CNiOleException raised when using NiTimer and Datasocket

[Sverre]

I am trying to write a small application which writes to the datasocket server at regular intervalls.  In OnInitDialog() I’ve added the following code:

 

m_dataSocketConnectionString="dstp://localhost/level_in_percent";

int status = m_myDataSocket.Status;
if (status == CNiDataSocket::Unconnected)
{
         m_myDataSocket.Connect(m_dataSocketConnectionString, CNiDataSocket::WriteAutoUpdate);
}

m_pTimer= new CNiTimer(0.5, false);
m_pTimer->InstallEventHandler(*this, TimerEvent);
m_pTimer->Start();

 

Now the problem is that the line:

 

int status= m_myDataSocket.Status;

 

in the member function TimerEvent raises an NiOleException. When using GetErrorMessage() I get ”CoInitialize has not been called”. What am I doing wrong?

 

Adam

[bilalD]

You are not calling CoInitialize(). The TimerEvent occurs in another thread and since datasocket is a COM component, COM needs to be initialized for that thread. Just call CoInitialize() as the very first function in the TimerEvent member function. That should take care of it.

[Sverre]

Thank you for a swift reply! The solution worked fine.

Adam

[ozyMan]

Hi,CNiOleException raised when I want to call a function which is in a dll.

The code in the function is;

try{
       
        CNiDataSocket socket;
        socket.Init(model,threadAccess);
        socket.URL = "psp:\\\\localhost\\Untitled Library 5\\voltaj";
        socket.SetAccessMode(socket.ReadAutoUpdate);
        socket.Connect();
        CNiDataSocketData data =  socket.GetData();
        double val = data.GetValue();
        return val;
    }
    catch(const char aMessage[])
    {
        cout << endl
        << aMessage
        << endl;
    }

and in the first line of the code,  CNiOleException raised.

Do you have any idea about the problem?

Thanks

Ozan