roombusiness.cs

本系统是基于三层架构和Ajax控件结合的酒店预订系统

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Reflection;
using DBaoBookingManagement.DataAccess;
using DBaoBookingManagement.Entity;

namespace DBaoBookingManagement.BusinessLogic
{
    /// <summary>
    /// 对Room表进行业务逻辑操作
    /// </summary>
    public class RoomBusiness : Business
    {
        private RoomAccessor ra = new RoomAccessor();

        private static RoomBusiness instance = null;
        private RoomBusiness() { }//私有构造函数

        /// <summary>
        /// 获取RoomBusiness对象
        /// </summary>
        /// <returns></returns>
        public static RoomBusiness GetInstance()
        {
            if (instance == null)
            {
                instance = new RoomBusiness();
            }
            return instance;
        }

        /// <summary>
        /// 根据房间ID查询房间
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public Room QueryById(int id)
        {
            Room entity = null;
            try
            {
                DataTable dt = ra.QueryById(id);
                if (dt.Rows.Count > 0)
                {
                    entity = new Room();
                    PropertyInfo[] props = typeof(Room).GetProperties();
                    for (int j = 0; j < props.Length; j++)
                    {
                        string columnName = props[j].Name;
                        object value = dt.Rows[0][columnName];
                        props[j].SetValue(entity, value, null);
                    }
                }
                return entity;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 根据酒店ID及到期时间查询空房
        /// </summary>
        /// <param name="hotelId"></param>
        /// <param name="endTime"></param>
        /// <returns></returns>
        public Room[] QueryNullRoomByHotelId(int hotelId, DateTime endTime)
        {
            Room[] entityList = null;
            try
            {
                DataTable dt = ra.QueryNullRoomByHotelId(hotelId, endTime);
                entityList = FillEntityList(entityList, dt);
                return entityList;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 根据酒店ID查询空房
        /// </summary>
        /// <param name="hotelId"></param>
        /// <returns></returns>
        public Room[] QueryRoomByHotelId(int hotelId)
        {
            Room[] entityList = null;
            try
            {
                DataTable dt = ra.QueryRoomByHotelId(hotelId);
                entityList = FillEntityList(entityList, dt);
                return entityList;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 增加房间
        /// </summary>
        /// <param name="roomNum"></param>
        /// <param name="endTime"></param>
        /// <param name="normalPrice"></param>
        /// <param name="dBaoPrice"></param>
        /// <param name="desciption"></param>
        /// <param name="roomTypeId"></param>
        /// <param name="hotelId"></param>
        /// <returns></returns>
        public bool Insert(string roomNum,DateTime endTime,double normalPrice,double dBaoPrice,
            string desciption,int roomTypeId,int hotelId)
        {
            Room entity = new Room();
            entity.RoomNum = roomNum;
            entity.EndTime = endTime;
            entity.NormalPrice = normalPrice;
            entity.DBaoPrice = dBaoPrice;
            entity.Desciption = desciption;
            entity.RoomTypeId = roomTypeId;
            entity.HotelId = hotelId;
            try
            {
                return ra.Insert(entity);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 修改房间
        /// </summary>
        /// <param name="id"></param>
        /// <param name="roomNum"></param>
        /// <param name="endTime"></param>
        /// <param name="normalPrice"></param>
        /// <param name="dBaoPrice"></param>
        /// <param name="desciption"></param>
        /// <param name="roomTypeId"></param>
        /// <param name="hotelId"></param>
        /// <returns></returns>
        public bool Update(int id, string roomNum, DateTime endTime, double normalPrice, double dBaoPrice,
            string desciption, int roomTypeId, int hotelId)
        {
            Room entity = new Room();
            entity.RoomId = id;
            entity.RoomNum = roomNum;
            entity.EndTime = endTime;
            entity.NormalPrice = normalPrice;
            entity.DBaoPrice = dBaoPrice;
            entity.Desciption = desciption;
            entity.RoomTypeId = roomTypeId;
            entity.HotelId = hotelId;
            try
            {
                return ra.Update(entity);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 根据房间ID删除房间
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public bool DeleteById(int id)
        {
            try
            {
                return ra.DeleteById(id);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        //填充实体类列表
        private Room[] FillEntityList(Room[] entityList, DataTable dt)
        {
            if (dt.Rows.Count > 0)
            {
                entityList = new Room[dt.Rows.Count];

                //用反射给实体类赋值
                for (int i = 0; i < entityList.Length; i++)
                {
                    Room entity = new Room();
                    PropertyInfo[] props = typeof(Room).GetProperties();
                    for (int j = 0; j < props.Length; j++)
                    {
                        string columnName = props[j].Name;
                        object value = dt.Rows[i][columnName];
                        props[j].SetValue(entity, value, null);
                    }
                    entityList[i] = entity;
                }
            }
            return entityList;
        }
    }
}