QString and BSTR

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something like this ...
@
BSTR test = SysAllocString(QString::utf16());
// to do what you need with "test"
SysFreeString(test)
@

? Offline

i want to set a Qstring variable to my Bstr and
i want to set a Bstr variable to my QString
can you give me example?

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[quote author="kitten" date="1316004185"]i want to set a Qstring variable to my Bstr[/quote]
previous example not work ? ... or some minimal compilable example would be ...
@
QString string("whatever string");
BSTR bstr = SysAllocString(string.utf16());
// to do what you need with "bstr"
SysFreeString(bstr);

@
[quote author="kitten" date="1316004185"]i want to set a Bstr variable to my QString [/quote]
QString string = QString::fromUtf16(yourBSTR);

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thanks alot for your answer
but i use this code and it get me error
@ bool qax_result;
QString st("mil");
BSTR test = SysAllocString(st.utf16());
void _a[] = {(void)&qax_result, (void*)&Row, (void*)&Col, (void*)&test};
qt_metacall(QMetaObject::InvokeMetaMethod, 244, _a);
SysFreeString(test);
return qax_result;@
it is compiled successfully but when i run it, it get me error

giesbert

Hi kitten,

where do you get which error?
Did you try to debug it?

The conversion from QString to BSTR looks generally correct.

giesbert

By the way, do you need a BSTR*?
in the parameters, you write:

@
(void*)&test...
@

a BSTR is already a pointer....

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i use this but it get me error again
@void _a[] = {(void)&qax_result, (void*)&Row, (void*)&Col, (void*)test};@
it get me error on this file
qatomic_windows.h
on function
@inline bool QBasicAtomicInt::ref()@

? Offline

I did a little test, and it works perfectly:
@
QString string("test");
BSTR bstr = SysAllocString(reinterpret_cast<const OLECHAR*>(string.utf16()));
char testing[] = {bstr[0], bstr[1], bstr[2], bstr[3], '\0'};
qDebug(testing);
SysFreeString(bstr);
@

debug window show "test"

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Just out of curiosity, if you delete last parameter(test) from _a array, the problem still exists ?

giesbert

[quote author="kitten" date="1316007780"]i use this but it get me error again
@void _a[] = {(void)&qax_result, (void*)&Row, (void*)&Col, (void*)test};@
it get me error on this file
qatomic_windows.h
on function

@
inline bool QBasicAtomicInt::ref()
@
[/quote]

Which error message do you get???

this is just a parameter assignement, nothing else

? Offline

it work correctly
do you what i want to do?
i have a .net dll now i want to write a program for it
i use dumpcpp to use it , it works correctly and this functions work correctly too
but when i send a text of other languages like persian to this dll it show me ???? in replace of my text

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!http://www.pic.iran-forum.ir/images/81rzhse7v2t3wujmtb1.jpg(error)!
[quote author="Gerolf" date="1316008510"][quote author="kitten" date="1316007780"]i use this but it get me error again
@void _a[] = {(void)&qax_result, (void*)&Row, (void*)&Col, (void*)test};@
it get me error on this file
qatomic_windows.h
on function
@inline bool QBasicAtomicInt::ref()@[/quote]

Which error message do you get???

this is just a parameter assignement, nothing else[/quote]

giesbert

which is the call stack?

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what do you mean by call stack?

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In Visual Studio is: Debug -> Windows -> Call Stack

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this is my call stack when i got error
!http://www.pic.iran-forum.ir/images/vpo7zgu8y0gdpbw6id4l.jpg(call stack)!

? Offline

[quote author="kitten" date="1316008652"]it work correctly
i use dumpcpp to use it , it works correctly and this functions work correctly too
but when i send a text of other languages like persian to this dll it show me ???? in replace of my text
[/quote]

What work correctly ? When your program crashes ?
Also for persian and arabic conversion, maybe "PAText wiki":http://developer.qt.nokia.com/wiki/QPlugs_PAText_Add_Persian_and_Arabic_support_to_WindowsCE_Mobile_applications will help you

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it is generated with dumpcpp
if i use the default it work corrctly on english language
but in persian language it doesn't work correctly

giesbert

How do you enter persian text?
The shown call stack is too short, please copy it out of the call stack window and post it as text.

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@> QtCored4.dll!QBasicAtomicInt::ref() Line 319 + 0x8 bytes C++
QtCored4.dll!QString::QString(const QString & other={...}) Line 729 + 0x51 bytes C++
QtCored4.dll!v_construct<QString>(QVariant::Private * x=0x0030f4b0, const void * copy=0x0070c05c, QString * formal=0x00000000) Line 117 + 0x2a bytes C++
QtCored4.dll!construct(QVariant::Private * x=0x0030f4b0, const void * copy=0x0070c05c) Line 81 + 0xf bytes C++
QtGuid4.dll!construct(QVariant::Private * x=0x0030f4b0, const void * copy=0x0070c05c) Line 182 + 0x12 bytes C++
QtCored4.dll!QVariant::create(int type=10, const void * copy=0x0070c05c) Line 1391 + 0x11 bytes C++
QtCored4.dll!QVariant::QVariant(int typeOrUserType=10, const void * copy=0x0070c05c) Line 1670 + 0x1f bytes C++
new qt finger.exe!QAxBase::internalInvoke() + 0x43c bytes
new qt finger.exe!QAxBase::qt_metacall() + 0x19f bytes
new qt finger.exe!QAxWidget::qt_metacall() + 0x41 bytes
new qt finger.exe!zkemkeeper::CZKEM::WriteLCD(int Row=5, int Col=5, const QString & Text={...}) Line 4828 C++
new qt finger.exe!newqtfinger::newqtfinger(QWidget * parent=0x00000000, QFlags<enum Qt::WindowType> flags={...}) Line 13 + 0x31 bytes C++
new qt finger.exe!main(int argc=1, char * * argv=0x022164a8) Line 6 + 0x17 bytes C++
new qt finger.exe!WinMain(HINSTANCE * instance=0x00890000, HINSTANCE__ * prevInstance=0x00000000, char * __formal=0x006f5eae, int cmdShow=1) Line 131 + 0x12 bytes C++
new qt finger.exe!__tmainCRTStartup() Line 574 + 0x35 bytes C
new qt finger.exe!WinMainCRTStartup() Line 399 C
kernel32.dll!76e733ca()
[Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll]
ntdll.dll!778f9ed2()
ntdll.dll!778f9ea5()
@