'Declaration
Public Class AENotificationPayload
'Usage
Dim instance As AENotificationPayload
public class AENotificationPayload
public ref class AENotificationPayload
'Declaration
Public Class AENotificationPayload
'Usage
Dim instance As AENotificationPayload
public class AENotificationPayload
public ref class AENotificationPayload
The event payload class for OPC Alarms&Events is the AENotificationPayload class. This class contains an embedded AEEventDataPayload object, which contains the actual OPC event. This object is always present; in case of errors and special cases, it contains default or pre-defined values.
A special event priority value is used when no OPC event is present (in case of errors, but also re-gained connections, and a completed refresh). Normal OPC event priorities are in the range from 0(1) to 1000. When creating a payload for a notification where no actual OPC event is present, an event priority value of 9999 is used. The value 9999 is chosen to be higher than the severity of any OPC-A&E event, yet still in a 4-digit range.
The payload class does not contain any fields for OPC server-specific event attributes. If you need to process the OPC event attributes in StreamInsight, derive your own class from AEEventDataPayload, add the fields you need, and develop a code that extracts the attributes from the AEEventData object (in EasyAENotificationEventArgs.EventData).
In addition, there is a Server string property, identifying the source of the event. For a single OPC observable, it always contains the same value, but it becomes useful once you start combining events from different OPC sources into one stream.
System.Object
OpcLabs.EasyOpc.AlarmsAndEvents.ComplexEventProcessing.AENotificationPayload
Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2012, Windows Server 2016; .NET Core, .NET 5, .NET 6: Linux, macOS, Microsoft Windows