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StreamBase Client API
IObservableTuple..::GetPreviousValues Method

Returns an IObservableTuple containing the values of the current instance prior to the last update. This can be useful when a NotifyPropertyChanged event is received to access the value of the changed field prior the change, for example to calculate deltas. May return null if the implementation does not track old values.

Namespace: StreamBase.LiveView.API
Assembly: StreamBase.LiveView.API (in StreamBase.LiveView.API.dll) Version: 10.3.0.4 (10.3.0.4)

# Syntax

| C# |  |  | Visual Basic |  |  | Visual C++ |

    IObservableTuple GetPreviousValues()

    Function GetPreviousValues As IObservableTuple

    IObservableTuple^ GetPreviousValues()

#### Return Value

An IObservableTuple which contains the values of this object prior to its last update, or null if the implementation does not perform such tracking.

# See Also

IObservableTuple Interface
StreamBase.LiveView.API Namespace