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Qbservable.Any(Of TSource) Method (IQbservable(Of TSource))

Determines whether a queryable observable sequence contains any elements.

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

'Declaration
<ExtensionAttribute> _
Public Shared Function Any(Of TSource) ( _
	source As IQbservable(Of TSource) _
) As IQbservable(Of Boolean)
'Usage
Dim source As IQbservable(Of TSource)
Dim returnValue As IQbservable(Of Boolean)

returnValue = source.Any()

Type Parameters

TSource

The type of source.

Parameters

source
Type: System.Reactive.Linq.IQbservable(Of TSource)
A queryable observable sequence to check for non-emptiness.

Return Value

Type: System.Reactive.Linq.IQbservable(Of Boolean)
True if a queryable observable sequence contains any elements; otherwise, false.

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.
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