//*******************************************************************
void COpcC_Client::DoOpcDisconnect()
{
CWaitCursor wait;
HRESULT hr = S_OK;
if( opcServer.IsOk() && opcGroup.IsOk() )
{
if( dwShutdownConnection )
{
IConnectionPointContainer *pCPC = 0;
hr = opcServer.QueryInterface(IID_IConnectionPointContainer, (void**)&pCPC);
if( SUCCEEDED(hr) )
{
IConnectionPoint *pCallbackCP = 0;
hr = pCPC->FindConnectionPoint(IID_IOPCShutdown, &pCallbackCP);
if( SUCCEEDED(hr) )
{
hr = pCallbackCP->Unadvise(dwShutdownConnection);
pCallbackCP->Release();
}
pCPC->Release();
}
}
if( usingCP )
{
// OPC 2.0 ConnectionPoints
IConnectionPointContainer *pCPC = 0;
hr = opcGroup.QueryInterface(IID_IConnectionPointContainer, (void**)&pCPC);
if( SUCCEEDED(hr) && dwConnection1 ) // This server supports 2.0
{
IConnectionPoint *pCallbackCP = 0;
hr = pCPC->FindConnectionPoint(IID_IOPCDataCallback, &pCallbackCP);
if( SUCCEEDED(hr) )
{
hr = pCallbackCP->Unadvise(dwConnection1);
pCallbackCP->Release();
}
pCPC->Release();
}
}
else
// call IDataObject::DUnadvise to turn off data notification
{
DataObject dataObject;
HRESULT hr = dataObject.Attach( opcGroup );
if( SUCCEEDED(hr) )
{
if( dwConnection1 )
hr = dataObject.DUnadvise(dwConnection1);
if( dwConnection2 )
hr = dataObject.DUnadvise(dwConnection2);
dataObject.Detach();
}
}
opcServer.RemoveGroup(groupHandle, FALSE);
}
opcGroup.Detach();
opcServer.Detach();
Sleep( 100 );
// now that the group is released and unadvised, no more data will
// be sent from the server. It is safe to delete the items
while( !items.IsEmpty() )
delete items.RemoveTail();
}
