How to delete a file within thread using

phamvanan

I try to delete a file, but i get error it's using by other progressing. Specially, I use a thread to copy content file but during copying, i want to crop down copy progressing and delete the file not intact.
How to disconect that progress to file deleted.

Thanks

raven-worx

if the file is opened by your application you need to make sure that you call QFile::close() on it.
If the file is locked by another process/application there is nothing you can/should do.

phamvanan

I try to use:
@QFile("C:/abc.mp3").close();
QFile("C:/abc.mp3").remove();@
but not working.
Get a error:
@error: C2352: 'QFile::close' : illegal call of non-static member function@

raven-worx

i don't believe that this is the actual code you are using!
Why don't you post the correct code when you expect us to help you?!

I assume you call a member of type QFile out of a static method, right?

phamvanan

I'm really sorry you,
I get error above when i use:
@QFile::close();@
in my class. So, I try other away,
@ QFile("C:/abc.mp3").close();
QFile("C:/abc.mp3").remove();
@
But also file not deleted.

phamvanan

That right,
@void MainWindow::on_pushButton_clicked()
{
QFile::close();
QFile("c:/des/1 (1).iso").close();
this->destination->remove("c:/des/1 (1).iso");
}@

destination is variable QDir type

raven-worx

QFile::close() is not a static function so remove this line and use it like in line 4.
@
QFile file("c:/des/1 (1).iso");
file.close();
qDebug() << "QFile::remove()" << file.remove();
qDebug() << "QFile::errorString()" << file.errorString();
@
What are the outputs of this code?

phamvanan

Hi, outputs as below:
@QFile::remove() false
QFile::errorString() "The process cannot access the file because it is being used by another process.@

raven-worx

you can use "ProcessExplorer":http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx and check which process is holding the handle to that file.
If it's your application check your code again where you "open":http://qt-project.org/doc/qt-4.8/qfile.html#open it and make sure you close it properly. If it's another application there is nothing you can do...

phamvanan

Thank you very much,
I understand you said.
Let me see again.
By the way, Have you a simple example about postEvent() function to me clear it?
An.

raven-worx

[quote author="phamvanan" date="1371204058"]
By the way, Have you a simple example about postEvent() function to me clear it?[/quote]
"Here":http://doc.qt.digia.com/qq/qq11-events.html#syntheticevents you go.

phamvanan

I have a problem. I have a two objects, one is Copier object and else MainWindow Object,
I want create postEvent at Copier class to MainWindow class.
How to do that? At MainWindow how to get that event.
Addition, How to send a data with postEvent function?
Thanks.

raven-worx

open the link i've posted before and just scroll down a little bit.... :/