Hi Alejandro!
i know this may be a newbie question, but i need to convert a string from
System::String^ to char*, in the msdn page tells how, but i need to set to
/clr:oldSyntax and i dont want it because in further editions of .net this
will be deprecated or so on.. .
so, please, anybody can tellme how to convert from System::String::^ to
char* and viceversa?
For convertion char*/wchar_t* into System::String you need just the
"constructor of "System::String".
For the conversion to char*/wchar_t* you need to explicit allocate
memory and therefor I suggest to use the following method.
It seems to be overloaded, but it can handle all situations (like
exceptions and so on...):
<code>
struct StringConvA
{
char *szAnsi;
StringConvA(System::String* s)
:
szAnsi(static_cast<char*>(System::Runtime::Interop Services::Marshal::StringToHGlobalAnsi(s).ToPointe r()))
{}
~StringConvA()
{
System::Runtime::InteropServices::Marshal::FreeHGl obal(IntPtr(szAnsi));
}
operator LPCSTR() const
{
return szAnsi;
}
};
struct StringConvW
{
wchar_t *szUnicode;
StringConvW(System::String* s)
:
szUnicode(static_cast<wchar_t*>(System::Runtime::I nteropServices::Marshal::StringToHGlobalUni(s).ToP ointer()))
{}
~StringConvW()
{
System::Runtime::InteropServices::Marshal::FreeHGl obal(IntPtr(szUnicode));
}
operator LPCWSTR() const
{
return szUnicode;
}
};
#ifdef _UNICODE
#define StringConvT StringConvW
#else
#define StringConvT StringConvA
#endif
int _tmain()
{
String *s = S"abc";
std::string ansi = StringConvA(s);
std::wstring unicode = StringConvW(s);
_tprintf(_T("%s"), (LPCTSTR) StringConvT(s));
}
</code>
--
Greetings
Jochen
My blog about Win32 and .NET
http://blog.kalmbachnet.de/ 
