Qbservable.Multicast<TSource, TIntermediate, TResult> Method

Returns a queryable observable sequence that contains the elements of a sequence produced by multicasting the source sequence within a selector function.

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

Syntax

'Declaration
<ExtensionAttribute> _
Public Shared Function Multicast(Of TSource, TIntermediate, TResult) ( _
    source As IQbservable(Of TSource), _
    subjectSelector As Expression(Of Func(Of ISubject(Of TSource, TIntermediate))), _
    selector As Expression(Of Func(Of IObservable(Of TIntermediate), IObservable(Of TResult))) _
) As IQbservable(Of TResult)

'Usage
Dim source As IQbservable(Of TSource)
Dim subjectSelector As Expression(Of Func(Of ISubject(Of TSource, TIntermediate)))
Dim selector As Expression(Of Func(Of IObservable(Of TIntermediate), IObservable(Of TResult)))
Dim returnValue As IQbservable(Of TResult)

returnValue = source.Multicast(subjectSelector, _
    selector)

public static IQbservable<TResult> Multicast<TSource, TIntermediate, TResult>(
    this IQbservable<TSource> source,
    Expression<Func<ISubject<TSource, TIntermediate>>> subjectSelector,
    Expression<Func<IObservable<TIntermediate>, IObservable<TResult>>> selector
)

[ExtensionAttribute]
public:
generic<typename TSource, typename TIntermediate, typename TResult>
static IQbservable<TResult>^ Multicast(
    IQbservable<TSource>^ source, 
    Expression<Func<ISubject<TSource, TIntermediate>^>^>^ subjectSelector, 
    Expression<Func<IObservable<TIntermediate>^, IObservable<TResult>^>^>^ selector
)

static member Multicast : 
        source:IQbservable<'TSource> * 
        subjectSelector:Expression<Func<ISubject<'TSource, 'TIntermediate>>> * 
        selector:Expression<Func<IObservable<'TIntermediate>, IObservable<'TResult>>> -> IQbservable<'TResult> 

JScript does not support generic types and methods.

Type Parameters

• TSource
  The type of source.

• TIntermediate
  The type of intermediate.

• TResult
  The type of result.

Parameters

• source
  Type: System.Reactive.Linq.IQbservable<TSource>
  The source sequence which will be multicast in the specified selector function.

• subjectSelector
  Type: System.Linq.Expressions.Expression<Func<ISubject<TSource, TIntermediate>>>
  The factory function to create an intermediate subject through which the source sequence’s elements will be multicast to the selector function.

• selector
  Type: System.Linq.Expressions.Expression<Func<IObservable<TIntermediate>, IObservable<TResult>>>
  The selector function which can use the multicasted source sequence subject to the policies enforced by the created subject.

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 .

See Also

Reference

Qbservable Class

System.Reactive.Linq Namespace