Akka.NET Documentation
API Reference
Akka.Streams.Dsl
SourceOperations Class
SourceOperations Methods
Aggregate(TOut1, TOut2, TMat) Method
AggregateAsync(TOut1, TOut2, TMat) Method
AlsoTo(TOut, TMat) Method
AlsoToMaterialized(TOut, TMat, TMat2, TMat3) Method
BackpressureTimeout(TOut, TMat) Method
Batch(TOut, TOut2, TMat) Method
BatchWeighted(TOut, TOut2, TMat) Method
Buffer(TOut, TMat) Method
Collect(TOut1, TOut2, TMat) Method
CompletionTimeout(TOut, TMat) Method
Concat(TOut, TMat) Method
ConcatMany(TOut1, TOut2, TMat) Method
Conflate(TOut, TMat) Method
ConflateWithSeed(TOut, TMat, TSeed) Method
Delay(TOut, TMat) Method
Detach(TOut, TMat) Method
Expand(TOut1, TOut2, TMat) Method
GroupBy(TOut, TMat, TKey) Method
Grouped(TOut, TMat) Method
GroupedWithin(TOut, TMat) Method
IdleTimeout(TOut, TMat) Method
InitialDelay(TOut, TMat) Method
InitialTimeout(TOut, TMat) Method
Interleave(T1, T2, TMat) Method
InterleaveMaterialized(T1, T2, TMat, TMat2, TMat3) Method
Intersperse Method
KeepAlive(TOut, TInjected, TMat) Method
Limit(T, TMat) Method
LimitWeighted(T, TMat) Method
Log(TOut, TMat) Method
Merge(TOut1, TOut2, TMat) Method
MergeMany(TOut1, TOut2, TMat) Method
MergeMaterialized(TOut1, TOut2, TMat, TMat2, TMat3) Method
MergeSorted Method
Monitor(TOut, TMat, TMat2) Method
OrElse(T, TMat) Method
OrElseMaterialized(T, TMat, TMat2, TMat3) Method
PrefixAndTail(TOut, TMat) Method
Prepend(TOut1, TOut2, TMat) Method
Recover(TOut, TMat) Method
RecoverWith(TOut, TMat) Method
RecoverWithRetries(TOut, TMat) Method
Scan(TOut1, TOut2, TMat) Method
Select(TIn, TOut, TMat) Method
SelectAsync(TIn, TOut, TMat) Method
SelectAsyncUnordered(TIn, TOut, TMat) Method
SelectMany(TOut1, TOut2, TMat) Method
Skip(TOut, TMat) Method
SkipWhile(TOut, TMat) Method
SkipWithin(TOut, TMat) Method
Sliding(TOut, TMat) Method
SplitAfter Method
SplitWhen Method
StatefulSelectMany(TOut1, TOut2, TMat) Method
Sum(TOut, TMat) Method
Take(TOut, TMat) Method
TakeWhile(TOut, TMat) Method
TakeWithin(TOut, TMat) Method
Throttle Method
Transform(TOut1, TOut2, TMat) Method
WatchTermination(TOut, TMat, TMat2) Method
Where(TOut, TMat) Method
WhereNot(TOut, TMat) Method
Zip(T1, T2, TMat) Method
ZipWith(T1, T2, T3, TMat) Method
Click or drag to resize
Akka.NETSourceOperationsTakeWhileTOut, TMat 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: 1.2.3.129 (1.2.3.129)
Syntax
Copy
public static Source<TOut, TMat> TakeWhile<TOut, TMat>(
	this Source<TOut, TMat> flow,
	Predicate<TOut> predicate
)

Parameters

flow
Type: Akka.Streams.DslSourceTOut, TMat
TBD
predicate
Type: SystemPredicateTOut
TBD

Type Parameters

TOut
TBD
TMat
TBD

Return Value

Type: SourceTOut, TMat
TBD

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type SourceTOut, TMat. 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