HotelManage.obj : error LNK2001: unresolved external symbol "public: class _com_ptr_t<class _com_IIID<struct _Recordset,&struct __s_GUID _GUID_00000556_0000_0010_8000_00aa006d2ea4> > & __thiscall ADOConn::GetRecordSet(class _bstr_t)" (?GetRecordSet@
ADOConn@@QAEAAV?$_com_ptr_t@V?$_com_IIID@U_Recordset@@$1?_GUID_00000556_0000_0010_8000_00aa006d2ea4@@3U__s_GUID@@A@@@@V_bstr_t@@@Z)
Debug/HotelManage.exe : fatal error LNK1120: 1 unresolved externals
下面上代码

/*这是ADOConn.h文件*/
// ADOConn.h: interface for the ADOConn class.
//
//////////////////////////////////////////////////////////////////////
#if !defined(AFX_ADOCONN_H__1475A50F_DEEB_47CF_838B_1B04AB434E26__INCLUDED_)
#define AFX_ADOCONN_H__1475A50F_DEEB_47CF_838B_1B04AB434E26__INCLUDED_
#import "C:\Program Files\Common Files\System\ado\msado15.dll" no_namespace rename("EOF","adoEOF") rename("BOF","adoBOF")
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class ADOConn
{
public:
BOOL ExecuteSQL(_bstr_t bstrSQL);
_RecordsetPtr& GetRecordSet(_bstr_t bstrSQL);
void ExitConnect();
void OnInitADOConn();
ADOConn();
virtual ~ADOConn();
public:
//添加一个指向Connection对象的指针:
_ConnectionPtr m_pConnection;
//添加一个指向Recordset对象的指针:
_RecordsetPtr m_pRecordset;
// 定义方法
};
#endif // !defined(AFX_ADOCONN_H__1475A50F_DEEB_47CF_838B_1B04AB434E26__INCLUDED_)

/*这是ADOConn.cpp文件*/
// ADOConn.cpp: implementation of the ADOConn class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "HotelManage.h"
#include "ADOConn.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
ADOConn::ADOConn()
{
}
ADOConn::~ADOConn()
{
}
void ADOConn::OnInitADOConn()
{
// 初始化OLE/COM库环境
//AfxOleInit();
::CoInitialize(NULL);
try
{
// 创建Connection对象
m_pConnection.CreateInstance("ADODB.Connection");
//m_pConnection.CreateInstance(__uuidof(Connection));
//m_pConnection->Open("DSN=ADOmysql;Server= localhost;Database=STUDENT","root","root",adModeUnknown);
//_bstr_t strConn = "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=student;Data Source=PC201409021006";
_bstr_t strConn = "Driver={SQL Server};Server=.;Database=Hotel";
//m_pConnection->Open((_bstr_t)("Driver={SQL ServeWr};Server=.;Database=student"),"","",adModeUnknown);
m_pConnection->Open(strConn,"","",adModeUnknown);
}
// 捕捉异常
catch(_com_error e)
{
// 显示错误信息
AfxMessageBox(e.Description());
}
}
void ADOConn::ExitConnect()
{
// 关闭记录集和连接
if (m_pRecordset!= NULL)
m_pRecordset->Close();
m_pConnection->Close();
// 释放环境
::CoUninitialize();
}
//_RecordsetPtr& ADOConn::GetRecordSet(_bstr_t bstrSQL)
BOOL ADOConn::ExecuteSQL(_bstr_t bstrSQL)
{
// _variant_t RecordsAffected;
try
{
// 是否已经连接数据库
if(m_pConnection==NULL)
OnInitADOConn();
// Connection对象的Execute方法:(_bstr_t CommandText,
// VARIANT * RecordsAffected, long Options )
// 其中CommandText是命令字串，通常是SQL命令。
// 参数RecordsAffected是操作完成后所影响的行数,
// 参数Options表示CommandText的类型：adCmdText-文本命令；adCmdTable-表名
// adCmdProc-存储过程；adCmdUnknown-未知
m_pConnection->Execute(bstrSQL,NULL,adCmdText);
return true;
}
catch(_com_error e)
{
AfxMessageBox(e.Description());
return false;
}
}
_RecordsetPtr& ADOConn::GetRecordSet(_bstr_t bstrSQL)
{
try
{
// 连接数据库，如果Connection对象为空，则重新连接数据库
if(m_pConnection==NULL)
OnInitADOConn();
// 创建记录集对象
m_pRecordset.CreateInstance(__uuidof(Recordset));
// 取得表中的记录
m_pRecordset->Open(bstrSQL,m_pConnection.GetInterfacePtr(),adOpenDynamic,adLockOptimistic,adCmdText);
}
// 捕捉异常
catch(_com_error e)
{
// 显示错误信息
AfxMessageBox(e.Description());
}
// 返回记录集
return m_pRecordset;
}

求助啊