Filhantera i datagrid - laddar inte om!?

Jag har hittat ett fint script som bygger en datagrid från filer i en mapp - det fungerar utmärkt men...

... när man har tryckt på delete så måste man ladda om sidan manuellt för att se resultatet. Vad är det jag glömt?

<%@ Import Namespace="System.IO" %>
<script language="VB" runat="server">
  Sub Page_Load(sender as Object, e as EventArgs)
    If Not Page.IsPostBack then
      Dim dirInfo as New DirectoryInfo(Server.MapPath(""))
      articleList.DataSource = dirInfo.GetFiles("*.pdf")
      articleList.DataBind()
    End If
  End Sub
  Sub articleList_ItemDataBound(sender as Object, e as DataGridItemEventArgs)
    ' First, make sure we're NOT dealing with a Header or Footer row
    If e.Item.ItemType <> ListItemType.Header AND _
         e.Item.ItemType <> ListItemType.Footer then
      'Now, reference the Button control that the Delete ButtonColumn 
      'has been rendered to
      Dim deleteButton as Button = e.Item.Cells(0).Controls(0)

      'We can now add the onclick event handler
      deleteButton.Attributes("onclick") = "javascript:return " & _
                 "confirm('Are you sure you want to delete the file " & _
                 DataBinder.Eval(e.Item.DataItem, "Name") & "?')"    
    End If
  End Sub
  Sub articleList_DeleteFile(sender as Object, e as DataGridCommandEventArgs)
    'First, get the filename to delete
    Dim fileName as String = articleList.DataKeys(e.Item.ItemIndex)
	File.Delete(fileName)

    'lblMessage.Text = "You opted to delete the file " & _
        'fileName & ".<br />" & _
        '"This file could be deleted by calling: " & _
        '"<code>File.Delete(fileName)</code><p>"
    
    'You would want to rebind the Directory's files to the DataGrid after
    'deleting the file...
  End Sub
</script>

:D Nicklas