QString to char*

[giginjose]

Hi,

How can I convert QString to char*. I need to use char*, since my development SDK supports only char* for the particular API.

Please do help.

Thanks

GIGIN JOSE

[Zlatomir]

Like this:

QString test = "test test test";
const char *converted = test.toLatin1().data();

QString test = "test test test";
const char *converted = test.toLatin1().data();

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[xavierda]

You may also want to check out the declaration qPrintable.

Xav.

[bhaskar]

Hi Gigin Jose,

If U work with different languages like(korea,china,thai )
Better to use like below in commersial embedded applications in Linux plat form.

QString strName("Test string Data");
char * chrStr = strName.toLocal8Bit().data();

[ChrisW67]

Storing the result of

char *dangling_pointer = strName.toLocal8Bit().data()

char *dangling_pointer = strName.toLocal8Bit().data()

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and variants is dangerous because data() returns a pointer to a temporary QByteArray's data. That QByteArray goes out of scope at the end of the assignment statement leaving a dangling pointer. If you cannot use the intermediate value immediately then best to make the QByteArray explicit. Either:

res = somefunc(strName.toLocal8Bit().data());

res = somefunc(strName.toLocal8Bit().data());

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or

QByteArray ba = strName.toLocal8Bit();
// intervening stuff
res = somefunc(ba.data());

QByteArray ba = strName.toLocal8Bit();
// intervening stuff
res = somefunc(ba.data());

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should be safe (but I am fairly new to the C++ game and happy to be corrected).

[SneakyPeterson]

qPrintable(your QString)