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
- source
Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence whose elements to apply the predicate to.
- predicate
Type: System.Linq.Expressions.Expression<Func<TSource, Boolean>>
A function to test each element for a condition.
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 .