public ActionResult DeleteConfirmed(int?idCongreso, int?idStand, int?idEmpresa)
        {
            Congress_Enterprise congress_Enterprise = db.Tb_Congress_Enterprise.Where(x => x.StandId == idStand && x.CongressId == idCongreso && x.EnterpriseId == idEmpresa).FirstOrDefault();

            db.Tb_Congress_Enterprise.Remove(congress_Enterprise);
            db.SaveChanges();
            return(RedirectToAction("Index"));
        }
        // GET: Congress_Enterprise/Delete/5
        public ActionResult Delete(int?idCongreso, int?idStand, int?idEmpresa)
        {
            if (idCongreso == null && idStand == null && idEmpresa == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            Congress_Enterprise congress_Enterprise = db.Tb_Congress_Enterprise.Where(x => x.StandId == idStand && x.CongressId == idCongreso && x.EnterpriseId == idEmpresa).FirstOrDefault();

            if (congress_Enterprise == null)
            {
                return(HttpNotFound());
            }
            return(View(congress_Enterprise));
        }
        public ActionResult Create([Bind(Include = "CongressId,EnterpriseId,StandId")] Congress_Enterprise congress_Enterprise)
        {
            if (ModelState.IsValid)
            {
                db.Tb_Congress_Enterprise.Add(congress_Enterprise);
                db.SaveChanges();
                return(RedirectToAction("Index"));
            }

            ViewBag.CongressId   = new SelectList(db.Tb_Congress, "CongressId", "CongressName", congress_Enterprise.CongressId);
            ViewBag.EnterpriseId = new SelectList(db.Tb_Enterprise, "EnterpriseId", "EnterpriseName", congress_Enterprise.EnterpriseId);
            ViewBag.StandId      = new SelectList(db.Tb_Stand, "Stand_id", "StandName", congress_Enterprise.StandId);
            return(View(congress_Enterprise));
        }