transforming QString to microsoft's CString, and CString to QString

opengpu

is there a perfect solution to Conver between QString and CString?
like this ?
QString to CString: toLocal8Bit for multibyte encoding, toWString for unicode encoding.
CString to QString: fromLocal8Bit for multibyte encoding, fromWString for unicode encoding.

and when to use toLatin1()?
when to use toUtf8()?

raven-worx

@opengpu said in transforming QString to microsoft's CString, and CString to QString:

and when to use toLatin1()?
when to use toUtf8()?

heavily depends on your usecase and what you want to do with the string

opengpu

for example?

opengpu

now i have a MFC project that use CString. the project is using Unicode is VS propety, but i think i have to take care of Multi-Byte.
i am changing this MFC project into Qt project.
so i want to know the right way to convert between QString and CString.
thanks

jsulm

@opengpu said in transforming QString to microsoft's CString, and CString to QString:

for example?

For example if your string only contains Latin-1 characters you can use toLatin1(). It is described in the documentation: https://doc.qt.io/qt-5/qstring.html#toLatin1

Using Google I found: https://stackoverflow.com/questions/6215833/how-do-i-convert-an-atl-mfc-cstring-to-a-qstring

aha_1980

IIRC, when UNICODE is defined, the format of CString and QString is both UTF-16, so that should be the easiest format to exchange data.

https://doc.qt.io/qt-5/qstring.html#fromWCharArray and https://doc.qt.io/qt-5/qstring.html#toWCharArray should work for you.

You can probably also use https://doc.qt.io/qt-5/qstring.html#utf16 but remember that this will only work with casting and on Windows (where wchar_t is 16 bit).

Regards