checking files in all sub-directories

  • Hey guys! Give you a scenario . You have a folder A, inside the folder you ll have another three folders, the name of these three folder inside folder A are B,C and D. Now, Folder B and D is a empty folder, which means the folders B and D dont have anything inside the folder, but for folder C ,yes, its not empty, there is an another empty file called folder E which located inside folder C. Right now, i want to check the folder E in which folder , want to check either is in B,C or D. Let me make my question simpler, how do i check which files have the folder E in folder A?
    FYI, i have already implement some code for this scenario . Here the codes:

    void CheckForFiles_Form ::recursiveAddDir(QDir d, bool recursive)
        QDir::Filters df = QDir::Files | QDir::NoDotAndDotDot;
        if(recursive) df |= QDir::Dirs;
        QStringList qsl = d.entryList  (df,QDir::Name|QDir::DirsFirst);
        foreach (const QString &entry, qsl){
            QFileInfo fInfo(d,entry);
                QDir sd(fInfo.absoluteFilePath());
                if(**fInfo.completeSuffix()== "txt"**)
                               qDebug() << fInfo.filePath();
    void CheckForFiles_Form::on_pushButton_clicked()
        QDir r("C:/Users/USER/Desktop/FileA/");
        recursiveAddDir(r, true);

    Above codes can only look for extension of a file , eg: ..mp3, and *.txt . This is not what i want, what i wanted is to look for the name of the folder .not the extension. I tried modify the codes that i provided, what have i modified is instead of fInfo.completeSuffix()=="txt" , i changed to fInfo.completeBaseName()=="fileE". The modification that i made will give you no error when you compile and build, but, no result will display out when you try to execute this function . Some one here please guide me , i already done most of the implementation of this problem , right now i just need to do some modification in order to meet my requirement. thank you!

  • Qt Champions 2016

    You should check with qDebug what files it really finds
    fInfo.completeBaseName() should be it.
    So QDebug all you compare.
    also try

    I am not sure == compares as you think.

  • Lifetime Qt Champion


    Since you are looking for a folder, why not filter your entry list ask only for the Dirs ? Then it's a simple check with QStringList::contains.

  • @SGaist

    Hi, thanks for replying. I dont really understand the comment that you posted, perhaps you can give an example, so that i can have a clear picture. if(recursive) {df |= QDir::Dirs;} , isn't this line to ask only for dir? thank you.

  •  QString root = "C:/Users/USER/Desktop/FileA/";
        QDirIterator it(root,QStringList() << "fileE",QDir::Files,QDirIterator::Subdirectories);
            qDebug() <<;
            qDebug() << it.fileName();

    tried to list all the directories and perform the checking operation unto it. But , this only work with file extension. Initially, its was "*.txt" , but i changed to "fileE" , it will give no errors when you try to compile. However, it doesn't produce any result . I m really dont have clues to proceed anymore. All i want to list all subdirectories, perform a checking operation unto the sundiretories, and lastly return an absolute path for the result . Thank you

  • @QT_QT_QT
    Does there any file named fileE exist in any subfolders as you use QDir::Files as filter?

    QDirIterator(const QString &path, const QStringList &nameFilters, QDir::Filters filters = QDir::NoFilter, IteratorFlags flags = NoIteratorFlags) only finds any entries, that have exact matching if you put a string without wildcards into the QStringList. So if you do not have any fileE somewhere it will be empty.

    If you want to search for folders you should use QDir::Dirs for the filter parameter

  • Dear All, after hours of struggling . Finally i come out with a solution ! Feel free to take a look!
    Credit to @SGaist @mrjj @the_

    //This is the fliters
    QDir::Filters df = QDir::Dirs |QDir::NoDotAndDotDot;
        QDirIterator::IteratorFlag dff = QDirIterator::Subdirectories;
        QString root = "C:/Users/USER/Desktop/FileA/";
        QDirIterator it(root,df,dff);
            //performing checking operation
           //QString str = "fileE";
             QString str2 =;

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