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Implementing a .NET interface that includes an event
f#.net

Hi All

I'm trying to implement the interface System.Windows.Input.ICommand in an F# type, but Im stuck with the CanExecuteChanged event handler that I need to implement.

I've tried Event<_> and DelegateEvent<System.EventHandler> and other combinations, but to no effect.

Does anyone know how to do this ?

Thanks

Dean

.

Something like this?

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type MyCommand () =
    let cecEvent = new DelegateEvent<System.EventHandler>()
    interface System.Windows.Input.ICommand with
        [<CLIEvent>]
        member this.CanExecuteChanged = cecEvent.Publish
        member this.CanExecute arg = true
        member this.Execute arg = ()

See: [link:msdn.microsoft.com]

By on 4/9/2010 4:45 AM ()

cant format code :(

By on 4/9/2010 6:00 AM ()

See [link:cs.hubfs.net]

By on 4/9/2010 7:07 AM ()

cant format code ....??

By on 4/9/2010 5:47 AM ()

Wow - thats great !!! - Thanks

I was soo close

type FuncCommand() =

let evt = new Event<EventHandler,EventArgs>()

interface ICommand with

override x.CanExecute(o:Object) = true

override x.Execute(o:Object) = ()

[<CLIEvent>]

member x.CanExecuteChanged = evt.Publish

By on 4/9/2010 5:45 AM ()

Ahh - got my HubFs editor working (was not in compatibily mode in IE8)

This is where I got to (see below) - I wasnt far off, but thanks for a perfect solution

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type FuncCommand() = 
    let evt = new Event<EventHandler,EventArgs>()
    interface ICommand with
        override x.CanExecute(o:Object) = true
        override x.Execute(o:Object) = ()
    [<CLIEvent>]
    member x.CanExecuteChanged = evt.Publish
By on 4/9/2010 11:14 AM ()

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