roomtypeaccessor.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 DBaoBookingManagement.Entity;

namespace DBaoBookingManagement.DataAccess
{
    /// <summary>
    /// 对RoomType进行操作的类
    /// </summary>
    public class RoomTypeAccessor:DataAccessor
    {
        //根据房间类型ID查询房间类型
        public DataTable QueryById(int id)
        {
            string sql = "select * from RoomType where TypeId=" + id;
            try
            {
                return base.Query(sql);
            }
            catch (Exception ex)
            {
                throw new Exception("根据房间类型ID查询房间类型时出现错误：" + ex.Message);
            }
        }

        //根据房间类型名称查询房间类型
        public DataTable QueryByTypeName(string typeName)
        {
            string sql = "select * from RoomType where TypeName='" + typeName + "'";
            try
            {
                return base.Query(sql);
            }
            catch (Exception ex)
            {
                throw new Exception("根据房间类型名称查询房间类型时出现错误：" + ex.Message);
            }
        }

        //查询所有房间类型
        public DataTable QueryAll()
        {
            string sql = "select * from RoomType";
            try
            {
                return base.Query(sql);
            }
            catch (Exception ex)
            {
                throw new Exception("查询所有房间类型时出现错误：" + ex.Message);
            }
        }

        //插入房间类型
        public bool Insert(RoomType entity)
        {
            string typeName = entity.TypeName;
            string sql = "insert into RoomType(TypeName) values('" + typeName + "')";
            try
            {
                return base.ExecuteSqlNoneQuery(sql);
            }
            catch (Exception ex)
            {
                throw new Exception("插入房间类型时出现错误：" + ex.Message);
            }
        }

        //修改房间类型
        public bool Update(RoomType entity)
        {
            int id = entity.TypeId;
            string typeName = entity.TypeName;
            string sql = "update RoomType set TypeName='" + typeName + "' where TypeId="+id;
            try
            {
                return base.ExecuteSqlNoneQuery(sql);
            }
            catch (Exception ex)
            {
                throw new Exception("修改房间类型时出现错误：" + ex.Message);
            }
        }

        //根据房间类型ID删除房间类型
        public bool DeleteById(int id)
        {
            string sql = "delete RoomType where TypeId=" + id;
            try
            {
                return base.ExecuteSqlNoneQuery(sql);
            }
            catch (Exception ex)
            {
                throw new Exception("根据房间类型ID删除房间类型时出现错误：" + ex.Message);
            }
        }
    }
}