状态模式 StatePattern

类图

状态接口

interface IState { void Do(); void UnDo(); }

状态A

using System; class AskPay : IState { private CustCommodityAuditing _CCA; public AskPay(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("您已经付款成功。"); Console.WriteLine("Mailing..."); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.PaySuccess; } public void UnDo() { Console.WriteLine("您已经超过了付款期限。"); Console.WriteLine("Mailing"); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.PayFailed; } #endregion }

状态B

using System; class AuditingFailed : IState { private CustCommodityAuditing _CCA; public AuditingFailed(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("订单处理结束。"); Console.WriteLine("--------------------------------------------------------------"); } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }

状态C

using System; class AuditingSuccess : IState { private CustCommodityAuditing _CCA; public AuditingSuccess(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("系统已经打印出你需付款的清单，请您尽快付款。"); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.AskPay; } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }

状态D

using System; class BeginMake : IState { private CustCommodityAuditing _CCA; public BeginMake(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("你定做的商品已经完工。"); Console.WriteLine("Mailing..."); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.CompleteMake; } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }

状态E

using System; class CancelAuditingMessage : IState { private CustCommodityAuditing _CCA; public CancelAuditingMessage(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("订单处理结束。"); Console.WriteLine("--------------------------------------------------------------"); } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }  

状态F

using System; class CompleteMake : IState { private CustCommodityAuditing _CCA; public CompleteMake(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("您的产品已经完成，请您再次确认收货地址。"); Console.WriteLine("Mailing"); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.WaitingPost; } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }  

状态G

using System; class CompleteOrder : IState { private CustCommodityAuditing _CCA; public CompleteOrder(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("订单处理完毕"); Console.WriteLine("--------------------------------------------------------------"); } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }  

状态H

using System; class PayFailed : IState { private CustCommodityAuditing _CCA; public PayFailed(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("订单处理结束。"); Console.WriteLine("--------------------------------------------------------------"); } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }  

状态I

using System; class PaySuccess : IState { private CustCommodityAuditing _CCA; public PaySuccess(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("您定做的商品现在已经加入到了我们的生产队列中了。"); Console.WriteLine("Mailing"); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.BeginMake; } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }  

状态J

using System; class PostSuccess : IState { private CustCommodityAuditing _CCA; public PostSuccess(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("我们已经将你订购的商品成功寄出，请您收到商品后尽快确认收货。"); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.ReceiveSuccess; } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }  

状态K

using System; class ReceiveSuccess : IState { private CustCommodityAuditing _CCA; public ReceiveSuccess(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("感谢您对我们的支持！您已经确认了收货信息。"); Console.WriteLine("Mailing..."); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.CompleteOrder; } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }  

状态L

using System; class SentAuditingMessage : IState { private CustCommodityAuditing _CCA; public SentAuditingMessage(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("已经向系统提交了您的审核请求."); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.WaitAudit; } public void UnDo() { Console.WriteLine("你已经取消了您提交的审核请求."); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.CancelAuditingMessage; } #endregion }  

状态M

using System; class WaitAudit : IState { private CustCommodityAuditing _CCA; public WaitAudit(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("您的定做请求已经通过。"); Console.WriteLine("Mailing..."); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.AuditingSuccess; } public void UnDo() { Console.WriteLine("您的定做请求没有通过审核。"); Console.WriteLine("Mailing..."); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.AuditingFailed; } #endregion }  

状态N

using System; class WaitingPost : IState { private CustCommodityAuditing _CCA; public WaitingPost(CustCommodityAuditing cca) { _CCA = cca; } #region IState 成员 public void Do() { Console.WriteLine("您的商品已经寄出。"); Console.WriteLine("Mailing"); Console.WriteLine("--------------------------------------------------------------"); _CCA.CurrentState = _CCA.PostSuccess; } public void UnDo() { throw new System.Exception("The method or operation is not implemented."); } #endregion }  

