Qbservable::SelectMany<TSource, TResult> Method (IQbservable<TSource>, Expression<Func<TSource, 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)

generic<typename TSource, typename TResult>
static IQbservable<TResult>^ SelectMany(
	IQbservable<TSource>^ source, 
	Expression<Func<TSource, IObservable<TResult>^>^>^ selector

Type Parameters


The type of source.


The type of result.


Type: System.Reactive.Linq::IQbservable<TSource>
A queryable observable sequence of elements to project.
Type: System.Linq.Expressions::Expression<Func<TSource, IObservable<TResult>>>
A transform function to apply to each element.

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 on each element of 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 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.