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AF SDK Reference

PIPoint.InterpolatedValuesAtTimesAsync Method

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

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

Syntax

public Task<AFValues> InterpolatedValuesAtTimesAsync(
	IList<AFTime> times,
	string filterExpression,
	bool includeFilteredValues,
	CancellationToken cancellationToken = default
)
Public Function InterpolatedValuesAtTimesAsync ( 
	times As IList(Of AFTime),
	filterExpression As String,
	includeFilteredValues As Boolean,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of AFValues)

Dim instance As PIPoint
Dim times As IList(Of AFTime)
Dim filterExpression As String
Dim includeFilteredValues As Boolean
Dim cancellationToken As CancellationToken
Dim returnValue As Task(Of AFValues)

returnValue = instance.InterpolatedValuesAtTimesAsync(times, 
	filterExpression, includeFilteredValues, 
	cancellationToken)
public:
Task<AFValues^>^ InterpolatedValuesAtTimesAsync(
	IList<AFTime>^ times, 
	String^ filterExpression, 
	bool includeFilteredValues, 
	CancellationToken cancellationToken = CancellationToken()
)
member InterpolatedValuesAtTimesAsync : 
        times : IList<AFTime> * 
        filterExpression : string * 
        includeFilteredValues : bool * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<AFValues> 

Parameters

times
Type: System.Collections.GenericIListAFTime
List of time stamps at which to retrieve interpolated values
filterExpression
Type: SystemString
A filter expression that follows the performance equation syntax.
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.
cancellationToken (Optional)
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 requested times.

Exceptions

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

Remarks

Important note Important
Impersonation of AF SDK asynchronous calls relies on the .NET framework's built-in support for flowing execution context across asynchronous points. When making these calls while impersonating, the thread or runtime must be configured to propagate the impersonation across these asynchronous points (see the SecurityContext documentation for details).

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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