精简BLL业务层，使用范型复用常用方法

首先DALFactory，需要增加一个类DALFactory2.cs

//*--------------------------------------
//*  Create By Yesun .Net Tool V1.1
//*  CopyRight (C) yesun
//*  Email:edzh@tom.com QQ:363980
//*  Msn:dyesur@hotmail.com
//*  Web http://edzh.com
//*  DateTime 2006-6-2
//*--------------------------------------
using System;
using System.Reflection;
using System.Collections.Specialized;
using System.Configuration;
using Yesun.Edzh.IDAL;
namespace Yesun.Edzh.DALFactory
{
    /// <summary>
    /// 工厂类Admin 的摘要说明。
    /// web.config 需要加入配置：(利用工厂模式+反射机制+缓存机制,实现动态创建不同的数据层对象接口)
    /// DataCache类在导出代码的文件夹里
    /// 可以把所有DAL类的创建放在这个DataAccess类里
    /// <appSettings>
    /// <add key="DAL" value="CMS.DAL" /> DAL路径，(这里的命名空间根据实际情况更改为自己项目的命名空间)
    /// </appSettings>
    /// </summary>
    public sealed class DataAccess2<T>
    {
        private static readonly string path = ConfigurationManager.AppSettings["DAL"];

        /// <summary>
        /// 创建对象或从缓存获取
        /// </summary>
        public static object CreateObject(string path, string CacheKey)
        {
            System.Web.Caching.Cache objCache = System.Web.HttpRuntime.Cache;
            object objType = objCache[CacheKey];
            if (objType == null)
            {
                try
                {
                    objType = Assembly.Load(path).CreateInstance(CacheKey);
                    objCache.Insert(CacheKey, objType);// 写入缓存
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
            return objType;
        }
        /// <summary>
        /// 创建数据层接口
        /// </summary>
        public static IDAL<T> CreateDAL()
        {
            string className = typeof(T).ToString();
            className = className.Substring(className.LastIndexOf(".") + 1);
            string CacheKey = path + "." + className;
            object objType = CreateObject(path, CacheKey);
            return (IDAL<T>)objType;
        }
    }
}

 然后再BLL层，需要增加一个基类BaseBLL.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Yesun.Edzh.BLL
{
    /// <summary>
    /// 业务层常用方法
    /// </summary>
    public class BaseBLL<T>
    {
        private static readonly Yesun.Edzh.IDAL.IDAL<T> dal = Yesun.Edzh.DALFactory.DataAccess2<T>.CreateDAL();

        /// <summary>
        /// 增加一条数据
        /// </summary>
        public bool Save(T t)
        {
            return dal.Save(t);
        }

        /// <summary>
        /// 修改一条数据
        /// </summary>
        public bool Update(T t)
        {
            return dal.Update(t);
        }

        /// <summary>
        /// 取得对象实体
        /// </summary>
        public T GetModel(Guid id)
        {
            return dal.GetModel(id);
        }

        /// <summary>
        /// 取得对象实体
        /// </summary>
        public T GetModel(string id)
        {
            return dal.GetModel(new Guid(id));
        }

        /// <summary>
        /// 取得数据列表
        /// </summary>
        public Yesun.Edzh.Model.SqlPage<T> GetList()
        {
            return this.GetList(1, -1);
        }

        /// <summary>
        /// 取得数据列表
        /// </summary>
        public Yesun.Edzh.Model.SqlPage<T> GetList(int pageid, int pagesize)
        {
            return this.GetList(pageid, pagesize, "");
        }

        /// <summary>
        /// 取得数据列表
        /// </summary>
        public Yesun.Edzh.Model.SqlPage<T> GetList(int pageid, int pagesize, string where)
        {
            return this.GetList(pageid, pagesize, where, "");
        }

        /// <summary>
        /// 取得数据列表
        /// </summary>
        public Yesun.Edzh.Model.SqlPage<T> GetList(int pageid, int pagesize, string where, string sort)
        {
            return this.GetList(pageid, pagesize, where, sort, "");
        }

        /// <summary>
        /// 取得数据列表
        /// </summary>
        public Yesun.Edzh.Model.SqlPage<T> GetList(int pageid, int pagesize, string where, string sort, string fields)
        {
            return this.GetList(pageid, pagesize, where, sort, fields, "");
        }

        /// <summary>
        /// 取得数据列表
        /// </summary>
        public Yesun.Edzh.Model.SqlPage<T> GetList(int pageid, int pagesize, string where, string sort, string fields, string pk)
        {
            return dal.GetList(pk, fields, sort, where, pageid, pagesize);
        }

        /// <summary>
        /// 删除N条数据
        /// </summary>
        public bool Delete(string delid)
        {
            return dal.Delete(delid);
        }

        /// <summary>
        /// 按条件统计
        /// </summary>
        public long GetCount(string where)
        {
            return dal.GetCount(where);
        }

        /// <summary>
        /// 按条件判断是否重复
        /// </summary>
        public bool IsExsit(string where)
        {
            return dal.IsExsit(where);
        }

    }
}

 接下来BLL层的普通类只需要基层BaseBLL即可，支持扩充方法

//*--------------------------------------
//*  Create By Yesun .Net Tool V1.1
//*  CopyRight (C) yesun
//*  Email:edzh@tom.com QQ:363980
//*  Msn:dyesur@hotmail.com
//*  Web http://edzh.com
//*  DateTime 2006-10-11
//*--------------------------------------
using System;
using System.Data;
using System.Collections;
using System.Text;
using System.Data.SqlClient;
using Yesun.Edzh.Model;
using Yesun.Edzh.IDAL;
using Yesun.Edzh.DALFactory;

namespace Yesun.Edzh.BLL
{
 /// <summary>
 /// 逻辑业务层 Admin
 /// </summary>
 public class AdminService : BaseBLL<Yesun.Edzh.Model.Admin>
 {
        private static readonly IAdmin dal = DataAccess.CreateAdmin();

        #region 业务层扩充方法

        /// <summary>
        /// 得到一个对象实体
        /// </summary>
        /// <param name="username"></param>
        /// <returns></returns>
        public Yesun.Edzh.Model.Admin GetModelByUserName(string username)
        {
            return dal.GetModelByUserName(username);
        }

        /// <summary>
        /// 通过用户id取得属于该用户的权限
        /// </summary>
        /// <param name="userid"></param>
        /// <returns></returns>
        public Hashtable GetPermissionByUserId(Guid userid)
        {
            Hashtable htPermisstion = new Hashtable();
            SqlPage<Yesun.Edzh.Model.Permission> sqlpage = new PermissionService().GetList(1,-1,"id IN(select permissionid from cms_role_permission where roleid IN(select roleid from cms_user_role where userid='" + userid + "'))");
            foreach (Yesun.Edzh.Model.Permission permission in sqlpage)
            {
                if(permission == null) continue;
                if (permission.PermissionName != "")
                {
                    htPermisstion.Add((object)(permission.PermissionName + "" + permission.Operate), (object)(permission.PermissionName + "" + permission.Operate));
                }
            }
            return htPermisstion;
        }

        #endregion
    }
}

思路基本上和上次DAL,IDAL这两个层差不多，稍作变化而已！