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Observable.Do<TSource> Method (IObservable<TSource>, Action<TSource>, Action<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)

public static IObservable<TSource> Do<TSource>(
	this IObservable<TSource> source,
	Action<TSource> onNext,
	Action<Exception> onError,
	Action onCompleted
)

Type Parameters

TSource

The type of source.

Parameters

source
Type: System.IObservable<TSource>
The source sequence.
onNext
Type: System.Action<TSource>
The action to invoke for each element in the observable sequence.
onError
Type: System.Action<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<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<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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