Observable.Select(Of TSource, TResult) Method (IObservable(Of TSource), Func(Of TSource, TResult))

Projects each element of an observable sequence into a new form with the specified source and selector.

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

<ExtensionAttribute> _
Public Shared Function Select(Of TSource, TResult) ( _
	source As IObservable(Of TSource), _
	selector As Func(Of TSource, TResult) _
) As IObservable(Of TResult)
Dim source As IObservable(Of TSource)
Dim selector As Func(Of TSource, TResult)
Dim returnValue As IObservable(Of TResult)

returnValue = source.Select(selector)

Type Parameters


The type of source.


The type of result.


Type: System.IObservable(Of TSource)
A sequence of elements to invoke a transform function on.
Type: System.Func(Of TSource, TResult)
A transform function to apply to each source element.

Return Value

Type: System.IObservable(Of TResult)
An observable sequence into a new form.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IObservable(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.