Observable.FromEventPattern<TDelegate, TEventArgs> Method (Func<EventHandler<TEventArgs>, TDelegate>, Action<TDelegate>, Action<TDelegate>)
Converts a .NET event, conforming to the standard .NET event pattern, to an observable sequence with the specified conversion, add handler and remove handler.
Namespace: System.Reactive.Linq
Assembly: System.Reactive (in System.Reactive.dll)
Syntax
'Declaration
Public Shared Function FromEventPattern(Of TDelegate, TEventArgs As EventArgs) ( _
conversion As Func(Of EventHandler(Of TEventArgs), TDelegate), _
addHandler As Action(Of TDelegate), _
removeHandler As Action(Of TDelegate) _
) As IObservable(Of EventPattern(Of TEventArgs))
'Usage
Dim conversion As Func(Of EventHandler(Of TEventArgs), TDelegate)
Dim addHandler As Action(Of TDelegate)
Dim removeHandler As Action(Of TDelegate)
Dim returnValue As IObservable(Of EventPattern(Of TEventArgs))
returnValue = Observable.FromEventPattern(conversion, _
addHandler, removeHandler)
public static IObservable<EventPattern<TEventArgs>> FromEventPattern<TDelegate, TEventArgs>(
Func<EventHandler<TEventArgs>, TDelegate> conversion,
Action<TDelegate> addHandler,
Action<TDelegate> removeHandler
)
where TEventArgs : EventArgs
public:
generic<typename TDelegate, typename TEventArgs>
where TEventArgs : EventArgs
static IObservable<EventPattern<TEventArgs>^>^ FromEventPattern(
Func<EventHandler<TEventArgs>^, TDelegate>^ conversion,
Action<TDelegate>^ addHandler,
Action<TDelegate>^ removeHandler
)
static member FromEventPattern :
conversion:Func<EventHandler<'TEventArgs>, 'TDelegate> *
addHandler:Action<'TDelegate> *
removeHandler:Action<'TDelegate> -> IObservable<EventPattern<'TEventArgs>> when 'TEventArgs : EventArgs
JScript does not support generic types and methods.
Type Parameters
- TDelegate
The type of delegate.
- TEventArgs
The type of event.
Parameters
- conversion
Type: System.Func<EventHandler<TEventArgs>, TDelegate>
A function used to convert the given event handler to a delegate compatible with the underlying .NET event.
- addHandler
Type: System.Action<TDelegate>
The action that attaches the given event handler to the underlying .NET event.
- removeHandler
Type: System.Action<TDelegate>
The action that detaches the given event handler from the underlying .NET event.
Return Value
Type: System.IObservable<EventPattern<TEventArgs>>
The observable sequence that contains data representations of invocations of the underlying .NET event.