QString to LPCSTR

Massi

Good day Qt,

I'm working in a non-Unicode project on VS2012 and I need to convert a QString to LPCSTR. I have tried the following code:

QString name = ...omitted for clarity.....;
LPCSTR labelName = (LPCSTR)name.toLocal8Bit().constData();

and I'm getting artifact.

Can you help to figure out what's wrong with this code?

Thanks in advance!

Massi

Rondog

As a guess I assume that 'name.toLocal8Bit()' produces a temporary copy of the original QString data. Once this goes out of scope the pointer is no longer valid. LPCSTR is the same as 'const char*'.

If you copied the data to a local buffer (using memcpy for example) it should work. Maybe drop the variable completely (?). The best idea would be a separate QByteArray to hold a more perminant copy of the data:

QByteArray temp_data;
temp_data = name.toLocal8bit();

LPCSTR labelName = temp_data.constData();  // casting shouldn't be needed

Massi

@Rondog Wonderful!!