how do I use mysql++ in a VC++ MFC program 1

[jcostanz]

In a counsul program I have no problems.
As soon as I try it in a MFC program I cannot compile.
I get an conflect with the Connection with a dll or lib file

 

[Cagliostro]

can you say, what the error is? John Fill

ivfmd@mail.md

 

[jcostanz]

I belive that I have solved the original problem, how I don't know. The error was with mysql++ requiring windows.h and it was conflicting with a MFC include.

I still am having connection exceptions. I cannot catch (BadQuery er), I get a Linker error.

msvcprtd.lib(MSVCP60D.dll) : error LNK2005: &quot;public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::~basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(void)&quot; (??1?$basic_strin
g@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@XZ) already defined in mysql++.lib(connection.obj)

 

[Cagliostro]

As i guess, you use STL. In this case remove msvcprtd.lib from linker settings and see results. John Fill

ivfmd@mail.md

 

[jcostanz]

I had to remove both msvcprtd.lib and msvcrtd.lib, but then I got

RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::basic_string<char,struct std::char_traits<char>,class std::allocator<
char> >(char const *,class basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::allocator<char> const &)&quot; (__imp_??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@PBDABV?$allocator@D@1@@Z)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std
::allocator<char> >:perator=(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)&quot; (__imp_??4?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@ABV01@@Z)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::basic_string<char,struct std::char_traits<char>,class std::allocator<
char> >(char const *,unsigned int,class basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::allocator<char> const &)&quot; (__imp_??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@PBDIABV?$allocator@D@1@@Z)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) protected: __thiscall std::basic_ios<char,struct std::char_traits<char> >::basic_ios<char,struct std::char_traits<char> >(void)&quot; (__imp_??0?$basic_ios@DU?$char_traits@D@st
d@@@std@@IAE@XZ)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) protected: __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::basic_streambuf<char,struct std::char_traits<char> >(void)&quot; (__imp_??0?$basic_streambuf@DU
?$char_traits@D@std@@@std@@IAE@XZ)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) public: unsigned int __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::length(void)const &quot; (__imp_?length@?$basic_string@DU?$ch
ar_traits@D@std@@V?$allocator@D@2@@std@@QBEIXZ)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) public: __thiscall std::_Lockit::_Lockit(void)&quot; (__imp_??0_Lockit@std@@QAE@XZ)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) bool __cdecl std:perator==(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_
traits<char>,class std::allocator<char> > const &)&quot; (__imp_??8std@@YA_NABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@0@0@Z)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) public: char const * __thiscall type_info::name(void)const &quot; (__imp_?name@type_info@@QBEPBDXZ)
RepDlg.obj : error LNK2001: unresolved external symbol &quot;__declspec(dllimport) public: unsigned int __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::size(void)const &quot; (__imp_?size@?$basic_string@DU?$char_t
raits@D@std@@V?$allocator@D@2@@std@@QBEIXZ)
Debug/Quotation Tracker.exe : fatal error LNK1120: 10 unresolved externals

the form uses a tree control, is this causing it?? Thanks

 

[Cagliostro]

Does your MFC project support databases? If so, remove database support. I'll donload the library and will try to see how it works. John Fill

ivfmd@mail.md

 

[jcostanz]

The errors were fixed when I recompiled the mysql++ dll with the multithreaded option. Originaly it was single threaded linked.

Thank you for your help

 

[Cagliostro]

Bu the way, I tried what you sayd, but didn't notified any errors. John Fill

ivfmd@mail.md

 

[gigaflop]

Where did you get mysql++ I downloaded the one off the website (

http://www.mysql.com)

and // out the windows.h still get errors everywhere on includes! Anyone know where I can find like a example of how to do this? In a MFC Dialog Based program?

Thanks!