Observable.Window(Of TSource, TWindowOpening, TWindowClosing) Method (IObservable(Of TSource), IObservable(Of TWindowOpening), Func(Of TWindowOpening, IObservable(Of TWindowClosing)))

Projects each element of an observable sequence into zero or more windows.

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

<ExtensionAttribute> _
Public Shared Function Window(Of TSource, TWindowOpening, TWindowClosing) ( _
	source As IObservable(Of TSource), _
	windowOpenings As IObservable(Of TWindowOpening), _
	windowClosingSelector As Func(Of TWindowOpening, IObservable(Of TWindowClosing)) _
) As IObservable(Of IObservable(Of TSource))
Dim source As IObservable(Of TSource)
Dim windowOpenings As IObservable(Of TWindowOpening)
Dim windowClosingSelector As Func(Of TWindowOpening, IObservable(Of TWindowClosing))
Dim returnValue As IObservable(Of IObservable(Of TSource))

returnValue = source.Window(windowOpenings, _

Type Parameters


The type of source.


The type of window opening.


The type of window closing.


Type: System.IObservable(Of TSource)
The source sequence to produce windows over.
Type: System.IObservable(Of TWindowOpening)
The observable sequence whose elements denote the creation of new windows.
Type: System.Func(Of TWindowOpening, IObservable(Of TWindowClosing))
A function invoked to define the closing of each produced window.

Return Value

Type: System.IObservable(Of IObservable(Of TSource))
An observable sequence of windows.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IObservable(Of TSource). When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936.aspx or https://msdn.microsoft.com/en-us/library/bb383977.aspx.