Qbservable.LongCount(Of TSource) Method

Returns a [System.Int64] that represents the total number of elements in a queryable observable sequence.

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

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

returnValue = source.LongCount()

Type Parameters

TSource

The type of source.

Parameters

source
Type: System.Reactive.Linq.IQbservable(Of TSource)
A queryable observable sequence that contains elements to be counted.

Return Value

Type: System.Reactive.Linq.IQbservable(Of Int64)
A [System.Int64] that represents the total number of elements in a queryable observable sequence.

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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