QT Debugging QFile::remove() Windows 10 MSVS 2019-CodePudding

I am working on a QT application that has to communicate with a few Windows-utilities. The result of these utilities are a couple of “production-files” that should be listed in a “filenames-txt-file” for further use.

The production of such a “filenames-txt-file” with the list of “production-files” is done with QT using QFileInfo.
Sometimes an old “filenames-txt-file” already exists in the working-directory and should be removed before it can be created with the new results.

Here is the problem:
QFile::remove("somefile") does not work while debugging.
It works fine, when I run the Exe in the debug-folder outside MSVS,
and it works fine running the release version.

While debugging, I get this messages:

if (QFile::exists(filenameFull)) {
    QFile f (filenameFull);     
    qDebug() << f.remove(filenameFull);     // returns false
    qDebug() << f.errorString();            // returns “unknown error”
}

I elevated Microsoft Visual Studio 2019 to run as administrator.
I did set the UAC execution level to “highestAvailable”.
Is anything else needed to make this code working while debugging?

CodePudding user response：

It may be unrelated but instead f.remove(filenameFull) you can just use f.remove() or QFile::remove(filenameFull).

QFile::remove on windows uses winapi function DeleteFileW(("\\\\?\\" QDir::toNativeSeparators(filenameFull)).utf16()) where "\\?\" is used to avoid MAX_PATH limitation. Try calling this function directly and analyze result.

CodePudding user response：

You are calling static function, QFile::remove(QString filename), so f does not see the error. So try this:

if (QFile::exists(filenameFull)) {
    QFile f (filenameFull);
    qDebug() << f.exists();
    qDebug() << f.remove();      
    qDebug() << f.errorString();
}

That should solve the part about not getting error string.