高分求在自己的组件中聚合ADO组建的代码！

GoogleGeek 2002-11-16 10:34:44

高分求在自己的组件中聚合ADO组建的代码！
TNND!我自己写的代码在创建组件时竟然出现了无法写入注册标的错误！

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GoogleGeek 2002-12-02

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结帖
谢谢大家的关注！

paul2002 2002-11-29

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那你的方法是什么？

nullhue 2002-11-28

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靠，什么是聚合ADO,有什么用处?

GoogleGeek 2002-11-25

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to:： paul2002()
你的方法我知道！
可能使我的clsid搞错了，我回去查一下！

flashboy 2002-11-24

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ATL's forte is in the development of components but not necessarily in the use of component's. Here are some of the reasons for using ATL instead of MFC:

ATL provides dual interface support as part of its basic implementation. MFC requires a lot of additional work to add dual support.
ATL provides support for all of COM's threading models, in particular the free threading model. MFC does not and probably will never support the free threading model because MFC is thread safe only at the class level.
ATL does not require MFC's 1 meg runtime (MFC40.DLL). This isn't necessarily an issue because it is present on most systems, however it definitely increases load times for your component.

paul2002 2002-11-24

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没问题嘛，我试了一下。
//in atl com
#import "C:\Program Files\Common Files\System\ADO\msado15.dll"\
no_namespace rename("EOF","EndOfFile") named_guids
/////////////////////////////////////////////////////////////////////////////
// CAdvancedMath
class ATL_NO_VTABLE CAdvancedMath :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<CAdvancedMath, &CLSID_AdvancedMath>,
public IAdvancedMath
{
public:
CAdvancedMath()
{
}
~CAdvancedMath( )
{
};
DECLARE_GET_CONTROLLING_UNKNOWN()
HRESULT FinalConstruct()
{
HRESULT hr;
hr = CoCreateInstance( CLSID_Recordset,
GetControllingUnknown(),
CLSCTX_INPROC_SERVER,
IID_IUnknown,
(void**)&m_pSimpleUnknown);

return hr;
}

void FinalRelease()
{
if ( m_pSimpleUnknown )
m_pSimpleUnknown.Release();
}

DECLARE_REGISTRY_RESOURCEID(IDR_ADVANCEDMATH)

BEGIN_COM_MAP(CAdvancedMath)
COM_INTERFACE_ENTRY(IAdvancedMath)
COM_INTERFACE_ENTRY_AGGREGATE( IID_Recordset15, m_pSimpleUnknown.p )
END_COM_MAP()

public:
CComPtr<IUnknown> m_pSimpleUnknown;

// IAdvancedMath
public:
STDMETHOD(Fibonacci)( short sOp, long* plResult );
STDMETHOD(Factorial)( short sOp, long* plResult );
};
// in client
#include "..\Chapter5_Aggregate\Chapter5_Aggregate.h"
#import "C:\Program Files\Common Files\System\ADO\msado15.dll"\
no_namespace rename("EOF","EndOfFile") named_guids

int main( int argc, char *argv[] )
{
cout << "Initializing COM" << endl;

if ( FAILED( CoInitialize( NULL )))
{
cout << "Unable to initialize COM" << endl;
return -1;
}

CLSID clsid;
HRESULT hr;
cout << "Creating aggregate component" << endl;
hr = CLSIDFromProgID( L"Chapter5.Aggregate.1", &clsid );
if ( FAILED( hr ))
{
cout.setf( ios::hex, ios::basefield );
cout << "Failed to convert Progid. HR = " << hr << endl;
return -1;
}

// Use CoCreateInstance
IAdvancedMath* pMath;
hr = CoCreateInstance( clsid,
NULL,
CLSCTX_INPROC,
IID_IAdvancedMath,
(void**) &pMath );
if ( FAILED( hr ))
{
cout.setf( ios::hex, ios::basefield );
cout << "Failed to create server instance. HR = " << hr << endl;
return -1;
}

cout << "Instance created" << endl;
cout << "IAdvancedMath interface created" << endl;

// Try Recordset15, QI through IAdvancedMath
Recordset15* prec = NULL;
hr = pMath->QueryInterface( IID_Recordset15, (LPVOID*)&prec );
if ( FAILED( hr ))
{
cout << "QueryInterface() for IRecordSet15 failed" << endl;
pMath->Release();
CoUninitialize();
return -1;
}
cout<<"IRecordSet15 interface created!"<<endl;

cout << "Releasing IAdvancedMath interface" << endl;
pMath->Release();

cout << "Releasing Recordset15 interface" << endl;
prec->Release();

cout << "Shuting down COM" << endl;
CoUninitialize();

return 0;
}
BTW 0x80040154=类没有注册

GoogleGeek 2002-11-19