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AF SDK Reference

AFDataReference.InterpolatedValueAsync Method

  • Last UpdatedNov 18, 2025
  • 3 minute read
AFDataReference.InterpolatedValueAsync Method
Returns a single AFValue whose value is interpolated at the passed time.

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

Syntax

public virtual Task<AFValue> InterpolatedValueAsync(
	AFTime time,
	AFAttributeList inputAttributes,
	AFValues inputValues,
	CancellationToken cancellationToken
)
Public Overridable Function InterpolatedValueAsync ( 
	time As AFTime,
	inputAttributes As AFAttributeList,
	inputValues As AFValues,
	cancellationToken As CancellationToken
) As Task(Of AFValue)

Dim instance As AFDataReference
Dim time As AFTime
Dim inputAttributes As AFAttributeList
Dim inputValues As AFValues
Dim cancellationToken As CancellationToken
Dim returnValue As Task(Of AFValue)

returnValue = instance.InterpolatedValueAsync(time, 
	inputAttributes, inputValues, cancellationToken)
public:
virtual Task<AFValue^>^ InterpolatedValueAsync(
	AFTime time, 
	AFAttributeList^ inputAttributes, 
	AFValues^ inputValues, 
	CancellationToken cancellationToken
)
abstract InterpolatedValueAsync : 
        time : AFTime * 
        inputAttributes : AFAttributeList * 
        inputValues : AFValues * 
        cancellationToken : CancellationToken -> Task<AFValue> 
override InterpolatedValueAsync : 
        time : AFTime * 
        inputAttributes : AFAttributeList * 
        inputValues : AFValues * 
        cancellationToken : CancellationToken -> Task<AFValue> 

Parameters

time
Type: OSIsoft.AF.TimeAFTime
The time at which the value is desired.
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: TaskAFValue
Returns a task whose result is the AFValue for the attribute. The timestamp of the value will be at the requested time.

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

In This Topic
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