Open resource file

[beowulf]

I have a file in my resource, I was wondering if is possible to run invisibly (not show the form).

[MuldeR]

I don't understand your question.

If with "resource file" you mean a file that you have compiled into your binary using the "Qt Resource System":http://doc.qt.digia.com/qt/resources.html, it can be opened in a similar fashion to a local file by using QFile(":/filename.foo"). Alternatively, the data of the resource file can be accessed directly via memory pointer by using QResource(":/filename.foo").data(). With both ways the file won't be "visible" unless you make it visible.

[beowulf]

Yes, is Qt Resource System, but i don't want to read, i want to run.

[MuldeR]

Run WHAT ???

If the file is an executable you cannot run it from the memory directly! Instead you will have to save it to a local file (e.g. in TEMP folder), then use QProcess to run the executable from the local path...

@QString localPath = QString("%1/program.exe").arg(QDir::tempPath());

QFile localFile(localPath);
if(!localFile.open(QIODevice::WriteOnly))
{
qWarning("Oups!");
return;
}

QResource resourceFile(":\program.exe");
if(localFile.write(resourceFile.data(), resourceFile.size()) != resourceFile.size())
{
qWarning("Oups!");
return;
}
localFile.close();

QProcess::execute(localPath);@

[mkdh]

@MuldeR
Not work!
Error message: no match method.
I find resourceFile.data() is const uchar *, but write must use const uchar *....

        QFile file(myPath+"qqq.xxx");
        file.open(QIODevice::WriteOnly);
        //        QDataStream writer(file);
        QResource resourceFile(":/xxx/Resources/xxx/qqq.xxx");
        file.write(resourceFile.data(), resourceFile.size());
        file.close();

I am using Qt 5.4.

[raf924]

No nee to use the resource class, resource files can be accessed by QFile

QFile resourceFile(":/path/to/resource");

[mkdh]

This post is deleted!

[mkdh]

@raf924
I got this file with 0 byte.

How to fixed it?

       QFile file(myPath+"/qqq.xxx");
        file.open(QIODevice::WriteOnly);
        //QDataStream writer(file);
        QFile resourceFile(":/xxx/Resources/xxx/qqq.xxx");
        // QResource resourceFile(":/xxx/Resources/xxx/qqq.xxx");
        file.write(resourceFile.readAll());
        file.close();

In fact, I just want to set the default file for the beinning user.
When user install this app, then he can get those free file.

But I don't know how to set those code and files....

[raf924]

@mkdh You forgot to open the resource file.