adminbusiness.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Admin表进行业务逻辑操作
    /// </summary>
    public class AdminBusiness : Business
    {
        private AdminAccessor aa = new AdminAccessor();

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

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

        /// <summary>
        /// 登录，成功返回管理员对象，失败返回null
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="pwd"></param>
        /// <returns></returns>
        public Admin Login(string userName, string pwd)
        {
            Admin entity = null;
            try
            {
                DataTable dt = aa.Login(userName, pwd);
                if (dt.Rows.Count > 0)
                {
                    entity = new Admin();
                    PropertyInfo[] props = typeof(Admin).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>
        /// 根据管理员ID查询管理员
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public Admin QueryAdminById(int id)
        {
            Admin entity = null;
            try
            {
                DataTable dt = aa.QueryAdminById(id);
                if (dt.Rows.Count > 0)
                {
                    entity = new Admin();
                    PropertyInfo[] props = typeof(Admin).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>
        /// 根据用户名查询管理员
        /// </summary>
        /// <param name="userName"></param>
        /// <returns></returns>
        public Admin QueryAdminByUserName(string userName)
        {
            Admin entity = null;
            try
            {
                DataTable dt = aa.QueryAdminByUserName(userName);
                if (dt.Rows.Count > 0)
                {
                    entity = new Admin();
                    PropertyInfo[] props = typeof(Admin).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>
        /// 查询所有管理员
        /// </summary>
        /// <returns></returns>
        public Admin[] QueryAll()
        {
            Admin[] entityList = null;
            try
            {
                DataTable dt = aa.QueryAll();
                entityList = FillEntityList(entityList, dt);
                return entityList;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 根据管理员ID删除管理员
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public bool DeleteById(int id)
        {
            try
            {
                return aa.DeleteById(id);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 插入管理员
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="pwd"></param>
        /// <param name="realName"></param>
        /// <param name="accessId"></param>
        /// <returns></returns>
        public bool Insert(string userName,string pwd,string realName,int accessId)
        {
            Admin entity = new Admin();
            entity.UserName = userName;
            entity.Pwd = pwd;
            entity.RealName = realName;
            entity.AccessId = accessId;
            try
            {
                return aa.Insert(entity);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 修改管理员信息
        /// </summary>
        /// <param name="id"></param>
        /// <param name="userName"></param>
        /// <param name="pwd"></param>
        /// <param name="realName"></param>
        /// <param name="accessId"></param>
        /// <returns></returns>
        public bool Update(int id,string userName,string pwd,string realName,int accessId)
        {
            Admin entity = new Admin();
            entity.AdminId = id;
            entity.UserName = userName;
            entity.Pwd = pwd;
            entity.RealName = realName;
            entity.AccessId = accessId;
            try
            {
                return aa.Update(entity);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

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

                //用反射给实体类赋值
                for (int i = 0; i < entityList.Length; i++)
                {
                    Admin entity = new Admin();
                    PropertyInfo[] props = typeof(Admin).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;
        }
    }
}