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PIPointListInterpolatedValueAsync Method

Returns an AFListResultsTKey, TResult containing a list of AFValue objects corresponding to the interpolated value for the PIPoint objects in the list for the requested time. The order of the AFValue objects in the return list is the same order as the corresponding PIPoint in the PIPointList.

Namespace:  OSIsoft.AF.PI
Assembly:  OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version:
public Task<AFListResults<PIPoint, AFValue>> InterpolatedValueAsync(
	AFTime requestedTime,
	CancellationToken cancellationToken = null


Type: OSIsoft.AF.TimeAFTime
The time at which the value is desired.
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: TaskAFListResultsPIPoint, AFValue
Returns a task whose result is an AFListResultsTKey, TResult list containing an interpolated value for each PIPoint object in the PointList. If any point level or server level errors occur, they are added to the corresponding error collections in the AFListResultsTKey, TResult
AggregateException Asynchronous methods throw AggregateException on failure which will contain one or more exceptions containing the failure.
NotSupportedExceptionPI Server versions before 3.4.375 do not support list methods.

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


Supported in: 2.10.5, 2.10, 2.9.5, 2.9, 2.8.5, 2.8
See Also
Enabling Operational Intelligence