How to convert QStringList to std::string

[micha_eleric]

Trying to read QString from textEdit, break into single lines, then print to file.

sString.split(QRegExp(QLatin1String("\n")));

only thing I found to split QString, but returns QStringList, but can not find how to convert QStringList to std::string so line can be printed to file.

QString sString;
QStringList lineString;
std::string fileString;

sString = ui->textEdit->toPlainText();
lineString = sString.split(QRegExp(QLatin1String("\n")));
int i = 0;
while (i < lineString.length() )
{
    fileString = lineString.toStdList();
    m_myfileOut << fileString << '\n' << std::flush;
}

[ChrisW67]

@micha_eleric This:

fileString = lineString.toStdList();

is probably intended to be:

fileString = lineString.at(i).toStdString();

to select one of the individual QStrings in the lineString list to convert.

I think you have missed @Christian-Ehrlicher's point. Your code (corrected as above):

• Obtains an original string
• Splits the string into lines (using an over-complex mechanism and deprecated classes).
• Converts each QString into a std::string
• Writes it to a file with a trailing newline.

The result is a file that contains the essentially same text as the original string (with the possible exception of extra new line). Why bother with all the steps in between?

[Christian Ehrlicher]

Iterate over the list and convert the single strings to std::string.
Apart from this I don't understand why you first split a string by '\n' just to convert it to combine it afterwards with '\n' again.

[SGaist]

Hi,

Why not use QFile and write the QTextEdit content directly to it ?

[micha_eleric]

@Christian-Ehrlicher said in How to convert QStringList to std::string:

Iterate over the list and convert the single strings to std::string.
Apart from this I don't understand why you first split a string by '\n' just to convert it to combine it afterwards with '\n' again.

the only way I found to get each line separated from a QString

[ChrisW67]

@micha_eleric This:

fileString = lineString.toStdList();

is probably intended to be:

fileString = lineString.at(i).toStdString();

to select one of the individual QStrings in the lineString list to convert.

I think you have missed @Christian-Ehrlicher's point. Your code (corrected as above):

• Obtains an original string
• Splits the string into lines (using an over-complex mechanism and deprecated classes).
• Converts each QString into a std::string
• Writes it to a file with a trailing newline.

The result is a file that contains the essentially same text as the original string (with the possible exception of extra new line). Why bother with all the steps in between?