VC中，使用ODBC 驱动连接Mysql

1  建立VC工程，添加以下头文件

   #include "AtlConv.h"

#import "c:\Program Files\Common Files\System\ado\msadox.dll" 

#import "C:\Program Files\Common Files\System\ado\msado15.dll"  no_namespace rename("EOF", "adoEOF") 

#include <ODBCinst.h>

#pragma comment(lib, "ODBC32.lib")

2  实现代码

   BOOL CheckMysql()

{
HRESULT hr = S_OK; 
BOOL   bRet = TRUE;

_ConnectionPtr m_pConnection; 
_RecordsetPtr m_pRecordset;

try
{
// 创建Connection对象
if (!SUCCEEDED(m_pConnection.CreateInstance("ADODB.Connection") ))
{
MessageBoxA(NULL, "ADODB.Connection 创建失败！", "Connect String", MB_OK);
}

_bstr_t strConnect = "Provider=MSDASQL.1;Driver={MySQL ODBC 5.1 Driver};Password=mima;Persist Security Info=True;User ID=user;DATABASE=db;SERVER=localhost;PORT=34223";

if (SUCCEEDED(m_pConnection->Open(strConnect,"","",0)))
{
OutputDebugString(_T("[BillDBSvr] - Info 当前打开数据库连接成功! "));

m_pRecordset.CreateInstance(_uuidof(Recordset));//初始化Recordset指针

char szSql[512] = {0};

_bstr_t strSql= "select * from miaosha_tasks";

BSTR bstrSQL = strSql.GetBSTR();

HRESULT hrRet = m_pRecordset->Open(bstrSQL,(IDispatch*)m_pConnection,adOpenDynamic,adLockOptimistic,adCmdText); 
if (SUCCEEDED(hrRet))
{
OutputDebugString(_T("[BillDBSvr] - Info 当前访问数据库表成功! "));
}
else
{
OutputDebugString(_T("[BillDBSvr] - Info 当前访问数据库表失败! "));
}

_variant_t value; //VARIANT数据类型
while(!m_pRecordset->adoEOF)//遍历所有记录
{ 
value = m_pRecordset->GetCollect(0);
if (value.vt != VT_NULL)
{
value.Clear();
}
}

m_pRecordset->Close();
}
else
{
OutputDebugString(_T("[BillDBSvr] - Info 当前打开数据库连接失败! "));
}
m_pConnection->Close();
}

// 捕捉异常
catch(_com_error e)
{
// 显示错误信息
::MessageBox(NULL, e.Description(), _T("Sql Server Error"), MB_OK);

bRet = FALSE;
}

return bRet;

}