Qbservable

Qbservable.Any<TSource> Method (IQbservable<TSource>)

Determines whether a queryable observable sequence contains any elements.

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

Syntax

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

Type Parameters

  • TSource
    The type of source.

Parameters

Return Value

Type: System.Reactive.Linq.IQbservable<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<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

Any Overload

System.Reactive.Linq Namespace

Qbservable.Any<TSource> Method (IQbservable<TSource>, Expression<Func<TSource, Boolean>>)

Determines whether all elements of a queryable observable sequence satisfies a condition.

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

Syntax

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

returnValue = source.Any(predicate)
public static IQbservable<bool> Any<TSource>(
    this IQbservable<TSource> source,
    Expression<Func<TSource, bool>> predicate
)
[ExtensionAttribute]
public:
generic<typename TSource>
static IQbservable<bool>^ Any(
    IQbservable<TSource>^ source, 
    Expression<Func<TSource, bool>^>^ predicate
)
static member Any : 
        source:IQbservable<'TSource> * 
        predicate:Expression<Func<'TSource, bool>> -> IQbservable<bool> 
JScript does not support generic types and methods.

Type Parameters

  • TSource
    The type of source.

Parameters

Return Value

Type: System.Reactive.Linq.IQbservable<Boolean>
True if all elements of a queryable observable sequence satisfies a condition; otherwise, false.

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

Any Overload

System.Reactive.Linq Namespace