Qbservable.SelectMany(Of TSource, TResult) Method (IQbservable(Of TSource), Expression(Of Func(Of TSource, IEnumerable(Of 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)

<ExtensionAttribute> _
Public Shared Function SelectMany(Of TSource, TResult) ( _
	source As IQbservable(Of TSource), _
	selector As Expression(Of Func(Of TSource, IEnumerable(Of TResult))) _
) As IQbservable(Of TResult)
Dim source As IQbservable(Of TSource)
Dim selector As Expression(Of Func(Of TSource, IEnumerable(Of TResult)))
Dim returnValue As IQbservable(Of TResult)

returnValue = source.SelectMany(selector)

Type Parameters


The type of source.


The type of result.


Type: System.Reactive.Linq.IQbservable(Of TSource)
A queryable observable sequence of elements to project.
Type: System.Linq.Expressions.Expression(Of Func(Of TSource, IEnumerable(Of TResult)))
A transform function to apply to each element.

Return Value

Type: System.Reactive.Linq.IQbservable(Of 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(Of 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.