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Qbservable.SelectMany<TSource, TResult> Method (IQbservable<TSource>, Expression<Func<TSource, IObservable<TResult>>>, Expression<Func<Exception, IObservable<TResult>>>, Expression<Func<IObservable<TResult>>>)

Projects each element of a queryable observable sequence to a queryable observable sequence and flattens the resulting queryable observable sequences into one queryable observable sequence.

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

public static IQbservable<TResult> SelectMany<TSource, TResult>(
	this IQbservable<TSource> source,
	Expression<Func<TSource, IObservable<TResult>>> onNext,
	Expression<Func<Exception, IObservable<TResult>>> onError,
	Expression<Func<IObservable<TResult>>> onCompleted
)

Type Parameters

TSource

The type of source.

TResult

The type of result.

Parameters

source
Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence of elements to project.
onNext
Type: System.Linq.Expressions.Expression<Func<TSource, IObservable<TResult>>>
A transform function to apply to each element.
onError
Type: System.Linq.Expressions.Expression<Func<Exception, IObservable<TResult>>>
A transform function to apply when an error occurs in the source sequence.
onCompleted
Type: System.Linq.Expressions.Expression<Func<IObservable<TResult>>>
A transform function to apply when the end of the source sequence is reached.

Return Value

Type: System.Reactive.Linq.IQbservable<TResult>
A queryable observable sequence whose elements are the result of invoking the one-to-many transform function corresponding to each notification in the input sequence.

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 http://msdn.microsoft.com/en-us/library/bb384936(v=vs.103).aspx or http://msdn.microsoft.com/en-us/library/bb383977(v=vs.103).aspx.
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