郁闷 SDI里使用ADO，ConnectionPtr m_pConnection;编译出错！该如何解决

郁闷 SDI里使用ADO，_ConnectionPtr m_pConnection;编译出错！
我觉得代码没错：
第一步：

C/C++ code

        // Exclude rarely-used stuff from Windows headers#include <afxwin.h>         // MFC core and standard components#include <afxext.h>         // MFC extensions#include <afxdisp.h>        // MFC Automation classes#include <afxdtctl.h>        // MFC support for Internet Explorer 4 Common Controls#ifndef _AFX_NO_AFXCMN_SUPPORT#include <afxcmn.h>            // MFC support for Windows Common Controls#endif // _AFX_NO_AFXCMN_SUPPORT#import "C:\Program Files\Common Files\System\ADO\msado15.dll" no_namespace rename("EOF","adoEOF")//连接数据库

第二步：

C/C++ code

BOOL CEX2App::InitInstance(){    AfxEnableControlContainer();    AfxOleInit();

第三步：

C/C++ code

public:    CEX2Doc* GetDocument();    _ConnectionPtr m_pConnection;//定义一个指向connection对象的指针

第四步：

C/C++ code

void CEX2View::OnInitialUpdate(){    CFormView::OnInitialUpdate();    GetParentFrame()->RecalcLayout();    ResizeParentToFit();    HRESULT hr;    try    {        hr=m_pConnection.CreateInstance("ADODB.Connection");//创建Connection对象        if(SUCCEEDED(hr))        {            hr=m_pConnection->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=test.mdb","","",adModeUnknown);//连接数据库        }    }    catch(_com_error e)//捕捉异常    {     CString errormessage;     errormessage.Format("连接数据库失败!"\r\n错误信息：%s",e.ErrorMessage());     AfxMessageBox(errormessage);    }

第五步：

C/C++ code

CEX2View::~CEX2View(){    m_pConnection->Close();        m_pConnection.Release();}

编译时候出错：
g:\c++\myprojects\ex2\ex2view.h(29) : error C2146: syntax error : missing ';' before identifier 'm_pConnection'
g:\c++\myprojects\ex2\ex2view.h(29) : error C2501: '_ConnectionPtr' : missing storage-class or type specifiers
g:\c++\myprojects\ex2\ex2view.h(29) : error C2501: 'm_pConnection' : missing storage-class or type specifiers
G:\c++\MyProjects\EX2\EX2View.cpp(48) : error C2065: 'm_pConnection' : undeclared identifier
G:\c++\MyProjects\EX2\EX2View.cpp(48) : error C2227: left of '->Close' must point to class/struct/union
G:\c++\MyProjects\EX2\EX2View.cpp(49) : error C2228: left of '.Release' must have class/struct/union type
G:\c++\MyProjects\EX2\EX2View.cpp(77) : error C2228: left of '.CreateInstance' must have class/struct/union type
G:\c++\MyProjects\EX2\EX2View.cpp(80) : error C2227: left of '->Open' must point to class/struct/union
G:\c++\MyProjects\EX2\EX2View.cpp(80) : error C2065: 'adModeUnknown' : undeclared identifier
G:\c++\MyProjects\EX2\EX2View.cpp(83) : error C2061: syntax error : identifier '_com_error'

[解决办法]
把这个加上试试：
#import "c:\program files\common files\system\ado\msado15.dll" named_guids rename_namespace("ADOCG") rename("EOF", "EndOfFile") rename("BOF","FirstOfFile")
using namespace ADOCG;
#include "icrsint.h"
[解决办法]
rebuild all
------解决方案--------------------

_ConnectionPtr m_pConnection;
程序不能识别你的 m_pConnection，也就是说不知道_ConnectionPtr类，所以应是缺少定义_ConnectionPtr的文件
[解决办法]
同意楼上的
[解决办法]
是不是那个#import "C:\Program Files\Common Files\System\ADO\msado15.dll" no_namespace rename("EOF","adoEOF")//连接数据库
应该移动到#endif的上面去？是不是这句根本就没有被编译？
 

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