Question

I have a MyUserControl in which I have Button1 and Button2 buttons.

I need to “delegate” that button clicks to the MyUserControl’s Button1Click event and Button2Click event respectively.

Bellow is a stub I don’t really know finishing…

  Private WithEvents Button1 As Button
  Private WithEvents Button2 As Button

  Public Custom Event Button1Click As Eventhandler
    AddHandler(ByVal value As EventHandler)
      AddHandler Me.Button1.Click, value
    End AddHandler

    RemoveHandler(ByVal value As EventHandler)
      RemoveHandler Me.Button1.Click, value
    End RemoveHandler

    RaiseEvent(ByVal sender As Object, ByVal e As System.EventArgs)
      Me.Button1.Invoke(???)
    End RaiseEvent
  End Event

I wonder if I need the WithEvents in the buttons declaration, and how to achieve the RaiseEvent part…

Answer 1

If I understand your setup correct, you might want to just handle the events and pass them on to a custom event. Like this:

' This is defined in your control
Public Event Button1Click(ByVal sender As Object, ByVal e As EventArgs)

' Other stuff here

' This is the handler for the Button1.Click Event.
Public Sub Button1_Click(ByVal sender as Object, ByVal e As EventArgs) Handles Button1.Click
    ' Raise our custom event to the outside
    RaiseEvent Button1Click(Me, e)
End Sub

Edit:

What happens here is a simple relaying of events, it breaks the event-chain and fires it’s own event in between.

MyUserControl
 +-> Custom Event: Button1Click
 +-> Control: Button1

Now if Button1 gets clicked, the event chain is looking like this:

Button1.CLick() -> Calling EventHandlers
 +-> MyUserControl.Button1_Click(Object, EventArgs) -> Raises its own Event
      +-> Parent.MyUserControl_Button1Click(Object, EventArgs)
          ' Application Logic executes here