AdressOf method signature

Question

Since I can't put in parameters, how can I respect the following signature?

Private Sub SetFocusToRow(ByRef ultraGridRow As Infragistics.Win.UltraWinGrid.UltraGridRow)
    grdSoldeOuverture.ActiveCell = ultraGridRow.Cells(0)
    grdSoldeOuverture.PerformAction(Infragistics.Win.UltraWinGrid.UltraGridAction.EnterEditMode)
End Sub

When I call it like this

Me.BeginInvoke(New MethodInvoker(AddressOf Me.SetFocusToTemplateAddRow))

---

I'm on .NET 2.0 in Visual Studio 2005 with Microsoft Visual Basic 2005 so a lambda expression is not an option.

Answer 1

You can use a lambda to capture the requirements and pass them in:

Foo arg = GetTheFoo()

BeginInvoke(New MethodInvoker(Sub() SetFoo(arg)))

---

Edit:

First, change your method to not pass ByRef - this is unnecessary:

Private Sub SetFocusToRow(ByVal ultraGridRow As Infragistics.Win.UltraWinGrid.UltraGridRow)
    grdSoldeOuverture.ActiveCell = ultraGridRow.Cells(0)
    grdSoldeOuverture.PerformAction(Infragistics.Win.UltraWinGrid.UltraGridAction.EnterEditMode)
End Sub

Next, define a delegate:

' Define your delegate:
Delegate Sub SetFocusToRowDelegate(ByVal ultraGridRow As Infragistics.Win.UltraWinGrid.UltraGridRow)

Then you can call via:

BeginInvoke(new SetFocusToRowDelegate(AddressOf SetFocusToRow), arg)

Answer 2

Since lambdas cause a problem you could try implementing them manually using an object:

Class FooCurry

    Private bar as Foo

    Private Sub new (foo as Foo)
       bar = foo
    End Sub

    Public sub DoFoo()
       bar.SetFoo()
    EndSub
End Class

dim foocurry as new FooCurry(foo)
BeginInvoke(New MethodInvoker(AdressOf foocurry.DoFoo))

This is how lambdas are implemented under the hood, so this should work. You could generalise the object to take a delegate and use it in more places.