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Qbservable.Publish(Of TSource, TResult) Method (IQbservable(Of TSource), Expression(Of Func(Of IObservable(Of TSource), IObservable(Of TResult))))

Returns a queryable observable sequence that is the result of invoking the selector on a connectable queryable observable sequence that shares a single subscription to the underlying sequence.

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

'Declaration
<ExtensionAttribute> _
Public Shared Function Publish(Of TSource, TResult) ( _
	source As IQbservable(Of TSource), _
	selector As Expression(Of Func(Of IObservable(Of TSource), IObservable(Of TResult))) _
) As IQbservable(Of TResult)
'Usage
Dim source As IQbservable(Of TSource)
Dim selector As Expression(Of Func(Of IObservable(Of TSource), IObservable(Of TResult)))
Dim returnValue As IQbservable(Of TResult)

returnValue = source.Publish(selector)

Type Parameters

TSource

The type of source.

TResult

The type of result.

Parameters

source
Type: System.Reactive.Linq.IQbservable(Of TSource)
The source sequence whose elements will be multicasted through a single shared subscription.
selector
Type: System.Linq.Expressions.Expression(Of Func(Of IObservable(Of TSource), IObservable(Of TResult)))
The selector function which can use the multicasted source sequence as many times as needed, without causing multiple subscriptions to the source sequence.

Return Value

Type: System.Reactive.Linq.IQbservable(Of TResult)
A queryable observable sequence that contains the elements of a sequence produced by multicasting the source sequence within a selector function.

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 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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