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AF SDK Reference

AFDataReference.InterpolatedValuesAtTimesAsync Method

AFDataReference.InterpolatedValuesAtTimesAsync Method

  • Last UpdatedNov 18, 2025
  • 4 minute read
AFDataReference.InterpolatedValuesAtTimesAsync Method
Retrieves interpolated values at the specified times.

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

Syntax

public virtual Task<AFValues> InterpolatedValuesAtTimesAsync(
	IList<AFTime> times,
	string filterExpression,
	bool includeFilteredValues,
	AFAttributeList inputAttributes,
	AFValues[] inputValues,
	CancellationToken cancellationToken
)
Public Overridable Function InterpolatedValuesAtTimesAsync ( 
	times As IList(Of AFTime),
	filterExpression As String,
	includeFilteredValues As Boolean,
	inputAttributes As AFAttributeList,
	inputValues As AFValues(),
	cancellationToken As CancellationToken
) As Task(Of AFValues)

Dim instance As AFDataReference
Dim times As IList(Of AFTime)
Dim filterExpression As String
Dim includeFilteredValues As Boolean
Dim inputAttributes As AFAttributeList
Dim inputValues As AFValues()
Dim cancellationToken As CancellationToken
Dim returnValue As Task(Of AFValues)

returnValue = instance.InterpolatedValuesAtTimesAsync(times, 
	filterExpression, includeFilteredValues, 
	inputAttributes, inputValues, cancellationToken)
public:
virtual Task<AFValues^>^ InterpolatedValuesAtTimesAsync(
	IList<AFTime>^ times, 
	String^ filterExpression, 
	bool includeFilteredValues, 
	AFAttributeList^ inputAttributes, 
	array<AFValues^>^ inputValues, 
	CancellationToken cancellationToken
)
abstract InterpolatedValuesAtTimesAsync : 
        times : IList<AFTime> * 
        filterExpression : string * 
        includeFilteredValues : bool * 
        inputAttributes : AFAttributeList * 
        inputValues : AFValues[] * 
        cancellationToken : CancellationToken -> Task<AFValues> 
override InterpolatedValuesAtTimesAsync : 
        times : IList<AFTime> * 
        filterExpression : string * 
        includeFilteredValues : bool * 
        inputAttributes : AFAttributeList * 
        inputValues : AFValues[] * 
        cancellationToken : CancellationToken -> Task<AFValues> 

Parameters

times
Type: System.Collections.GenericIListAFTime
List of timestamps at which to retrieve interpolated values
filterExpression
Type: SystemString
A string containing a filter expression. Expression variables are relative to the attribute. Use '.' to reference the containing attribute. A or empty string indicates no filtering. If the attribute does not support the Filters option, the filter will be ignored.
includeFilteredValues
Type: SystemBoolean
Specify to indicate that values which fail the filter criteria are present in the returned data at the times where they occurred with a value set to a "Filtered" enumeration value with bad status. Repeated consecutive failures are omitted.
inputAttributes
Type: OSIsoft.AF.AssetAFAttributeList
The input attributes as previously specified by the data reference in the GetInputs(Object) call. The index of the values will match the index of the corresponding attribute previously returned. These values must be converted to the appropriate UOM required by this data reference.
inputValues
Type: OSIsoft.AF.AssetAFValues
The input values are supplied to the data reference based on the attributes returned in the GetInputs(Object) call. The index of the values will match the index of the corresponding attribute previously returned. These values must be converted to the appropriate UOM required by this data reference.
cancellationToken
Type: System.ThreadingCancellationToken
A cancellation token used to abort processing before completion. Passing the default CancellationToken.None will run to completion or until the PIConnectionInfo.OperationTimeOut period elapses.

Return Value

Type: TaskAFValues
Returns a task whose result is an AFValues collection with the interpolated values at the specified times.

Exceptions

ExceptionCondition
AggregateException Asynchronous methods throw AggregateException on failure which will contain one or more exceptions containing the failure.

Remarks

Note Notes to Callers
This call might use a background task to complete some of its work. See the Threading Overview for some matters to consider when execution transitions to another thread.

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

See Also

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