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Akka.NETSubFlowOperationsTakeWhileTOut, TMat, TClosed Method
Terminate processing (and cancel the upstream publisher) after predicate returns false for the first time. Due to input buffering some elements may have been requested from upstream publishers that will then not be processed downstream of this step. The stream will be completed without producing any elements if predicate is false for the first stream element.

Emits when the predicate is true

Backpressures when downstream backpressures

Completes when predicate returned false or upstream completes

Cancels when predicate returned false or downstream cancels

Namespace:  Akka.Streams.Dsl
Assembly:  Akka.Streams (in Akka.Streams.dll) Version: 1.2.3.42 (1.2.3.42)
Syntax
public static SubFlow<TOut, TMat, TClosed> TakeWhile<TOut, TMat, TClosed>(
	this SubFlow<TOut, TMat, TClosed> flow,
	Predicate<TOut> predicate
)

Parameters

flow
Type: Akka.Streams.DslSubFlowTOut, TMat, TClosed
TBD
predicate
Type: SystemPredicateTOut
TBD

Type Parameters

TOut
TBD
TMat
TBD
TClosed
TBD

Return Value

Type: SubFlowTOut, TMat, TClosed
TBD

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type SubFlowTOut, TMat, TClosed. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
See Also