ienumopcitemattributes.cpp

来自「此为Insight opc client InfoServerExplorer源」· C++ 代码 · 共 137 行

/////////////////////////////////////////////////////////////////////////////
//
//  OPC Data Access VC++ Client:	IEnumOPCItemAttributes.CPP
//									(Source File)
//
/////////////////////////////////////////////////////////////////////////////
//
//          Author: Raphael Imhof
//    Initial Date: 11/04/98
//       $Workfile: IEnumOPCItemAttributes.cpp $
//       $Revision: 1 $
//           $Date: 7/27/99 5:22p $
//   Target System: Microsoft Windows NT 4.0
//     Environment: Visual C++ 5.0 / OPC DataAccess 1.0/2.0
//         Remarks: 
//
/////////////////////////////////////////////////////////////////////////////
//
//     Description: implementation of the CIEnumOPCItemAttributes class.
//					IEnumOPCItemAttributes wrapper.
//					
//
/////////////////////////////////////////////////////////////////////////////
//
//  History of Changes     (Please remove very old comments and blank lines!)
//            $Log: /IDK/OPCServer/clients/VC++/InfoServerExplorer/IEnumOPCItemAttributes.cpp $
// 
// 1     7/27/99 5:22p Imhof
// 
// 1     7/27/99 5:18p Imhof
// 
// 3     1/15/99 6:43p Imhof
// Updated legal notice.
// 
// 2     11/10/98 2:20p Imhof
// Added file header's.
// 
//  $Nokeywords:$ (To avoid useless search while checking in.)
/////////////////////////////////////////////////////////////////////////////
//  Copyright (C) 1998, Siemens Building Technologies, Inc. Landis Division
//
// SIEMENS BUILDING TECHNOLOGIES, INC. IS PROVIDING THE FOLLOWING
// EXAMPLES OF CODE AS SAMPLE ONLY.
//
// SIEMENS BUILDING TECHNOLOGIES, INC.  MAKES NO REPRESENTATIONS
// OR WARRANTIES OF ANY KIND  WITH RESPECT TO THE VALIDTY OF THE 
// CODES   OR   DESIRED   RESULTS   AND   DISCLAIMS   ALL   SUCH 
// REPRESENTATIONS   AND   WARRANTIES,  INCLUDING  FOR  EXAMPLE, 
// WARRANTIES  OF  MERCHANTABILITY  AND FITNESS FOR A PARTICULAR 
// PURPOSE.    SIEMENS  BUILIDNG  TECHNOLOGIES,  INC.  DOES  NOT 
// REPRESENT  OR  WARRANT  THAT  THE  FOLLOWING CODE SAMPLES ARE 
// ACCURATE, VALID, COMPLETE OR CURRENT.
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "infoserverexplorer.h"
#include "IEnumOPCItemAttributes.h"

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

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CIEnumOPCItemAttributes::CIEnumOPCItemAttributes(CComPtr<IEnumOPCItemAttributes> pIEnum)
{
	m_pIEnum = pIEnum;
}

CIEnumOPCItemAttributes::~CIEnumOPCItemAttributes()
{

}

HRESULT CIEnumOPCItemAttributes::Next(	ULONG celt,
										OPCITEMATTRIBUTES** ppItemArray,
										ULONG* pceltFetched)
{ 
	if(m_pIEnum == NULL)
		return E_FAIL;

	HRESULT res = m_pIEnum->Next(celt, ppItemArray, pceltFetched );
	if(FAILED(res))
	{
		TRACE(_T("CIEnumOPCItemAttributes::Next\n"));
	}
     
	return res; 
}

HRESULT CIEnumOPCItemAttributes::Skip(ULONG celt)
{ 
	if(m_pIEnum == NULL)
		return E_FAIL;

	HRESULT res = m_pIEnum->Skip(celt);
	if(FAILED(res))
	{
		TRACE(_T("CIEnumOPCItemAttributes::Skip\n"));
	}
     
	return res; 
}

HRESULT CIEnumOPCItemAttributes::Reset()
{ 
	if(m_pIEnum == NULL)
		return E_FAIL;

	HRESULT res = m_pIEnum->Reset();
	if(FAILED(res))
	{
		TRACE(_T("CIEnumOPCItemAttributes::Reset\n"));
	}
     
	return res; 
}
  
HRESULT CIEnumOPCItemAttributes::Clone(IEnumOPCItemAttributes** ppEnumItemAttributes)
{ 
	if(m_pIEnum == NULL)
		return E_FAIL;

	HRESULT res = m_pIEnum->Clone(ppEnumItemAttributes);
	if(FAILED(res))
	{
		TRACE(_T("CIEnumOPCItemAttributes::Clone\n"));
	}
     
	return res; 
}