public HttpResponseMessage RetailerUpdateProduct(tblProduct product, int productid, string remail)
 {
     try
     {
         var updateproduct = db.proc_UpdateProduct1(productid, remail, product.productprice, product.productquantity, product.productdescription);
         return(Request.CreateResponse(HttpStatusCode.OK, "valid"));
     }
     catch (Exception e)
     {
         return(Request.CreateResponse(HttpStatusCode.OK, "invalid"));
     }
 }