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Description
I'm trying to convert GlobalSystemMediaTransportControlsSession.MediaPropertiesChanged
to IObservable. However, it delegates a TypedEventHandler
, not EventArgs
, so a conversion
is needed and ...
let conversion (handler: EventHandler<_>) : Windows.Foundation.TypedEventHandler<_, _> =
Windows.Foundation.TypedEventHandler(fun s e -> handler.Invoke(s, e))
Observable.fromEventConversionOn
Scheduler.Scheduler.EventLoop
conversion
session.add_MediaPropertiesChanged
session.remove_MediaPropertiesChanged
// Following doesn't compile
Observable.fromEventConversion
conversion
session.add_MediaPropertiesChanged
session.remove_MediaPropertiesChanged
In decompiler:
I also wonder if there is better solution (for TypedEventHandler
), Observable.fromEventGeneric
doesn't work.
Type constraint mismatch. The type ''a -> unit' is not compatible with type 'Windows.Foundation.TypedEventHandler<GlobalSystemMediaTransportControlsSession,MediaPropertiesChangedEventArgs>'
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