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Observable.Do(Of TSource) Method (IObservable(Of TSource), Action(Of TSource), Action(Of Exception), Action)

Invokes an action for each element in the observable sequence, and invokes an action upon graceful or exceptional termination of the observable sequence.

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

'Declaration
<ExtensionAttribute> _
Public Shared Function Do(Of TSource) ( _
	source As IObservable(Of TSource), _
	onNext As Action(Of TSource), _
	onError As Action(Of Exception), _
	onCompleted As Action _
) As IObservable(Of TSource)
'Usage
Dim source As IObservable(Of TSource)
Dim onNext As Action(Of TSource)
Dim onError As Action(Of Exception)
Dim onCompleted As Action
Dim returnValue As IObservable(Of TSource)

returnValue = source.Do(onNext, onError, _
	onCompleted)

Type Parameters

TSource

The type of source.

Parameters

source
Type: System.IObservable(Of TSource)
The source sequence.
onNext
Type: System.Action(Of TSource)
The action to invoke for each element in the observable sequence.
onError
Type: System.Action(Of Exception)
The action to invoke upon exceptional termination of the observable sequence.
onCompleted
Type: System.Action
The action to invoke upon graceful termination of the observable sequence.

Return Value

Type: System.IObservable(Of TSource)
The source sequence with the side-effecting behavior applied.

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 http://msdn.microsoft.com/en-us/library/bb384936.aspx or http://msdn.microsoft.com/en-us/library/bb383977.aspx.
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