Qbservable

Qbservable.Count<TSource> Method

Returns a [System.Int32] 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 Count(Of TSource) ( _
    source As IQbservable(Of TSource) _
) As IQbservable(Of Integer)
'Usage
Dim source As IQbservable(Of TSource)
Dim returnValue As IQbservable(Of Integer)

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

Type Parameters

  • TSource
    The type of source.

Parameters

Return Value

Type: System.Reactive.Linq.IQbservable<Int32>
A [System.Int32] 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