C++读取Sql Server

代码如下：

// ReadSqlConsole.cpp: 主项目文件。



#include "stdafx.h"

#include <iostream>

#include<iostream>

#include<iomanip>//for setw()

#include"windows.h"



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



using namespace System;

using namespace std;



int main(array<System::String ^> ^args)

{

    ::CoInitialize(NULL);



    //类型在msado15.dll中已定义

    _RecordsetPtr m_pRecordset("ADODB.Recordset");

    _ConnectionPtr m_pConnection("ADODB.Connection");



    _bstr_t bstrSQL("select * from er_order where pactnumber like '13010000%' order by pactnumber"); //对应的sql语句



    try

    {

        clog << "正在连接数据库..." << endl;

        m_pConnection.CreateInstance("ADODB.Connection");//创建Connection对象

        //设置连接字符串，必须是BSTR型或者_bstr_t类型

        _bstr_t strConnect = "Provider=SQLOLEDB; Server=【数据库实例】;Database=【数据库名】; uid=【数据库用户】; pwd=【密码】;";

        m_pConnection->Open(strConnect, "", "", adModeUnknown);//服务器连接



        if (m_pConnection == NULL)

        {

            std::cerr << "Lind data ERROR!\n";

        }



        m_pRecordset.CreateInstance(__uuidof(Recordset));//创建记录集对象



        //取得表中的记录

        m_pRecordset->Open(bstrSQL, m_pConnection.GetInterfacePtr(), adOpenDynamic, adLockOptimistic, adCmdText);



        _variant_t PactNumber, OrigCount;//对应库中的字段



        cout << "--------------合同清单--------------" << endl;

        while (!m_pRecordset->EndOfFile)

        {

            PactNumber = m_pRecordset->GetCollect("Pactnumber");

            OrigCount = m_pRecordset->GetCollect("Origcount");

            cout << "合同号:" << setw(10) << (char*)(_bstr_t)PactNumber;

            cout << "   签单额:" << setw(7) << (char*)(_bstr_t)OrigCount << endl;



            m_pRecordset->MoveNext();//下一条记录

        }

        m_pRecordset->Close();//关闭记录集

    }



    catch (_com_error e)//捕捉异常

    {

        cerr << "\nERROR:" << (char*)e.Description();

    }



    if (m_pConnection->State)

    {

        m_pConnection->Close();

    }



    ::CoUninitialize();



    Console::ReadLine();

    

    return 0;

}