Question

我在编写代码的时候出现以下问题，恳请各位老师指点！我用的是VC++2005

void CCzyxxb::sql_delete(CString cCzyName)
{
ADOConn m_AdoConn;
m_AdoConn.OnInitADOConn();
CString sql;
sql.Format("delete from Czyxxb where CzyName='%s'",cCzyName);
m_AdoConn.ExecuteSQL((_bstr_t)sql);
m_AdoConn.ExitConnect();
}
当编译到上面一段程序时出现以下错误。恳请各位大侠指点
1>f:\12l\gzgl\gzgl\czyxxb.cpp(49) : error C2678: binary '+' : no operator found which takes a left-hand operand of type 'const char [46]' (or there is no acceptable conversion)
1> c:\program files\microsoft visual studio 8\vc\atlmfc\include\atlsimpstr.h(666): could be 'ATL::CSimpleStringT<BaseType,t_bMFCDLL> ATL::CSimpleStringT<BaseType,t_bMFCDLL>::operator +(const ATL::CSimpleStringT<BaseType,t_bMFCDLL> &,const ATL::CSimpleStringT<BaseType,t_bMFCDLL> &)' [found using argument-dependent lookup]
1> with
1> [
1> BaseType=wchar_t,
1> t_bMFCDLL=true
1> ]
1> c:\program files\microsoft visual studio 8\vc\atlmfc\include\atlsimpstr.h(677): or 'ATL::CSimpleStringT<BaseType,t_bMFCDLL> ATL::CSimpleStringT<BaseType,t_bMFCDLL>::operator +(const ATL::CSimpleStringT<BaseType,t_bMFCDLL> &,const wchar_t *)' [found using argument-dependent lookup]
1> with
1> [
1> BaseType=wchar_t,
1> t_bMFCDLL=true
1> ]
1> c:\program files\microsoft visual studio 8\vc\atlmfc\include\atlsimpstr.h(688): or 'ATL::CSimpleStringT<BaseType,t_bMFCDLL> ATL::CSimpleStringT<BaseType,t_bMFCDLL>::operator +(const wchar_t *,const ATL::CSimpleStringT<BaseType,t_bMFCDLL> &)' [found using argument-dependent lookup]
1> with
1> [
1> BaseType=wchar_t,
1> t_bMFCDLL=true
1> ]
1> c:\program files\microsoft visual studio 8\vc\atlmfc\include\cstringt.h(2289): or 'ATL::CStringT<BaseType,StringTraits> ATL::CStringT<BaseType,StringTraits>::operator +(const ATL::CStringT<BaseType,StringTraits> &,const ATL::CStringT<BaseType,StringTraits> &)' [found using argument-dependent lookup]
1> with
1> [
1> BaseType=wchar_t,
1> StringTraits=StrTraitMFC_DLL<wchar_t>
1> ]
1> c:\program files\microsoft visual studio 8\vc\atlmfc\include\cstringt.h(2298): or 'ATL::CStringT<BaseType,StringTraits> ATL::CStringT<BaseType,StringTraits>::operator +(const ATL::CStringT<BaseType,StringTraits> &,const wchar_t *)' [found using argument-dependent lookup]
1> with
1> [
1> BaseType=wchar_t,
1> StringTraits=StrTraitMFC_DLL<wchar_t>
1> ]
1> c:\program files\microsoft visual studio 8\vc\atlmfc\include\cstringt.h(2307): or 'ATL::CStringT<BaseType,StringTraits> ATL::CStringT<BaseType,StringTraits>::operator +(const wchar_t *,const ATL::CStringT<BaseType,StringTraits> &)' [found using argument-dependent lookup]
1> with
1> [
1> BaseType=wchar_t,
1> StringTraits=StrTraitMFC_DLL<wchar_t>
....

Answer 1

在项目属性中的配置属性下常规中将字符集更改为使用多字节字符集，主要是VC版本问题。