How do I override pure virtual in midas multi tier app

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2 total messages Started by Majid Alkahwati Mon, 23 Aug 1999 00:00

#1592

Author: Majid Alkahwati
Date: Mon, 23 Aug 1999 00:00

31 lines
1580 bytes

Hi, I'm creating a server app using midas,
I used the RemoteDataModule wizard,
every thing was fine util I exported my
dataset, then I got Compile errors:
[C++ Error] atlcom.h(162): E2352 Cannot create instance of abstract
class 'CComObject<TDataModuleTestImpl>'.
[C++ Error] atlcom.h(162): E2353 Class 'CComObject<TDataModuleTestImpl>'
is abstract because of '__stdcall
IDataModuleTest::get_Query1(IProviderPtr *) = 0'.

I looked at borlands's examples and tried to do what they did
i.e. I stuck this method into the class TDataModuleTestImpl:
STDMETHOD(get_Query1(IProvider** Value)); // in the class declaration //
*.h file
and:
STDMETHODIMP TDataModuleTestImpl::get_Query1(IProvider** Value)
{
  try
  {
    _di_IProvider IProv = m_DataModule->Query1->Provider;
    IProv->AddRef();
    *Value = IProv;
  }
  catch(Exception &e)
  {
    return Error(e.Message.c_str(), IID_IDataModuleTest_BCB);
  }
  return S_OK;
};
INTo the *.cpp file, but I still get this error??
can anyone help me please???

Re: How do I override pure virtual in midas multi tier app

#1594

Author: PIQUOT J�r�me
Date: Mon, 23 Aug 1999 00:00

48 lines
2141 bytes

this problem comes from BCB4 patch see previous Michael thread

--

-----------------------------------------------------------------
PIQUOT J�r�me
A. WOLFF SA
6, rue de la Gare
67120 ERNOLSHEIM/BRUCHE
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e-mail: wolff@media-net.fr
http://www.media-net.fr/wolff
-----------------------------------------------------------------
Majid Alkahwati <majid@kbd.com.au> a �crit dans le message :
37C0DF92.FFA2D13C@kbd.com.au...
> Hi, I'm creating a server app using midas,
> I used the RemoteDataModule wizard,
> every thing was fine util I exported my
> dataset, then I got Compile errors:
> [C++ Error] atlcom.h(162): E2352 Cannot create instance of abstract
> class 'CComObject<TDataModuleTestImpl>'.
> [C++ Error] atlcom.h(162): E2353 Class 'CComObject<TDataModuleTestImpl>'
> is abstract because of '__stdcall
> IDataModuleTest::get_Query1(IProviderPtr *) = 0'.
>
> I looked at borlands's examples and tried to do what they did
> i.e. I stuck this method into the class TDataModuleTestImpl:
> STDMETHOD(get_Query1(IProvider** Value)); // in the class declaration //
> *.h file
> and:
> STDMETHODIMP TDataModuleTestImpl::get_Query1(IProvider** Value)
> {
>   try
>   {
>     _di_IProvider IProv = m_DataModule->Query1->Provider;
>     IProv->AddRef();
>     *Value = IProv;
>   }
>   catch(Exception &e)
>   {
>     return Error(e.Message.c_str(), IID_IDataModuleTest_BCB);
>   }
>   return S_OK;
> };
> INTo the *.cpp file, but I still get this error??
> can anyone help me please???
>
>

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