,System.Linq.Expressions.Expression})}

Qbservable.Then(IQbservable, Expression>) method¶

Defined in

Type: Qbservable Namespace: System.Reactive.Linq Assembly: System.Reactive.dll

Applies to

netstandard2.0

public static QueryablePlan<TResult> Then<TSource, TResult>(this IQbservable<TSource> source, Expression<Func<TSource, TResult>> selector)

Summary: Matches when the observable sequence has an available element and projects the element by invoking the selector function.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence.
`TResult`	The type of the elements in the result sequence, returned by the selector function.

Parameters

Name	Type	Description
`source`	[IQbservable](#	Observable sequence to apply the selector on.
`selector`	Expression>	Selector that will be invoked for elements in the source sequence.

Returns: QueryablePlan -- Plan that produces the projected results, to be fed (with other plans) to the When operator.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `selector` is null.