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: