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Observable.Replay<TSource, TResult> Method (IObservable<TSource>, Func<IObservable<TSource>, IObservable<TResult>>, Int32, TimeSpan, IScheduler)

Returns an observable sequence that is the result of invoking the selector on a connectable observable sequence that shares a single subscription to the underlying sequence replaying bufferSize notifications within window.

Namespace:  System.Reactive.Linq
Assembly:  System.Reactive (in System.Reactive.dll)


<ExtensionAttribute> _
Public Shared Function Replay(Of TSource, TResult) ( _
    source As IObservable(Of TSource), _
    selector As Func(Of IObservable(Of TSource), IObservable(Of TResult)), _
    bufferSize As Integer, _
    window As TimeSpan, _
    scheduler As IScheduler _
) As IObservable(Of TResult)
Dim source As IObservable(Of TSource)
Dim selector As Func(Of IObservable(Of TSource), IObservable(Of TResult))
Dim bufferSize As Integer
Dim window As TimeSpan
Dim scheduler As IScheduler
Dim returnValue As IObservable(Of TResult)

returnValue = source.Replay(selector, _
    bufferSize, window, scheduler)
public static IObservable<TResult> Replay<TSource, TResult>(
    this IObservable<TSource> source,
    Func<IObservable<TSource>, IObservable<TResult>> selector,
    int bufferSize,
    TimeSpan window,
    IScheduler scheduler
generic<typename TSource, typename TResult>
static IObservable<TResult>^ Replay(
    IObservable<TSource>^ source, 
    Func<IObservable<TSource>^, IObservable<TResult>^>^ selector, 
    int bufferSize, 
    TimeSpan window, 
    IScheduler^ scheduler
static member Replay : 
        source:IObservable<'TSource> * 
        selector:Func<IObservable<'TSource>, IObservable<'TResult>> * 
        bufferSize:int * 
        window:TimeSpan * 
        scheduler:IScheduler -> IObservable<'TResult> 
JScript does not support generic types and methods.

Type Parameters

  • TSource
    The type of source.
  • TResult
    The type of result.


  • source
    Type: System.IObservable<TSource>
    The source sequence whose elements will be multicasting through a single shared subscription.
  • selector
    Type: System.Func<IObservable<TSource>, IObservable<TResult>>
    The selector function which can use the multicasted source sequence as many times as needed, without causing multiple subscriptions to the source sequence.
  • bufferSize
    Type: System.Int32
    The maximum element count of the replay buffer.
  • window
    Type: System.TimeSpan
    The maximum time length of the replay buffer.

Return Value

Type: System.IObservable<TResult>
An observable sequence that contains the elements of a sequence produced by multicasting the source sequence within a selector function.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IObservable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .

See Also


Observable Class

Replay Overload

System.Reactive.Linq Namespace