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PIPointUpdateValuesAsync Method (IListAFValue, AFUpdateOption, AFBufferOption, CancellationToken)

This method writes or replaces one or more values on the target system using the configured data reference.

Namespace:  OSIsoft.AF.PI
Assembly:  OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version:
public Task<AFErrors<AFValue>> UpdateValuesAsync(
	IList<AFValue> values,
	AFUpdateOption updateOption,
	AFBufferOption bufferOption,
	CancellationToken cancellationToken = null


Type: System.Collections.GenericIListAFValue
The values to be written or replaced on the target system.
Type: OSIsoft.AF.DataAFUpdateOption
An enumeration value that specifies how to treat duplicate values. It can also be used to specify that an existing value should be removed.
Type: OSIsoft.AF.DataAFBufferOption
An enumeration value that specifies buffering option.
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: TaskAFErrorsAFValue
Returns a task whose result is if there are no errors. Otherwise the result is an AFErrorsTKey instance containing error information.
AggregateException Asynchronous methods throw AggregateException on failure which will contain one or more exceptions containing the failure.

For successful data write through Buffer, this method requires that PI Buffer Subsystem (PIBufSS) needs to be correctly pre-configured with Buffering Manager. Currently, buffering data through PIBufSS has a limitation where error feedback from PI Data Archive cannot be returned to the caller.

Data write through Buffer will be fanned to Collective members.

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