Observable.All<TSource> Method
Determines whether all elements of an observable sequence satisfies a condition.
Namespace: System.Reactive.Linq
Assembly: System.Reactive (in System.Reactive.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function All(Of TSource) ( _
source As IObservable(Of TSource), _
predicate As Func(Of TSource, Boolean) _
) As IObservable(Of Boolean)
'Usage
Dim source As IObservable(Of TSource)
Dim predicate As Func(Of TSource, Boolean)
Dim returnValue As IObservable(Of Boolean)
returnValue = source.All(predicate)
public static IObservable<bool> All<TSource>(
this IObservable<TSource> source,
Func<TSource, bool> predicate
)
[ExtensionAttribute]
public:
generic<typename TSource>
static IObservable<bool>^ All(
IObservable<TSource>^ source,
Func<TSource, bool>^ predicate
)
static member All :
source:IObservable<'TSource> *
predicate:Func<'TSource, bool> -> IObservable<bool>
JScript does not support generic types and methods.
Type Parameters
- TSource
The type of source.
Parameters
- source
Type: System.IObservable<TSource>
An observable sequence whose elements to apply the predicate to.
- predicate
Type: System.Func<TSource, Boolean>
A function to test each element for a condition.
Return Value
Type: System.IObservable<Boolean>
True if all elements of an 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 IObservable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .