Te podría quedar mas o menos así.
Cita: Dim lbl As New Label
lbl.ID = "lbl1"
lbl.Text = "blabla"
Dim ddl1 As New DropDownList
ddl1.ID = "ddl1"
...
...
Dim ddl2 As New DropDownList
ddl2.ID = "ddl2"
...
...
cell.Controls.Add(lbl)
cell.Controls.Add(New LiteralControl("<br>"))
cell.Controls.Add(ddl1)
cell.Controls.Add(New LiteralControl("<br>"))
cell.Controls.Add(ddl2)
cell.Controls.Add(New LiteralControl("<br>"))
Saludos y espero te funcione...
