VC连接MySql操作

#import "C:\\program files\\common files\\system\\ado\\msado15.dll" no_namespace rename ("EOF", "adoEOF")

BOOL CMYSQLApp::InitInstance()
{

CoInitialize(NULL); //初始化Com组件
//conPtr=NULL;
//_ConnectionPtr conPtr; //数据库链接指针
conPtr.CreateInstance("ADODB.Connection"); //Connection用于与数据库服务器的链接
//conPtr.CreateInstance(__uuidof(Connection)); //Connection用于与数据库服务器的链接另一种方式
// MySQL ODBC 5.1 Driver为驱动名称（取决于我们为MySql安装的驱动），localhost为服务器地址，test为数据库名，root为用户名（MySql默认用户名为root），sa为密码
CString conStr=_T("Driver={MySQL ODBC 5.1 Driver};Server=localhost;Database=test1;");
/******************连接数据库********************/
try
{
conPtr->ConnectionTimeout = 5; //设置连接时间
conPtr->Open((_bstr_t)conStr, _T("root"),_T("root"), adModeUnknown);
}
catch(_com_error e) //捕捉异常
{
AfxMessageBox(e.ErrorMessage());
}
CoUninitialize(); //释放com组件

AfxEnableControlContainer();

void CMYSQLDlg::OnButton1() //查
{
//CoInitialize(NULL);
UpdateData();
// TODO: Add your control notification handler code here
//_ConnectionPtr conPtr; //数据库链接指针
_RecordsetPtr recordPtr;//数据集指针
recordPtr.CreateInstance(__uuidof(Recordset));

CString cmdStr=_T("select * from  aa");//
//((CMYSQLApp*)AfxGetApp())->
try{

recordPtr->Open(_variant_t(cmdStr),((CMYSQLApp*)AfxGetApp())->conPtr.GetInterfacePtr(), adOpenDynamic, adLockOptimistic, adCmdText);
}
catch(_com_error e)
{
e.Description();

}
recordPtr->MoveFirst();
while (!(recordPtr->adoEOF))
{//获取记录
//CString name=(CString)recordPtr->GetCollect(_variant_t("id")).bstrVal;
int no=recordPtr->GetCollect(_variant_t("id")).intVal;
CString str;
str.Format("%d",no);
m_id=str;
UpdateData(false);
recordPtr->MoveNext();
//break;
}
/*	recordPtr->Close();//关闭记录集

((CMYSQLApp*)AfxGetApp())->conPtr->Close();//关闭连接
recordPtr.Release();//释放空间
((CMYSQLApp*)AfxGetApp())->conPtr.Release();//释放空间*/
}

void CMYSQLDlg::OnButton2() //删
{
// TODO: Add your control notification handler code here
UpdateData();
_RecordsetPtr recordPtr;//数据集指针
recordPtr.CreateInstance(__uuidof(Recordset));
int n;
n=atoi(m_id);
CString cmdStr;
cmdStr.Format(_T("delete from aa where id=%d"),n);//
try{

recordPtr->Open(_variant_t(cmdStr),((CMYSQLApp*)AfxGetApp())->conPtr.GetInterfacePtr(), adOpenDynamic, adLockOptimistic, adCmdText);
}
catch(_com_error e)
{
e.Description();

}

}

void CMYSQLDlg::OnButton3() //、增
{
// TODO: Add your control notification handler code here
UpdateData();
_RecordsetPtr recordPtr;//数据集指针
recordPtr.CreateInstance(__uuidof(Recordset));
int n;
n=atoi(m_id);
CString cmdStr;
cmdStr.Format(_T("insert into aa values(%d)"),n);//
try{
recordPtr->Open(_variant_t(cmdStr),((CMYSQLApp*)AfxGetApp())->conPtr.GetInterfacePtr(), adOpenDynamic, adLockOptimistic, adCmdText);
}
catch(_com_error e)
{
e.Description();

}

}

void CMYSQLDlg::OnButton4() //改
{
// TODO: Add your control notification handler code here
UpdateData();
_RecordsetPtr recordPtr;//数据集指针
recordPtr.CreateInstance(__uuidof(Recordset));
int n;
n=atoi(m_id);
//n=7;
//CString cmdStr=_T("insert into aa values(%d)",m_dd);//
CString cmdStr;
cmdStr.Format(_T("update aa set id=%d where id=%d"),m_dd,n);//
try{
recordPtr->Open(_variant_t(cmdStr),((CMYSQLApp*)AfxGetApp())->conPtr.GetInterfacePtr(), adOpenDynamic, adLockOptimistic, adCmdText);
}
catch(_com_error e)
{
e.Description();

}

}