Observable.FromEvent<TEventArgs> Method (Action<Action<TEventArgs>>, Action<Action<TEventArgs>>)
Converts a .NET event to an observable sequence.
Namespace: System.Reactive.Linq
Assembly: System.Reactive (in System.Reactive.dll)
Syntax
'Declaration
Public Shared Function FromEvent(Of TEventArgs) ( _
addHandler As Action(Of Action(Of TEventArgs)), _
removeHandler As Action(Of Action(Of TEventArgs)) _
) As IObservable(Of TEventArgs)
'Usage
Dim addHandler As Action(Of Action(Of TEventArgs))
Dim removeHandler As Action(Of Action(Of TEventArgs))
Dim returnValue As IObservable(Of TEventArgs)
returnValue = Observable.FromEvent(addHandler, _
removeHandler)
public static IObservable<TEventArgs> FromEvent<TEventArgs>(
Action<Action<TEventArgs>> addHandler,
Action<Action<TEventArgs>> removeHandler
)
public:
generic<typename TEventArgs>
static IObservable<TEventArgs>^ FromEvent(
Action<Action<TEventArgs>^>^ addHandler,
Action<Action<TEventArgs>^>^ removeHandler
)
static member FromEvent :
addHandler:Action<Action<'TEventArgs>> *
removeHandler:Action<Action<'TEventArgs>> -> IObservable<'TEventArgs>
JScript does not support generic types and methods.
Type Parameters
- TEventArgs
The type of event.
Parameters
- addHandler
Type: System.Action<Action<TEventArgs>>
Action that attaches the given event handler to the underlying .NET event.
- removeHandler
Type: System.Action<Action<TEventArgs>>
Action that detaches the given event handler from the underlying .NET event.
Return Value
Type: System.IObservable<TEventArgs>
Observable sequence that contains data representations of invocations of the underlying .NET event.