AF SDK Reference

AFDataCache.UpdateData Method (AFTime, Boolean)

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AFDataCache.UpdateData Method (AFTime, Boolean)

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Last UpdatedNov 18, 2025
2 minute read

Update the time series cache for the attributes managed by this AFDataCache.

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

Syntax

public AFErrors<AFAttribute> UpdateData(
	AFTime minTime,
	out bool hasMoreEvents
)

Public Function UpdateData ( 
	minTime As AFTime,
	<OutAttribute> ByRef hasMoreEvents As Boolean
) As AFErrors(Of AFAttribute)

Dim instance As AFDataCache
Dim minTime As AFTime
Dim hasMoreEvents As Boolean
Dim returnValue As AFErrors(Of AFAttribute)

returnValue = instance.UpdateData(minTime, 
	hasMoreEvents)

public:
AFErrors<AFAttribute^>^ UpdateData(
	AFTime minTime, 
	[OutAttribute] bool% hasMoreEvents
)

member UpdateData : 
        minTime : AFTime * 
        hasMoreEvents : bool byref -> AFErrors<AFAttribute>

Parameters

minTime: Type: OSIsoft.AF.TimeAFTime
Timestamp used to compute minimum cache event time.
hasMoreEvents: Type: SystemBoolean
Indicates whether there could be more events in the data source. hasMoreEvent is set to true whenever any of the data sources still have events to be retrieved down to the client.

Return Value

Type: AFErrorsAFAttribute
Returns a list of the errors associated with the AFAttribute that caused the error. If there are no errors, then is returned.

Remarks

The cache will be trimmed before being populated with data from the AFDataPipe. Events that are older than CacheTimeSpan from the are subject to trimming.

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