partial void DeleteGift(Gift instance);
 partial void InsertGift(Gift instance);
 partial void UpdateGift(Gift instance);
 public int Insert(GiftModelShow item, HttpPostedFileBase file, string vid, HttpServerUtilityBase Server)
 {
     var Picture = "";
     s26webDataContext db = new s26webDataContext();
     if (file != null)
         if (file.ContentLength > 0 && file.ContentType.ToLower() == "image/jpeg" || file.ContentType == "image/png")
             Picture = Method.Upload_File(file, vid, Server);
         else
             Picture = "";
     try
     {
         Gift new_item = new Gift
         {
             MemberType = item.MemberType,
             Name = item.Name,
             Point = item.Point,
             Amount = item.Amount,
             Picture = Picture,
             Display = item.Display,
             CreateTime = DateTime.UtcNow
         };
         db.Gift.InsertOnSubmit(new_item);
         db.SubmitChanges();
         db.Connection.Close();
         return new_item.Id;
     }
     catch
     {
         return -1;
     }
 }