89 lines
1.6 KiB
C
89 lines
1.6 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 1998, Microsoft Corp. All rights reserved.
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//
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// FILE
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//
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// rowset.h
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//
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// SYNOPSIS
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//
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// This file declares the class Rowset.
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//
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// MODIFICATION HISTORY
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//
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// 02/20/1998 Original version.
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _ROWSET_H_
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#define _ROWSET_H_
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#include <nocopy.h>
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#include <oledb.h>
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///////////////////////////////////////////////////////////////////////////////
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//
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// CLASS
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//
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// Rowset
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//
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// DESCRIPTION
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//
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// This class provides a lightweight, C++ friendly wrapper around an
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// OLE-DB IRowset interface.
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//
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///////////////////////////////////////////////////////////////////////////////
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class Rowset : NonCopyable
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{
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public:
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Rowset() throw ()
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: row(0) { }
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Rowset(IRowset* p) throw ()
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: rowset(p), row(0) { }
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~Rowset() throw ()
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{
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releaseRow();
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}
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void getData(HACCESSOR hAccessor, void* pData)
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{
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_com_util::CheckError(rowset->GetData(row, hAccessor, pData));
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}
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bool moveNext();
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void release() throw ()
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{
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releaseRow();
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rowset.Release();
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}
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void reset()
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{
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_com_util::CheckError(rowset->RestartPosition(NULL));
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}
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operator IRowset*() throw ()
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{
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return rowset;
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}
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IRowset** operator&() throw ()
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{
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return &rowset;
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}
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protected:
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HRESULT releaseRow() throw ();
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CComPtr<IRowset> rowset; // The rowset being adapted.
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HROW row; // The current row handle.
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};
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#endif // _ROWSET_H_
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