returning empty std::string when converting a QString with a path to an std::string using toStdString

[Christian Ehrlicher]

Please don't pictures but text - so we can try out the code directly.

You forgot to flush the output buffer -> see std::endl or std::flush

[UbiMiles]

@Christian-Ehrlicher the text is recieved from QML from a FolderDialog
then converted from URL to QString

[Christian Ehrlicher]

@UbiMiles Did you actually read my answer on why it does not print something?

[UbiMiles]

@Christian-Ehrlicher as for flushing I am not intending to output the string but using it with an external SDK, the bug caused a weird exception in the disassembler
and I found out it is because the string is empty

[Christian Ehrlicher]

@UbiMiles The string is not empty. Please provide a minimal, compilable example of your real code. Your code above does not output anything because (third time) you forgot to flush the output buffer.

[UbiMiles]

@UbiMiles oh
I do see now , my bad.. pardons

[UbiMiles]

@Christian-Ehrlicher
when passing the standard library string to a function it causes a runtime error in the disassembler
do you have any idea what may be causing such issue

[Christian Ehrlicher]

@UbiMiles said in returning empty std::string when converting a QString with a path to an std::string using toStdString:

when passing the standard library string to a function it causes a runtime error in the disassembler

Maybe you mix debug and release dlls which you're not allowed to do so on Windows.
No more ideas without any code / minimal compilable example.

[UbiMiles]

@Christian-Ehrlicher
I think the porblem has to do with me appending the date and time to my string

    sampleName.append(QDateTime::currentDateTime().toString("dd.MM.yyyy hh:mm:ss"));

[UbiMiles]

@UbiMiles yes
testing without appending the date and time works just fine without any crashes

[J.Hilk]

@UbiMiles said in returning empty std::string when converting a QString with a path to an std::string using toStdString:

@Christian-Ehrlicher
I think the porblem has to do with me appending the date and time to my string

    sampleName.append(QDateTime::currentDateTime().toString("dd.MM.yyyy hh:mm:ss"));

on windows, a colon (:)is not a valid character for filenames and/or a path

---

annotation, : can and in fact is part of every windows (full) path, but its reserved for the drive letter association

[UbiMiles]

@J-Hilk said in returning empty std::string when converting a QString with a path to an std::string using toStdString:

sampleName.append(QDateTime::currentDateTime().toString("dd.MM.yyyy hh:mm:ss"));

thanks a lot, much appreciated sir.

[Spade]

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