Observable.FromEvent<TDelegate, TEventArgs> Method (Action<TDelegate>, Action<TDelegate>)
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 TDelegate, TEventArgs) ( _
addHandler As Action(Of TDelegate), _
removeHandler As Action(Of TDelegate) _
) As IObservable(Of TEventArgs)
'Usage
Dim addHandler As Action(Of TDelegate)
Dim removeHandler As Action(Of TDelegate)
Dim returnValue As IObservable(Of TEventArgs)
returnValue = Observable.FromEvent(addHandler, _
removeHandler)
public static IObservable<TEventArgs> FromEvent<TDelegate, TEventArgs>(
Action<TDelegate> addHandler,
Action<TDelegate> removeHandler
)
public:
generic<typename TDelegate, typename TEventArgs>
static IObservable<TEventArgs>^ FromEvent(
Action<TDelegate>^ addHandler,
Action<TDelegate>^ removeHandler
)
static member FromEvent :
addHandler:Action<'TDelegate> *
removeHandler:Action<'TDelegate> -> IObservable<'TEventArgs>
JScript does not support generic types and methods.
Type Parameters
- TDelegate
The type of delegate.
- TEventArgs
The type of event.
Parameters
- addHandler
Type: System.Action<TDelegate>
Action that attaches the given event handler to the underlying .NET event.
- removeHandler
Type: System.Action<TDelegate>
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.