public ActionResult Create(Product product)
        {
            if (ModelState.IsValid)
            {
                db.Products.Add(product);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(product);
        }
        // PUT api/ProductInfoAPI/5
        public HttpResponseMessage PutProduct(int id, Product product)
        {
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            if (id != product.ProductId)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }

            product.CreatedBy = User.Identity.Name;
            db.Entry(product).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException ex)
            {
                return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
            }

            return Request.CreateResponse(HttpStatusCode.OK);
        }
 public ActionResult Edit(Product product)
 {
     if (ModelState.IsValid)
     {
         db.Entry(product).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(product);
 }
        // POST api/ProductInfoAPI
        public HttpResponseMessage PostProduct(Product product)
        {
            if (ModelState.IsValid)
            {
                product.CreatedBy = User.Identity.Name;
                db.Products.Add(product);
                db.SaveChanges();

                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, product);
                response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = product.ProductId }));
                return response;
            }
            else
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }
        }