students.h

使用OLE DB操作数据库.rar

// Students.H : Declaration of the CStudents class

#ifndef __STUDENTS_H_
#define __STUDENTS_H_

class CStudentsAccessor
{
public:
	LONG m_age;				//年龄下
	TCHAR m_department[51];	//系别
	LONG m_id;				//学号
	TCHAR m_name[51];		//姓名

BEGIN_COLUMN_MAP(CStudentsAccessor)
	COLUMN_ENTRY(1, m_id)
	COLUMN_ENTRY(2, m_name)
	COLUMN_ENTRY(3, m_age)
	COLUMN_ENTRY(4, m_department)
END_COLUMN_MAP()

DEFINE_COMMAND(CStudentsAccessor, _T(" \
	SELECT \
		id, \
		name, \
		age, \
		department  \
		FROM students"))

	// You may wish to call this function if you are inserting a record and wish to
	// initialize all the fields, if you are not going to explicitly set all of them.
	void ClearRecord()
	{
		memset(this, 0, sizeof(*this));
	}
};

class CStudents : public CCommand<CAccessor<CStudentsAccessor> >
{
public:
	HRESULT Open()
	{
		HRESULT		hr;

		hr = OpenDataSource();
		if (FAILED(hr))
			return hr;

		return OpenRowset();
	}
	HRESULT OpenDataSource()
	{
		HRESULT		hr;
		CDataSource db;
		CDBPropSet	dbinit(DBPROPSET_DBINIT);

		dbinit.AddProperty(DBPROP_AUTH_CACHE_AUTHINFO, true);
		dbinit.AddProperty(DBPROP_AUTH_ENCRYPT_PASSWORD, false);
		dbinit.AddProperty(DBPROP_AUTH_MASK_PASSWORD, false);
		dbinit.AddProperty(DBPROP_AUTH_PASSWORD, OLESTR(""));
		dbinit.AddProperty(DBPROP_AUTH_USERID, OLESTR("Admin"));
		dbinit.AddProperty(DBPROP_INIT_DATASOURCE, OLESTR("students.mdb"));
		dbinit.AddProperty(DBPROP_INIT_MODE, (long)16);
		dbinit.AddProperty(DBPROP_INIT_PROMPT, (short)4);
		dbinit.AddProperty(DBPROP_INIT_PROVIDERSTRING, OLESTR(""));
		dbinit.AddProperty(DBPROP_INIT_LCID, (long)1033);
//		dbinit.AddProperty(DBPROP_AUTH_PERSIST_SENSITIVE_AUTHINFO, false);
		hr = db.Open(_T("Microsoft.Jet.OLEDB.4.0"), &dbinit);
		if (FAILED(hr))
			return hr;

		return m_session.Open(db);
	}
	HRESULT OpenRowset()
	{
		// Set properties for open
		CDBPropSet	propset(DBPROPSET_ROWSET);
		propset.AddProperty(DBPROP_IRowsetChange, true);
		propset.AddProperty(DBPROP_UPDATABILITY, DBPROPVAL_UP_CHANGE | DBPROPVAL_UP_INSERT | DBPROPVAL_UP_DELETE);

		return CCommand<CAccessor<CStudentsAccessor> >::Open(m_session, NULL, &propset);
	}
	CSession	m_session;
};

#endif // __STUDENTS_H_