Qbservable.Do<TSource> Method (IQbservable<TSource>, Expression<Action<TSource>>, Expression<Action>)

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

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

public static IQbservable<TSource> Do<TSource>(
	this IQbservable<TSource> source,
	Expression<Action<TSource>> onNext,
	Expression<Action> onCompleted

Type Parameters


The type of source.


Type: System.Reactive.Linq.IQbservable<TSource>
The source sequence.
Type: System.Linq.Expressions.Expression<Action<TSource>>
The action to invoke for each element in the queryable observable sequence.
Type: System.Linq.Expressions.Expression<Action>
The action to invoke upon graceful termination of the queryable observable sequence.

Return Value

Type: System.Reactive.Linq.IQbservable<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 IQbservable<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(v=vs.103).aspx or https://msdn.microsoft.com/en-us/library/bb383977(v=vs.103).aspx.