Can QDir filter by filename length ?

sonichy

Custom filter first.

void QDir::setFilter(QDir::Filters filters)

SabarishR

No, QDir itself can’t filter files by filename length directly.

QDir only supports basic name filters (like wildcards), sorting, and attribute-based filters (files, dirs, hidden, etc.). It doesn’t provide filtering based on properties like string length.

The usual way to handle this is to get the file list first and then filter it manually. For example:

QDir dir("your/path");
QStringList files = dir.entryList(QDir::Files);

QStringList filtered;
for (const QString &file : files) {
    if (file.length() == 10) { // or whatever length you need
        filtered.append(file);
    }
}

If you need more file details, you can also use entryInfoList() and work with QFileInfo.

So in short: not built-in, but easy to implement with a simple loop 👍

SimonSchroeder

You could use QDir::setNameFilters (https://doc.qt.io/qt-6/qdir.html#setNameFilters). The documentation mentions that you can use * and ? wildcards. If you don't know this: ? filters exactly one character. So, to filter for a specific length, just use that number of question marks as name filter.