Qbservable

Qbservable.LongCount<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)

Syntax

'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()
public static IQbservable<long> LongCount<TSource>(
    this IQbservable<TSource> source
)
[ExtensionAttribute]
public:
generic<typename TSource>
static IQbservable<long long>^ LongCount(
    IQbservable<TSource>^ source
)
static member LongCount : 
        source:IQbservable<'TSource> -> IQbservable<int64> 
JScript does not support generic types and methods.

Type Parameters

  • TSource
    The type of source.

Parameters

Return Value

Type: System.Reactive.Linq.IQbservable<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<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