Hello, DAO(C++) World!
Posted on 3月 28th, 2012 by cx20
DAO(C++)
DAO（Data Access Object）は、マイクロソフト社が開発した COM ベースの DBMS 接続用 API である。
ソースコード（VC + DAO3.6 + Jet データベース）
#include <stdio.h>
#include <tchar.h>
#import "dao360.dll" no_namespace rename("EOF", "daoEOF")
int _tmain( int argc, TCHAR* argv[] )
{
CoInitialize(NULL);
_DBEnginePtr dbe("DAO.DBEngine.36");
DatabasePtr db = dbe->OpenDatabase( _T("hello.mdb") );
RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message") );
while ( !rs->daoEOF )
{
_variant_t var = rs->Fields->GetItem( 0L )->Value;
_tprintf( _T("%sn"), (LPCTSTR)(_bstr_t)var );
rs->MoveNext();
}
rs->Close();
db->Close();
rs = NULL;
db = NULL;
dbe = NULL;
CoUninitialize();
} |
#include <stdio.h>
#include <tchar.h>
#import "dao360.dll" no_namespace rename("EOF", "daoEOF")
int _tmain( int argc, TCHAR* argv[] )
{
CoInitialize(NULL);
_DBEnginePtr dbe("DAO.DBEngine.36");
DatabasePtr db = dbe->OpenDatabase( _T("hello.mdb") );
RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message") );
while ( !rs->daoEOF )
{
_variant_t var = rs->Fields->GetItem( 0L )->Value;
_tprintf( _T("%sn"), (LPCTSTR)(_bstr_t)var );
rs->MoveNext();
}
rs->Close();
db->Close();
rs = NULL;
db = NULL;
dbe = NULL;
CoUninitialize();
}
ソースコード（VC + DAO12.0 + ACE データベース）
#include <stdio.h>
#include <tchar.h>
#import "acedao.dll" no_namespace rename("EOF", "aceEOF")
int _tmain( int argc, TCHAR* argv[] )
{
CoInitialize(NULL);
_DBEnginePtr dbe("DAO.DBEngine.120");
DatabasePtr db = dbe->OpenDatabase( _T("hello.accdb") );
RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message") );
while ( !rs->aceEOF )
{
_variant_t var = rs->Fields->GetItem( 0L )->Value;
_tprintf( _T("%sn"), (LPCTSTR)(_bstr_t)var );
rs->MoveNext();
}
rs->Close();
db->Close();
rs = NULL;
db = NULL;
dbe = NULL;
CoUninitialize();
} |
#include <stdio.h>
#include <tchar.h>
#import "acedao.dll" no_namespace rename("EOF", "aceEOF")
int _tmain( int argc, TCHAR* argv[] )
{
CoInitialize(NULL);
_DBEnginePtr dbe("DAO.DBEngine.120");
DatabasePtr db = dbe->OpenDatabase( _T("hello.accdb") );
RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message") );
while ( !rs->aceEOF )
{
_variant_t var = rs->Fields->GetItem( 0L )->Value;
_tprintf( _T("%sn"), (LPCTSTR)(_bstr_t)var );
rs->MoveNext();
}
rs->Close();
db->Close();
rs = NULL;
db = NULL;
dbe = NULL;
CoUninitialize();
}
ソースコード（VC + DAO3.6 + ODBC + SQL Server）
#include <stdio.h>
#include <tchar.h>
#import "dao360.dll" no_namespace rename("EOF", "daoEOF")
int _tmain( int argc, TCHAR* argv[] )
{
CoInitialize(NULL);
_DBEnginePtr dbe("DAO.DBEngine.36");
DatabasePtr db = dbe->OpenDatabase( _T(""), FALSE, FALSE,
_T("ODBC;Driver={SQL Server};SERVER=(local);DATABASE=master;")
_T("UID=sa;PWD=P@assW0rd;") );
RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message") );
while ( !rs->daoEOF )
{
_variant_t var = rs->Fields->GetItem( 0L )->Value;
_tprintf( _T("%sn"), (LPCTSTR)(_bstr_t)var );
rs->MoveNext();
}
rs->Close();
db->Close();
rs = NULL;
db = NULL;
dbe = NULL;
CoUninitialize();
} |
#include <stdio.h>
#include <tchar.h>
#import "dao360.dll" no_namespace rename("EOF", "daoEOF")
int _tmain( int argc, TCHAR* argv[] )
{
CoInitialize(NULL);
_DBEnginePtr dbe("DAO.DBEngine.36");
DatabasePtr db = dbe->OpenDatabase( _T(""), FALSE, FALSE,
_T("ODBC;Driver={SQL Server};SERVER=(local);DATABASE=master;")
_T("UID=sa;PWD=P@assW0rd;") );
RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message") );
while ( !rs->daoEOF )
{
_variant_t var = rs->Fields->GetItem( 0L )->Value;
_tprintf( _T("%sn"), (LPCTSTR)(_bstr_t)var );
rs->MoveNext();
}
rs->Close();
db->Close();
rs = NULL;
db = NULL;
dbe = NULL;
CoUninitialize();
}
ソースコード（VC + DAO3.6 + ODBC + Oracle）
#include <stdio.h>
#include <tchar.h>
#import "dao360.dll" no_namespace rename("EOF", "daoEOF")
int _tmain( int argc, TCHAR* argv[] )
{
CoInitialize(NULL);
_DBEnginePtr dbe("DAO.DBEngine.36");
DatabasePtr db = dbe->OpenDatabase( _T(""), FALSE, FALSE,
_T("ODBC;Driver={Oracle in OraDb11g_home1};")
_T("DBQ=ORCL;")
_T("UID=scott;PWD=tiger;") );
RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message") );
// パススルークエリの例（データベース側に依存する SQL を実行する場合）
//RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message FROM DUAL"), dbOpenSnapshot, dbSQLPassThrough );
while ( !rs->daoEOF )
{
_variant_t var = rs->Fields->GetItem( 0L )->Value;
_tprintf( _T("%sn"), (LPCTSTR)(_bstr_t)var );
rs->MoveNext();
}
rs->Close();
db->Close();
rs = NULL;
db = NULL;
dbe = NULL;
CoUninitialize();
} |
#include <stdio.h>
#include <tchar.h>
#import "dao360.dll" no_namespace rename("EOF", "daoEOF")
int _tmain( int argc, TCHAR* argv[] )
{
CoInitialize(NULL);
_DBEnginePtr dbe("DAO.DBEngine.36");
DatabasePtr db = dbe->OpenDatabase( _T(""), FALSE, FALSE,
_T("ODBC;Driver={Oracle in OraDb11g_home1};")
_T("DBQ=ORCL;")
_T("UID=scott;PWD=tiger;") );
RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message") );
// パススルークエリの例（データベース側に依存する SQL を実行する場合）
//RecordsetPtr rs = db->OpenRecordset( _T("SELECT 'Hello, DAO(C++) World!' AS Message FROM DUAL"), dbOpenSnapshot, dbSQLPassThrough );
while ( !rs->daoEOF )
{
_variant_t var = rs->Fields->GetItem( 0L )->Value;
_tprintf( _T("%sn"), (LPCTSTR)(_bstr_t)var );
rs->MoveNext();
}
rs->Close();
db->Close();
rs = NULL;
db = NULL;
dbe = NULL;
CoUninitialize();
}
コンパイル方法
実行結果
Categories: C++, DAO, library
