public ActionResult Edit(客戶聯絡人 客戶聯絡人)
 {
     if (ModelState.IsValid)
     {
         db.Entry(客戶聯絡人).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Details", "客戶", new { id = 客戶聯絡人.客戶Id });
     }
     ViewBag.客戶Id = new SelectList(db.客戶資料, "Id", "客戶名稱", 客戶聯絡人.客戶Id);
     return View(客戶聯絡人);
 }
        public ActionResult Create(客戶聯絡人 客戶聯絡人)
        {
            if (ModelState.IsValid)
            {
                db.客戶聯絡人.Add(客戶聯絡人);
                db.SaveChanges();
                //return RedirectToAction("Index");
                return RedirectToAction("Details", "客戶", new { id = 客戶聯絡人.客戶Id });
            }

            var 客戶 = db.客戶資料.Find(客戶聯絡人.客戶Id);
            ViewBag.客戶Id = 客戶聯絡人.客戶Id;
            ViewBag.客戶名稱 = 客戶.客戶名稱;
            return View(客戶聯絡人);
            //ViewBag.客戶Id = new SelectList(db.客戶, "Id", "客戶名稱", 客戶聯絡人.客戶Id);

            //return RedirectToAction("Details", "客戶", new { id = 客戶聯絡人.客戶Id });
        }