::CoInitialize(NULL);
_ConnectionPtr m_pCon;
_RecordsetPtr m_pRs;
m_pCon.CreateInstance(__uuidof(Connection));
m_pCon->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=考生考试系统.mdb","","",adModeUnknown);
m_pRs.CreateInstance(__uuidof(Recordset));我是用以上ado方法与数据库相连接的。由于多个对话框都使用同一个数据库,所以我把m_pCon定义成全局变量了,只在进入程序的时候连接,然后离开程序的时候再关闭。但是,就下面这些操作,前几次能用,但操作了几次以后,就不知道为什么产生错误,错误提示是:abnormal program termination.为什么?是不是哪里还需要怎么设置?还是别的什么原因。
m_pRs->AddNew();
m_pRs->PutCollect("Extra",_variant_t(m_beizhu));
m_pRs->Update();急啊,敬请高手指点,不胜感谢……
_ConnectionPtr m_pCon;
_RecordsetPtr m_pRs;
m_pCon.CreateInstance(__uuidof(Connection));
m_pCon->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=考生考试系统.mdb","","",adModeUnknown);
m_pRs.CreateInstance(__uuidof(Recordset));我是用以上ado方法与数据库相连接的。由于多个对话框都使用同一个数据库,所以我把m_pCon定义成全局变量了,只在进入程序的时候连接,然后离开程序的时候再关闭。但是,就下面这些操作,前几次能用,但操作了几次以后,就不知道为什么产生错误,错误提示是:abnormal program termination.为什么?是不是哪里还需要怎么设置?还是别的什么原因。
m_pRs->AddNew();
m_pRs->PutCollect("Extra",_variant_t(m_beizhu));
m_pRs->Update();急啊,敬请高手指点,不胜感谢……
{
ADODB::_ConnectionPtr Conn1 = NULL;
Conn1.CreateInstance( __uuidof( ADODB::Connection ) );
// To see each of the catch blocks work, comment out all but
// one of the following 4 lines, each of which throws an
// exception. // Bogus DataSource Name, raises _com_error
Conn1->Open( L"", L"", L"", -1 ); // Explicitly raise MFC Exception
AfxThrowMemoryException(); // Explicitly raise SEH Exception
RaiseException(EXCEPTION_ACCESS_VIOLATION, 0, 0, NULL); // Explicitly raise exception of a type not caught below
// i.e. to the catch handlers, an "Unknown exception"
throw 0L; // Raises exception of type long
}
// Catch Blocks -- All of which are a subset of the
// Exception Handling demonstrated in LOG.CPP
// in the C++ Rosetta Stone Samples
catch( CException *e )
{
CString strName;
CRuntimeClass *pClass = e->GetRuntimeClass(); printf( "MFC Exception(%s) thrown\n",
(LPCTSTR) pClass->m_lpszClassName );
}
catch( _com_error &e )
{
printf( "#import encountered failed HRESULT\n" );
printf( "\tCode = %08lx\n", e.Error());
}
catch( SEH_Exception &e )
{
printf( "Win32 Structured Exception Raised\n" );
printf( "\t Error Code %08lx\n", e.getSeHNumber() );
}
catch(...)
{
printf( "Caught an exception of unknown type\n" );
}