public string StockIn(int quantity, int itemId, int companyId)
        {
            StockManageGateway stockManageGateway = new StockManageGateway();
            int row = stockManageGateway.StockIn(quantity, itemId, companyId);

            if (row > 0)
            {
                return("Updated");
            }
            else
            {
                return("Failure");
            }
        }
        public string StockOutCondition(ItemOut itemOut)
        {
            StockManageGateway stockManageGateway = new StockManageGateway();
            int row = stockManageGateway.StockOutCondition(itemOut);

            if (row > 0)
            {
                return("Updated");
            }
            else
            {
                return("Failure");
            }
        }
        public string StockOut(int quantity, string itemName, string companyName)
        {
            StockManageGateway stockManageGateway = new StockManageGateway();
            int row = stockManageGateway.StockOut(quantity, itemName, companyName);

            if (row > 0)
            {
                return("Updated");
            }
            else
            {
                return("Failure");
            }
        }
        public List <Item> GetSalesItems(string fromDate, string toDate)
        {
            StockManageGateway stockManageGateway = new StockManageGateway();

            return(stockManageGateway.GetSalesItems(fromDate, toDate));
        }