Get filename from QFile?

Question

eg:

QFile f("/home/umanga/Desktop/image.jpg");

How I get only the filename - "image.jpg"?

score 113 · Accepted Answer · edited Feb 12 '16 at 10:59

113

Use a QFileInfo to strip out the path (if any):

QFileInfo fileInfo(f.fileName());
QString filename(fileInfo.fileName());

edited Feb 12 '16 at 10:59

Tomáš Zato

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answered Sep 06 '10 at 03:50

Arnold Spence

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You can make this even shorter by giving the QFile as a parameter to the QFileInfo constructor: `QFileInfo fileInfo(f);` – Sep 06 '10 at 04:44
4

If the file does not exist this will fail. – bat_ventzi Jun 22 '15 at 12:47

score 16 · Answer 2 · edited Jun 18 '14 at 12:48

16

One approach, not necessarily the best: from a QFile, you can get the file specification with QFile::fileName():

QFile f("/home/umanga/Desktop/image.jpg");
QString str = f.fileName();

then you can just use the string features like QString::split:

QStringList parts = str.split("/");
QString lastBit = parts.at(parts.size()-1);

edited Jun 18 '14 at 12:48

Lion King

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answered Sep 06 '10 at 03:51

paxdiablo

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QString section is more situable: – Kamil Klimek Sep 08 '10 at 07:43
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QString lastBit = str.section("/", -1, -1); – Kamil Klimek Sep 08 '10 at 07:52
@Kamil, you should leave that as an answer rather than a comment, then I'll upvote it :-) – paxdiablo Sep 08 '10 at 08:02
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@bat_ventzi, why do you believe it won't work for something like `../../a/b/c`? That would still split correctly and give you `c`. – paxdiablo Jun 23 '15 at 07:20
Actually you are right @paxdiablo. I don't know why I've commented that way. :) Should I remove the comment? – bat_ventzi Jun 23 '15 at 14:13
@bat_ventzi, it's up to you. I'll keep an eye on it for a while and, if you do, I'll also delete mine. Or you can leave it there as commentary, I'm sure SO won't miss a few bytes here and there ;-) – paxdiablo Jun 23 '15 at 14:21
The `split` approach relies on the path separator being `/`. On some systems this won't work. – Ruslan Apr 16 '19 at 19:00

score 11 · Answer 3 · answered Jan 21 '14 at 17:27

11

just in addition: to seperate filename and file path having QFile f

QString path = f.fileName();
QString file = path.section("/",-1,-1);
QString dir = path.section("/",0,-2);

you don't need to create an additional fileInfo.

answered Jan 21 '14 at 17:27

refuzee

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score 1 · Answer 4 · answered Dec 12 '19 at 14:34

1

I use this:

bool utes::pathsplit(QString source,QString *path,QString *filename)
{
QString fn;
int index;
    if (source == "") return(false);
    fn = source.section("/", -1, -1);
    if (fn == "") return(false);
    index = source.indexOf(fn);
    if (index == -1) return(false);
    *path = source.mid(0,index);
    *filename = fn;
    return(true);
}

answered Dec 12 '19 at 14:34

fyngyrz

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Smart, but for me it seems like a long U turn. +1 Because i had to search for the meaning of **QString::section()** and **QString::mid()**, i didn't knew about them – Eyad Mohammed Osama Apr 08 '20 at 01:45

Get filename from QFile?

4 Answers4