乐在其中设计模式(C#) - 抽象工厂模式(Abstract Factor.doc

介绍提供一个创建一系列相关或相互依赖对象的接口，而无需指定它们具体的类。示例有Message和MessageModel，Message有一个Insert()方法，该方法的参数是MessageModel。AbstractMessageModelusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/抽象Message实体类（AbstractProduct）/publicabstractclassAbstractMessageModel/*/构造函数/publicAbstractMessageModel()/*/构造函数/Message内容/Message发布时间publicAbstractMessageModel(stringmsg,DateTimept)this._message=msg;this._publishTime=pt; privatestring_message;/*/Message内容/publicstringMessagegetreturn_message;set_message=value;privateDateTime_publishTime;/*/Message发布时间/publicDateTimePublishTimegetreturn_publishTime;set_publishTime=value;/*/UserId/publicabstractstringUserIdget;set;SqlMessageModelusingSystem;usingSystem.Collections.Generic;usingSystem.Text; namespacePattern.AbstractFactory/*/SqlMessage实体类（Product）/publicclassSqlMessageModel:AbstractMessageModel/*/构造函数/publicSqlMessageModel():base()/*/构造函数/UserId/Message内容/Message发布时间publicSqlMessageModel(stringuserId,stringmsg,DateTimept):base(msg,pt)this._userId=userId;privatestring_userId;/*/Message内容/publicoverridestringUserIdgetreturn_userId;set_userId=value;XmlMessageModelusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/XmlMessage实体类（Product）/publicclassXmlMessageModel:AbstractMessageModel/*/构造函数/publicXmlMessageModel():base()/*/构造函数/UserId/Message内容/Message发布时间publicXmlMessageModel(stringuserId,stringmsg,DateTimept):base(msg,pt)this._userId=userId;privatestring_userId;/*/Message内容/publicoverridestringUserId/解密算法后的值getreturn_userId;/加密算法后的值set_userId=value;AbstractMessageusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/操作Message抽象类（AbstractProduct）/publicabstractclassAbstractMessage/*/插入Message/AbstractMessageModel/publicabstractstringInsert(AbstractMessageModelamm);SqlMessageusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/Sql方式操作Message类（Product）/publicclassSqlMessage:AbstractMessage/*/插入Message/AbstractMessageModel/publicoverridestringInsert(AbstractMessageModelamm)returnSql方式插入Message。帐号：+amm.UserId+；内容：+amm.Message+；时间：+amm.PublishTime.ToString();XmlMessageusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/Xml方式操作Message类（Product）/publicclassXmlMessage:AbstractMessage/*/插入Message/AbstractMessageModel/publicoverridestringInsert(AbstractMessageModelamm)returnXml方式插入Message。帐号：+amm.UserId+；内容：+amm.Message+；时间：+amm.PublishTime.ToString();AbstractMessageFactoryusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/抽象Message工厂（AbstractFactory）/publicabstractclassAbstractMessageFactory/*/创建MessageModel对象/publicabstractAbstractMessageModelCreateMessageModel();/*/创建Message对象/publicabstractAbstractMessageCreateMessage();SqlMessageFactoryusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/SqlMessage工厂（ConcreteFactory）/publicclassSqlMessageFactory:AbstractMessageFactory/*/创建SqlMessageModel对象/publicoverrideAbstractMessageModelCreateMessageModel()returnnewSqlMessageModel();/*/创建SqlMessage对象/publicoverrideAbstractMessageCreateMessage()returnnewSqlMessage();XmlMessageFactoryusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/XmlMessage工厂（ConcreteFactory）/publicclassXmlMessageFactory:AbstractMessageFactory/*/创建XmlMessageModel对象/publicoverrideAbstractMessageModelCreateMessageModel()returnnewXmlMessageModel();/*/创建XmlMessage对象/publicoverrideAbstractMessageCreateMessage()returnnewXmlMessage();MessageusingSystem;usingSystem.Collections.Generic;usingSystem.Text;namespacePattern.AbstractFactory/*/Context类/publicclassMessageprivateAbstractMessage_insertMessage;privateAbstractMessageModel_messageModel;/*/构造函数/AbstractMessageFactorypublicMessage(AbstractMessageFactoryfactory)DateTimept=DateTime.Now;_insertMessage=factory.CreateMessage();_messageModel=factory.CreateMessageModel();/*/插入Message/UserId/Message内容/Message发布时间/publicstringInsert(stringuserId,stringmsg,DateTimept)_messageModel.UserId=userId;_messageModel.Message=msg;_messageModel.PublishTime=pt;return_insertMessage.Insert(_messageModel);clientusingSystem;usingSystem.Data;usingSystem.Configuration;usingSystem.Collections;usingSystem.Web;usingSystem.Web.Security;usingSystem.Web.UI;usingSystem.Web.UI.WebControls;usingSystem.Web.UI.WebControls.WebParts;usingSystem.Web.UI.HtmlControls;usingPattern.AbstractFactory;publicpartialclassAbstractFactory:System.Web.UI.PageprotectedvoidPage_Load(objectsender,EventArgse)AbstractMessageFactoryamf=newSqlMessageFactory();Messagem=newMessage(amf);Response.Write(m.Inse