not lDir.exists("dossier donnes")) lDir.mkdir("dossier donnes");
@
should work.

Alternatively, you may use "mkpath":http://qt-project.org/doc/qt-5.0/qtcore/qdir.html#mkpath which allows to create cascading directories at once.

koahnig

Sorry, just saw the "not" in the if statement, what compile language are you using?
In C++ it would be

@
//creating a file named dossier donnes- if it doesn't exist
QDir lDir ( "c:/" );
if ( ! lDir.exists("dossier donnes")) lDir.mkdir("dossier donnes");
@

or

@
//creating a file named dossier donnes- if it doesn't exist
QDir lDir ( "c:/" );
if ( ! lDir.exists("c:/dossier donnes/dossier donnes")) lDir.mkpath("c:/dossier donnes/dossier donnes");
@

Note: you may use exists for absolute path already.

phil63

Thank you for your help.