public ActionResult Edit(string id, AReg reg)
 {
     try
     {
         if (ModelState.IsValid)
         {
             BTourGuideOp tourOp = new BTourGuideOp();
             reg.RegID = id;
             tourOp.EditReg(reg);
             return RedirectToAction("Index");
         }
         else
             return View(reg);
     }
     catch(Exception e)
     {
         TempData["EditException"] = "Error in Reg edit: " + e.Message;
         return View(reg);
     }
 }