Event Pipe for multiple points

Discussion created by andrew_Inwood on Aug 14, 2014
Latest reply on Aug 15, 2014 by Gregor

I have taken the output from some tutorials and the SDK help file and used them to write an example to essentially run some code on a _OnNewValue event.  Works fine.


The way I watch a point is via the PiPoint.EventPipe object. 



            //Get the point
            m_oTagPoint = piServer.PIPoints[sTag];
            if (m_oTagPoint != null)
                //Now try to add an event pipe handler
                    //Get the event pipe
                    piEventPipe = m_oTagPoint.Data.EventPipe;

                    //Get the event pipe event handler
                    piPipeEvents = (_DEventPipeEvents_Event)piEventPipe;
                    piPipeEvents.OnNewValue += new _DEventPipeEvents_OnNewValueEventHandler(PI_Watcher_OnNewValue);


 This works OK.  However, I have two questions: 


1.)  Is this the correct syntax to remove the event handler in the class destructor?



            piPipeEvents.OnNewValue -= new _DEventPipeEvents_OnNewValueEventHandler(PI_Watcher_OnNewValue);

 Secondly, how can I add a watcher to multiple points?