状态处理机 

using System; class CustCommodityAuditing { private IState _CurrentState; private IState _AskPay; private IState _AuditingFailed; private IState _AuditingSuccess; private IState _BeginMake; private IState _CancelAuditingMessage; private IState _CompleteMake; private IState _CompleteOrder; private IState _PayFailed; private IState _PaySuccess; private IState _PostSuccess; private IState _ReceiveSuccess; private IState _SentAuditingMessage; private IState _WaitAudit; private IState _WaitingPost; public CustCommodityAuditing() { _AskPay = new AskPay(this); _AuditingFailed = new AuditingFailed(this); _AuditingSuccess = new AuditingSuccess(this); _BeginMake = new BeginMake(this); _CancelAuditingMessage = new CancelAuditingMessage(this); _CompleteMake = new CompleteMake(this); _CompleteOrder = new CompleteOrder(this); _PayFailed = new PayFailed(this); _PaySuccess = new PaySuccess(this); _PostSuccess = new PostSuccess(this); _ReceiveSuccess = new ReceiveSuccess(this); _SentAuditingMessage = new SentAuditingMessage(this); _WaitAudit = new WaitAudit(this); _WaitingPost = new WaitingPost(this); _CurrentState = SentAuditingMessage; } #region 属性 public IState CurrentState { get { return _CurrentState; } set { _CurrentState = value; } } public IState AskPay { get { return _AskPay; } } public IState AuditingFailed { get { return _AuditingFailed; } } public IState AuditingSuccess { get { return _AuditingSuccess; } } public IState BeginMake { get { return _BeginMake; } } public IState CancelAuditingMessage { get { return _CancelAuditingMessage; } } public IState CompleteMake { get { return _CompleteMake; } } public IState CompleteOrder { get { return _CompleteOrder; } } public IState PayFailed { get { return _PayFailed; } } public IState PaySuccess { get { return _PaySuccess; } } public IState PostSuccess { get { return _PostSuccess; } } public IState ReceiveSuccess { get { return _ReceiveSuccess; } } public IState SentAuditingMessage { get { return _SentAuditingMessage; } } public IState WaitAudit { get { return _WaitAudit; } } public IState WaitingPost { get { return _WaitingPost; } } #endregion #region 方法 public void Do() { _CurrentState.Do(); } public void UnDo() { _CurrentState.UnDo(); } #endregion } 

调用者

using System; using System.Collections.Generic; using System.Text; namespace StatePattern { class Program { static void Main(string[] args) { CustCommodityAuditing cca = new CustCommodityAuditing(); cca.Do(); cca.Do(); cca.Do(); cca.Do(); cca.Do(); cca.Do(); cca.Do(); cca.Do(); cca.Do(); cca.Do(); cca.Do(); //cca.UnDo(); //cca.Do(); //cca.Do(); //cca.UnDo(); //cca.Do(); //cca.Do(); //cca.Do(); //cca.Do(); //cca.UnDo(); //cca.Do(); Console.ReadKey(); } } }

 

 

执行结果：

已经向系统提交了您的审核请求.
--------------------------------------------------------------
您的定做请求已经通过。
Mailing...
--------------------------------------------------------------
系统已经打印出你需付款的清单，请您尽快付款。
--------------------------------------------------------------
您已经付款成功。
Mailing...
--------------------------------------------------------------
您定做的商品现在已经加入到了我们的生产队列中了。
Mailing
--------------------------------------------------------------
你定做的商品已经完工。
Mailing...
--------------------------------------------------------------
您的产品已经完成，请您再次确认收货地址。
Mailing
--------------------------------------------------------------
您的商品已经寄出。
Mailing
--------------------------------------------------------------
我们已经将你订购的商品成功寄出，请您收到商品后尽快确认收货。
--------------------------------------------------------------
感谢您对我们的支持！您已经确认了收货信息。
Mailing...
--------------------------------------------------------------
订单处理完毕
--------------------------------------------------------------