open a file

[aekilic]

Dear All

I have file in c:\windows\local files\temp\picture.jpg, I would like to open the file. How can I do it?

[spirit]

if you need just open the file then use QFile, if you need to show this image then use QPixmap.

[aekilic]

the problem is not only a image, we have word files, excel files, we could read the file, but we could not open it.

[spirit]

please, show code what we do.

[aekilic]

QFile *tmpFile = new QFile ( QString ( QDir::tempPath() + "/" + tmpFile->fileName() ) );
    if ( !tmpFile->open ( QIODevice::WriteOnly) )
    {
        return;
    }
    qint64 size = tmpFile->write ( ba1 );
    if ( size != -1 )
    {
      	tmpFile->setFileName(realname);
    	QProcess::startDetached  ( tmpFile->fileName() );
    }

QFile *tmpFile = new QFile ( QString ( QDir::tempPath() + "/" + tmpFile->fileName() ) );
    if ( !tmpFile->open ( QIODevice::WriteOnly) )
    {
        return;
    }
    qint64 size = tmpFile->write ( ba1 );
    if ( size != -1 )
    {
      	tmpFile->setFileName(realname);
    	QProcess::startDetached  ( tmpFile->fileName() );
    }

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After this it saves the file to temp folder but I would like to open the file after that.

[spirit]

if you cooment this line

...
 QProcess::startDetached  ( tmpFile->fileName() );
...

...
 QProcess::startDetached  ( tmpFile->fileName() );
...

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and then try to open this file, does it open?

[Kumosan]

What do you mean with 'open the file after that'? What you do is write it to disk and afterwards you try to start it as executable.

[aekilic]

if you cooment this line

...
 QProcess::startDetached  ( tmpFile->fileName() );
...

...
 QProcess::startDetached  ( tmpFile->fileName() );
...

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and then try to open this file, does it open?

Yes, I try to open the file, I mean like if it is a openoffice file I would like to start open office to see the file.

But what I think is QProcess::startDetached ( tmpFile->fileName() ); doesnt work...

[Kumosan]

But what I think is QProcess::startDetached ( tmpFile->fileName() ); doesnt work...

Of course not. If we take an open office file as example, you are trying to execute the .odf file with QProcess, not the .exe.

[aekilic]

ok then should I write,

QProcess::execute( tmpFile->fileName() );

QProcess::execute( tmpFile->fileName() );

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??

[spirit]

your file isn't executable. you need specify needed program and your file as an argument.
somethig like this will work

QProcess::execute("notepad.exe", QStringList() << "d:/phones.txt");

QProcess::execute("notepad.exe", QStringList() << "d:/phones.txt");

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[aekilic]

for the file, I never know what the user saves,

It could be pdf, odt, dwg? So I dont know the program, any way to do it withour writing the program.

[Kumosan]

For what os do you write the program? Windows? Linux?

[aekilic]

windows xp ...

[spirit]

then try to use ShellExecute or ShellExecuteEx.

[chaoticbob]

If you're trying to open files in their respective applications, you might want to take a look at
openUrl in the QDesktopServices class:

QDesktopServices::openUrl

QDesktopServices::openUrl

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[spirit]

If you're trying to open files in their respective applications, you might want to take a look at
openUrl in the QDesktopServices class:

QDesktopServices::openUrl

QDesktopServices::openUrl

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yep, it will work too.

[aekilic]

tried this

QUrl my_url;
     my_url = QUrl::fromLocalFile(tmpFile->fileName());
     QDesktopServices::openUrl(my_url);

QUrl my_url;
     my_url = QUrl::fromLocalFile(tmpFile->fileName());
     QDesktopServices::openUrl(my_url);

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didnt work...

[aekilic]

Dear all thank you very much, I have just understand I made a mistake for the QUrl

Thank you very much again...