oledll.cpp

这是一个基于COM的数据库访问技术

// OleDLL.cpp: implementation of the COleDLL class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "OleDbTest.h"
#include "OleDLL.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
COleDLLException::COleDLLException(UINT m_cause, HRESULT hr, CComPtr<IUnknown> m_spUnk)
{
	m_nCause = m_cause;
	m_nHr = hr;
	m_pUnknown = m_spUnk;
}

//********************************************************************************

void COleDLLException::GetError(CString& RetStr)
{
//	CSypOLEDBErr mErr;
	TCHAR mError[2048], mErrNum[10];

	memset(mError, 0, sizeof(TCHAR) * 2048);

/*	if(m_nHr != 0)
	{
		mErr.GetHRRESULTMessage(m_nHr, mError);

		if(_tcsstr(mError, _T("No such interface supported")) != NULL \
			|| _tcsstr(mError, _T("Unspecified error")) != NULL  \
			|| _tcsstr(mError, _T("Errors occurred")) != NULL)
		{
			mError[0] = 0;

			if(!m_pUnknown)
				mErr.GetSingleError(mError);
			else
				if(mErr.AreDBErrorsSupported(m_pUnknown))
					mErr.GetDBErrors((CComPtr<struct IUnknown>)m_pUnknown, mError);	
		}
	}
	
	CString str;
	
	if(!str.LoadString(m_nCause))
		str = _T("(Unable to load error string)");

	lstrcat(mError, _T("\n"));
	lstrcat(mError, str); 

	_itot(m_nCause, mErrNum, 10);

	RetStr = CString("Errorcode : ") + CString(mErrNum) + CString("\n");
	RetStr += mError;*/
}

//********************************************************************************

void COleDLLException::DisplayError()
{
	CString str;

	GetError(str);
	::MessageBox(NULL, str, _T("Error"), MB_OK + MB_ICONSTOP);
}

COleDLL::COleDLL()
{

}

COleDLL::~COleDLL()
{

}