oleodbcset.h

< Visual C++数据库经典开发实例精解>>的实例源码

// OleOdbcSet.h : interface of the COleOdbcSet class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_OLEODBCSET_H__1AE9CF12_4337_48ED_8071_ACE6007EF427__INCLUDED_)
#define AFX_OLEODBCSET_H__1AE9CF12_4337_48ED_8071_ACE6007EF427__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CPassword
{
public:
	CPassword()
	{
		memset( (void*)this, 0, sizeof(*this) );
	};

	wchar_t m_userid[8];
	wchar_t m_password[6];


BEGIN_COLUMN_MAP(CPassword)
		COLUMN_ENTRY_TYPE(1, DBTYPE_WSTR, m_userid)
		COLUMN_ENTRY_TYPE(2, DBTYPE_WSTR, m_password)
END_COLUMN_MAP()

};

class COleOdbcSet : public CCommand<CAccessor<CPassword> >
{
public:

	HRESULT Open()
	{
		CDataSource db;
		CSession	session;
		HRESULT		hr;

		CDBPropSet	dbinit(DBPROPSET_DBINIT);
		dbinit.AddProperty(DBPROP_AUTH_PERSIST_SENSITIVE_AUTHINFO, false);
		dbinit.AddProperty(DBPROP_INIT_DATASOURCE, "passworddsn");
		dbinit.AddProperty(DBPROP_INIT_PROMPT, (short)4);
		dbinit.AddProperty(DBPROP_INIT_LCID, (long)2052);

		hr = db.OpenWithServiceComponents("MSDASQL.1", &dbinit);
		if (FAILED(hr))
			return hr;

		hr = session.Open(db);
		if (FAILED(hr))
			return hr;

		CDBPropSet	propset(DBPROPSET_ROWSET);
		propset.AddProperty(DBPROP_CANFETCHBACKWARDS, true);
		propset.AddProperty(DBPROP_IRowsetScroll, true);
		propset.AddProperty(DBPROP_IRowsetChange, true);
		propset.AddProperty(DBPROP_UPDATABILITY, DBPROPVAL_UP_CHANGE | DBPROPVAL_UP_INSERT | DBPROPVAL_UP_DELETE );

		hr = CCommand<CAccessor<CPassword> >::Open(session, "SELECT * FROM password", &propset);
		if (FAILED(hr))
			return hr;

		return MoveNext();
	}

};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_OLEODBCSET_H__1AE9CF12_4337_48ED_8071_ACE6007EF427__INCLUDED_)