protected void ddlNumeroRack_SelectedIndexChanged(object sender, EventArgs e)
        {
            //hacer diferencia de pisos posibles
            lblID.Text = txtCodigoPallet.Text;
            string Bodega = ddlBodega.SelectedItem.ToString();

            if (ddlNumeroRack.SelectedItem.ToString() != "Seleccionar")
            {
                string rack   = "";
                int    Rack   = Convert.ToInt32(ddlNumeroRack.SelectedItem.ToString());
                int    NNivel = wipControl.CantidadNivelRack(ddlBodega.SelectedItem.ToString());
                for (int i = NNivel; i >= 1; i--)
                {
                    rack = rack + wipControl.UbicacionRack_Libre(Bodega, Rack, txtCodigoPallet.Text, i);
                    divGuardar.Visible = true;
                }
                RackUbicacion.Text    = rack;//ubicacion piso 2
                RackUbicacion.Visible = true;
            }
            else
            {
                RackUbicacion.Visible = false;
                divGuardar.Visible    = false;
                Label10.Visible       = false;
            }
        }