public ActionResult Create(mst_tour mst_tour)
        {
            if (ModelState.IsValid)
            {
                db.mst_tour.AddObject(mst_tour);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(mst_tour);
        }
 public ActionResult Edit(mst_tour mst_tour)
 {
     if (ModelState.IsValid)
     {
         db.mst_tour.Attach(mst_tour);
         db.ObjectStateManager.ChangeObjectState(mst_tour, EntityState.Modified);
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(mst_tour);
 }