public ActionResult <ReturnMessage> SendThirdRequest(SecondAndThirdRequest thirdRequest)
        {
            ReturnMessage returnMessage = new ReturnMessage();

            try
            {
                messageService.SendThirdRequest(thirdRequest);
            }
            catch (Exception ex)
            {
                returnMessage.Ret = ex.InnerException.Message;
                return(returnMessage);
            }
            returnMessage.Ret = "successfully";
            return(returnMessage);
        }
        public void SendSecondRequest(SecondAndThirdRequest secondRequest)
        {
            Message newMessage = new Message();

            newMessage.Applicant    = secondRequest.Applicant;
            newMessage.Recipient    = secondRequest.Recipient;
            newMessage.SupplyId     = secondRequest.SupplyId;
            newMessage.NeedId       = secondRequest.NeedId;
            newMessage.Time         = secondRequest.Time;
            newMessage.MessageType  = "Second";
            newMessage.MeaasgeState = "N";
            newMessage.Items        = new List <Item>();
            for (int i = 0; i < secondRequest.Items.Count; i++)
            {
                newMessage.Items.Add(new Item());
            }
            for (int i = 0; i < secondRequest.Items.Count; i++)
            {
                newMessage.Items[i].ItemName  = secondRequest.Items[i].ItemName;
                newMessage.Items[i].ItemCount = secondRequest.Items[i].ItemCount;
            }

            platformContext.Messages.Add(newMessage);

            var query = platformContext.Messages.Include("Items").FirstOrDefault(p => p.MessageId == secondRequest.TargetMessageId);

            if (query != null)
            {
                query.MeaasgeState = "Y";
            }

            var query_supply = platformContext.Supplies.Include("Items").FirstOrDefault(p => p.SupplyId == secondRequest.SupplyId);

            if (query_supply != null)
            {
                for (int i = 0; i < secondRequest.Items.Count; i++)
                {
                    for (int j = 0; j < query_supply.Items.Count; j++)
                    {
                        if (query_supply.Items[j].Name == secondRequest.Items[i].ItemName)
                        {
                            query_supply.Items[j].Count = query_supply.Items[j].Count - secondRequest.Items[i].ItemCount;

                            break;
                        }
                    }
                }
            }
            for (int i = 0; i < secondRequest.Items.Count; i++)
            {
                Exchange exchange = new Exchange();
                exchange.Requestor  = secondRequest.Applicant;
                exchange.Supplicant = secondRequest.Recipient;
                exchange.NeedId     = secondRequest.NeedId;
                exchange.SupplyId   = secondRequest.SupplyId;
                exchange.ItemName   = secondRequest.Items[i].ItemName;
                exchange.ItemCount  = Convert.ToString(secondRequest.Items[i].ItemCount);
                exchange.Type       = "发货";
                exchange.Time       = secondRequest.Time;
                platformContext.Exchanges.Add(exchange);
            }
            platformContext.SaveChanges();
        }