Metodo di estensione FindControl web ricorsivo

<Extension()> _

Public Function FindControlRecursive(ByVal container As Control, _

                                    ByVal controlID As String) As Control

  Dim ctrlRet As Control = Nothing

  If container IsNot Nothing Then

    ctrlRet = container.FindControl(controlID)

    If ctrlRet Is Nothing Then

      For Each ctrl As Control In container.Controls

        ctrlRet = ctrl.FindControlRecursive(controlID)

        If ctrlRet IsNot Nothing Then Exit For

      Next

    End If

  End If

  Return ctrlRet

End Function

public static Control FindControlRecursive(this Control container,

                                                String controlID)

{

  Control ctrlRet = null;

  if (container != null)

  {

    ctrlRet = container.FindControl(controlID);

    if (ctrlRet == null)

    {

      foreach (Control ctrl in container.Controls)

      {

        ctrlRet = ctrl.FindControlRecursive(controlID);

        if (ctrlRet != null) break;

      }

    }

  }

  return ctrlRet;

}