public void ConsultarSalas()
        {
            consu = new Consumo();
            List <Salas> sala = null;

            try
            {
                sala = consu.ConsultarSala().ToList();
                ViewState["Sala"] = sala;
                if (sala != null && sala.Count > 0)
                {
                    CmbSalas.DataSource = sala;
                    CmbSalas.ValueField = "IDSALA";
                    CmbSalas.TextField  = "DESCRIPCION";
                    CmbSalas.DataBind();
                }
            }catch (Exception ex)
            {
            }
        }