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Rank: Member
Groups: Member
Joined: 8/26/2009
Posts: 10
Location: Canada
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I am trying to subscribe to the OnDisconnect event of the Server object but I am getting an invalid cast exception.
Here is what I am doing.
Can you tell me what is going wrong? Any help would be most appreciated!
Regards,
Joel.
PISDK.PISDK _piSDK = new PISDK.PISDK();
Server _piSDKServer = _piSDK.Servers["server_name"];
IServerDisconnect _srvdis = (IServerDisconnect) _piSDKServer; //The error occurs here. Invalid cast error on DisconnecEvents.
ServerDisconnectEvents srvdisevt = _srvdis.DisconnectEvents;
srvdisevt.OnDisconnect += srvdisevt_OnDisconnect;
void srvdisevt_OnDisconnect(Server pServer)
{
...
}
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Rank: Administration
Groups: Administration
Joined: 6/20/2008
Posts: 612
Location: Cheshire, United Kingdom.
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Hi Joel, Set IServerDisconnect to Servers collection rather than an individual server. So Code:
ServerDisconnect _srvdis = (IServerDisconnect) _piSDK.Servers;
Rhys. Principal Consultant
Real-Time Data Management @ Wipro Technologies
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Rank: Member
Groups: Member
Joined: 8/26/2009
Posts: 10
Location: Canada
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Hi,
Thanks for the reply.
I tried as you suggested but I am receiving the same error as when I used the individual Server.
Your sample shows that _srvdis is of type ServerDisconnect. Is this a typo? I do not see an object of type ServerDisconnect...only IServerDisconnect.
Regards,
Joel.
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Rank: Member
Groups: Member
Joined: 8/26/2009
Posts: 10
Location: Canada
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I've changed the code thusly:
_DServerDisconnectEvents_Event srvdisevt = (_DServerDisconnectEvents_Event) _piSDKServer;
srvdisevt.OnDisconnect += srvdisevt_OnDisconnect;
Rather than declare them as IServerDisconnect and ServerDisconnectEvents, I am using _DServerDisconnectEvents_Event.
I am not sure what the _D classes are but they seem to work...same goes for EventPipes.
This code executes without exception. Now I just need to test if the server actually raises the event like it is supposed to.
I will let you know.
Regards,
Joel.
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Rank: Member
Groups: Member
Joined: 8/26/2009
Posts: 10
Location: Canada
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The last code I posted allows me to receive the disconnect event.
Regards,
Joel.
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Rank: Administration
Groups: Administration
Joined: 6/20/2008
Posts: 612
Location: Cheshire, United Kingdom.
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Hi Joel, OK cool, glad you got it to work. Strangely I ran some VBA code and the IServerDisconnect interface works a treat so must be something lost in transalation with COM. I will follow up with OSI for completeness as to why the difference... Cheers, Rhys. Principal Consultant
Real-Time Data Management @ Wipro Technologies
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