個人不善于表達(dá) 思路見于代碼 [歡迎大神拍磚批評指點(diǎn)]

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Configuration; using System.Reflection;namespace SelfToolsHelper {public interface Ilog{void CreateLog();}public class EventLog : Ilog{public void CreateLog(){Console.Write("Create EventLog");}}public class TxtLog : Ilog{public void CreateLog(){Console.Write("createTxtLog");}}public class DiskLog : Ilog{public void CreateLog(){Console.Write("Create DiskLog");}}public interface IFactory{Ilog CreateLogFactory();}public class EventFactory : IFactory{public Ilog CreateLogFactory(){return new EventLog();}}public class TexFactory : IFactory{public Ilog CreateLogFactory(){return new TxtLog();}}public class DiskFactory : IFactory{public Ilog CreateLogFactory(){return new DiskLog();}}//思考 要是有1w個 log 那 我要建立兩萬個class (log and factory) ，多付出1w的工作量。//是否可以優(yōu)化我的factory方法？public class FactoryNew<T>{public object CreateLogInstance(){return Activator.CreateInstance<T>();}}

public class FactoryTEST{public void TEST(){IFactory factory = new DiskFactory();Ilog log = factory.CreateLogFactory();log.CreateLog();//面向接口抽象，打印出：Create DiskLog }public void TestNew(){FactoryNew<EventLog> eventfact =new FactoryNew<EventLog> ();Ilog log = eventfact.CreateLogInstance() as EventLog;log.CreateLog();}public void TestNewSecond(){FactoryNew<DiskLog> diskFactory = new FactoryNew<DiskLog>();Ilog log = diskFactory.CreateLogInstance() as DiskLog;log.CreateLog();}//以上兩個方法是在我知道 到底是使用哪種log方法的測試。、//現(xiàn)在我不知道我到底要實(shí)例化哪種log 而是讀取配置文件 來動態(tài)創(chuàng)建 這樣該怎么辦？

//思路 我應(yīng)該從配置文件里面知道我到底改實(shí)例一個什么泛型的工廠 就是說我應(yīng)該傳遞什么類型進(jìn)入 泛型工廠？// 假如 配置在了config文件中。//1<appSettings>//<add key="logtype" value="EventLog"></add>//</appSettings>public void TestNewThrid(){string strfactoryName = ConfigurationSettings.AppSettings["logtype"];#region 此部分是思考過程object o= Activator.CreateInstance(Assembly.GetCallingAssembly().FullName, strfactoryName);Type t = o.GetType();//得帶log type。 然后根據(jù)logtype 再聲明 facttorynew<T>;object obj =Assembly.Load(Assembly.GetCallingAssembly().FullName).CreateInstance(strfactoryName);// FactoryNew < typeof(obj) > diskFactory = new FactoryNew< typeof(obj) >(); 走不通。// obj.調(diào)用方法。。。。。。。 失敗了！//思考，我為什要先創(chuàng)建factory 再創(chuàng)建log?!!! 我的目的是創(chuàng)建Log 。額 log log已經(jīng)創(chuàng)建了。。。。// 這里才是真正實(shí)現(xiàn)，注意 配置config的時候直接使用 log Type!跳過FactoryIlog logObj = Assembly.Load(Assembly.GetCallingAssembly().FullName).CreateInstance(strfactoryName) as Ilog;logObj.CreateLog();//搞定。//#endregion} }}

// 參考資料 http://terrylee.cnblogs.com/archive/2006/01/04/310716.html

?2013年9月26日 14:25:51

轉(zhuǎn)載于:https://www.cnblogs.com/cdemo/p/3340736.html

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