Qbservable.PublishLast<TSource, TResult> Method
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 containing only the last notification.
Namespace: System.Reactive.Linq
Assembly: System.Reactive.Providers (in System.Reactive.Providers.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function PublishLast(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.PublishLast(selector)
public static IQbservable<TResult> PublishLast<TSource, TResult>(
this IQbservable<TSource> source,
Expression<Func<IObservable<TSource>, IObservable<TResult>>> selector
)
[ExtensionAttribute]
public:
generic<typename TSource, typename TResult>
static IQbservable<TResult>^ PublishLast(
IQbservable<TSource>^ source,
Expression<Func<IObservable<TSource>^, IObservable<TResult>^>^>^ selector
)
static member PublishLast :
source:IQbservable<'TSource> *
selector:Expression<Func<IObservable<'TSource>, IObservable<'TResult>>> -> IQbservable<'TResult>
JScript does not support generic types and methods.
Type Parameters
- TSource
The type of source.
- TResult
The type of result.
Parameters
- source
Type: System.Reactive.Linq.IQbservable<TSource>
The source sequence whose elements will be multicasted through a single shared subscription.
- selector
Type: System.Linq.Expressions.Expression<Func<IObservable<TSource>, IObservable<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<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<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .