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Event.merge<'Del1,'T,'Del2> Function (F#)

Den Delimarsky|Last Updated: 8/18/2017
1 Contributor

Fires the output event when either of the input events fire.

Namespace/Module Path: Microsoft.FSharp.Control.Event

Assembly: FSharp.Core (in FSharp.Core.dll)


// Signature:
Event.merge : IEvent<'Del1,'T> -> IEvent<'Del2,'T> -> IEvent<'T> (requires delegate and delegate)

// Usage:
Event.merge event1 event2


event1 Type: IEvent<'Del1,'T>

The first input event.

event2 Type: IEvent<'Del2,'T>

The second input event.

Return Value

An event that fires when either of the input events fire.


This function is named Merge in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.


let form = new Form(Text = "F# Windows Form",
                    Visible = true,
                    TopMost = true)
    |> Event.merge(form.MouseDoubleClick)
    |> Event.add ( fun evArgs ->
        form.BackColor <- System.Drawing.Color.FromArgb(
            evArgs.X, evArgs.Y, evArgs.X ^^^ evArgs.Y) )


Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2

Version Information

F# Core Library Versions

Supported in: 2.0, 4.0, Portable

See Also

Control.Event Module (F#)

Microsoft.FSharp.Control Namespace (F#)

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