[RESOLVED] Is therea way to handle events in a sorted list?

[ThatSamiam]

Hi,

Suppose I have this class which can raise an event:

Public Class eRaiser
  Event sendInfo(ByVal info As String)

  Public Sub InfoEventRaiser(ByVal info As String)
    RaiseEvent sendInfo(info)
  End Sub
End Class

If I have one of these, I can make an event handler:

  Public WithEvents er As New eRaiser
  Sub erHandler(ByVal info As String) Handles er.sendInfo

  End Sub

Now, let's suppose I need to have a sorted list of these:

 Public WithEvents ers As New SortedList(Of Integer, eRaiser)

Is there a way to reference the event individually or collectively?

Sub ersHandler(ByVal info As String) Handles ers???

Thanks

[techgnome]

You would need to use AddHandler to wire up the event to the eventhandler at run time when you create the eRaiser object and add it to your list.

Sub ersHandler(ByVal info As String) 'No handles

... do your thing ...

Sub AddNeweRaiser()

  dim er as new eRaiser
  AddHandler er.sendInfo, AddressOf ersHAndler
  ers.Add(ers.count +1, er)

end sub

Something along those lines... you create the individual object, wire it up to your handler, then add it to your list.

-tg

[Gruff]

I would make the SortedList part of the class and pass into an event so it could be consumed when the event is called.

[ThatSamiam]

Wow. Two very fast replies, thanks.

Could you also suggest a way that the handler would know which er (key) raised the event?

Thanks

[techgnome]

Well if you follow the standard convention of sender, eventargs... then it would be easy...

Public Class eRaiser
  public class eRaiserEventArg
        inherits SystemEventArgs 'I think that's right.

    public property Info as string

  end class

  Event sendInfo(ByVal sender as object, ByVal e As eRaiserEventArg) '

  Public Sub InfoEventRaiser(ByVal info As String)
    Dim evtArg as new eRaiserEventArg with {.Info = info}
    RaiseEvent sendInfo(me, evtArg)
  End Sub

Then your handler stub looks like this:

Sub ersHandler(byval sender as object, byval e as eRaiserEventArg)
'Now Sender is the object that riased the event

Should all look somewhat familiar as it's the same pattern nearly every control and object follows.

-tg

[ThatSamiam]

Thanks for the help - and for setting me straight on the wisdom of using standard arguments sender and e.