F#/WPF event binding

Question

I am wandering if there is a way of hooking an event defined in XAML to a F# function of member ? Of course, I could do it diagrammatically but it is kind of inconvenient. <

Answer 1

It is possible to add binding to a command, eg. using the Command="..." property in the button.

So in you XAML you can have:

Then in your ViewModel code, if you have a member called MyCommandHandler, it'll be bound to the above button. So in your F#, something like:

module ViewModel =
    type FuncCommand (canExec:(obj -> bool), doExec:(obj -> unit)) =     
        let theEvent = new DelegateEvent()     
        interface ICommand with         
            []         
            member x.CanExecuteChanged = theEvent.Publish         
            member x.CanExecute arg = canExec(arg)         
            member x.Execute arg = doExec(arg)

    type MyViewModel() =
        member this.MyCommandHandler =          
            new FuncCommand(             
                (fun _ -> ... SOME CODE WHICH RETURNS TRUE OR FALSE ...),             
                (fun _ -> ... SOME CODE TO HANDLE THE CLICK ...)
            )