ADO连接Access数据库(VC)
win8、VS2015、Access20101.导入ADO 动态链接库(一般在stdafx.h)#import "c:\program files\common files\system\ado\msado15.dll" no_namespace rename("EOF","adoEOF")2.初始化COM环境(一般在InitInstance函数中)AfxOleInit();...
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win8、VS2015、Access2010
1.导入ADO 动态链接库(一般在stdafx.h)
#import "c:\program files\common files\system\ado\msado15.dll" no_namespace rename("EOF","adoEOF")
2.初始化COM环境(一般在InitInstance函数中)
AfxOleInit();
3.声明连接对象指针和记录集对象指针
_ConnectionPtr m_pConnection;
_RecordsetPtr m_pRecordset;
4.创建连接对象,打开数据库
CString strConnect;
strConnect.Format(_T("Provider=Microsoft.Jet.OLEDB.4.0;Jet OLEDB:Database Password=%s;Data Source=%s"),_T("passwd"), _T("myData.MDB"));
HRESULT hr;
try
{
hr = m_pConnection.CreateInstance("ADODB.Connection");//创建Connection对象
if (SUCCEEDED(hr))
{
m_pConnection->ConnectionString = (_bstr_t)strConnect;
m_pConnection->Open(L"", L"", L"", adConnectUnspecified);//打开数据库
}
}
catch (_com_error e)
{
}
5.创建记录集对象,执行sql语句
CString strQuery = L"SELECT * FROM table order by name ASC";
try
{
m_pRecordset.CreateInstance("ADODB.Recordset");
m_pRecordset->Open((_bstr_t)strQuery, _variant_t((IDispatch*)m_pConnection, true),adOpenStatic, adLockOptimistic, adCmdText);
}
catch (_com_error e)//捕捉异常
{
}
CString totalstr;
while (!m_pRecordset->adoEOF)
{
_variant_t temp = m_pRecordset->GetCollect("name");
CString tstr = temp.bstrVal;
totalstr = totalstr + tstr + L"\r\n";
m_pRecordset->MoveNext();
}
SetDlgItemText(IDC_EDIT1, totalstr);
6.关闭记录集,关闭数据库连接
m_pRecordset->Close();
m_pConnection->Close();
//常用的sql语句:
CString sql,str;
//增加:
sql.Format(L"insert into table (name) values('%s')",str);
//删除:
sql.Format(L"delete from table where name='%s'",str);
//修改:(PutCollect()也可以用于修改或增加)
sql.Format(L"update table set name='%s'",str);
//查询:
sql.Format(L"select * from table where name='%s'",str);
//(GetCollect()用于获取值)
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