AF SDK Reference

AFDataPipe.GetObserverEvents Method (Boolean)

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AFDataPipe.GetObserverEvents Method (Boolean)

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Last UpdatedNov 18, 2025
2 minute read

Trigger retrieval of new events that occurred on the PIPoint objects monitored by the data pipe. The new events will be sent to the IObserver objects registered with the data pipe.

Namespace: OSIsoft.AF.Data
Assembly: OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version: 3.1.1.1182

Syntax

public AFErrors<AFAttribute> GetObserverEvents(
	out bool hasMoreEvents
)

Public Function GetObserverEvents ( 
	<OutAttribute> ByRef hasMoreEvents As Boolean
) As AFErrors(Of AFAttribute)

Dim instance As AFDataPipe
Dim hasMoreEvents As Boolean
Dim returnValue As AFErrors(Of AFAttribute)

returnValue = instance.GetObserverEvents(hasMoreEvents)

public:
AFErrors<AFAttribute^>^ GetObserverEvents(
	[OutAttribute] bool% hasMoreEvents
)

member GetObserverEvents : 
        hasMoreEvents : bool byref -> AFErrors<AFAttribute>

Parameters

hasMoreEvents: Type: SystemBoolean
Indicates whether there could be more events in the pipe. hasMoreEvent is set to true whenever any of the data source still have events to be retrieved.

Return Value

Type: AFErrorsAFAttribute
A collection of AFErrorsTKey if any error occurred or , if there were not any errors.

Remarks

This method could throw InvalidOperationException if there is no IObserver registered with the data pipe.

Version Information

AFSDK

Supported in: 3.1.1, 3.1.0, 3.0.2, 3.0.1, 3.0.0, 2.10.11, 2.10.5, 2.10.0, 2.10, 2.9.5, 2.9, 2.8.5, 2.8, 2.7.5, 2.7, 2.6

AF SDK Reference