\u901a\u5e38\u30d1\u30bf\u30fc\u30f3\u3002<\/p>\n
\r\nusing System.Windows.Forms;\r\n\r\nnamespace WindowsFormsApp1\r\n{\r\n public partial class Form1 : Form\r\n {\r\n public Form1()\r\n {\r\n InitializeComponent();\r\n ConcreateObserver o = new ConcreateObserver();\r\n ConcreateSubject s = new ConcreateSubject();\r\n s.attach(o);\r\n s.notify();\r\n }\r\n }\r\n\r\n interface ISubject\r\n {\r\n void attach(IObserver o);\r\n void detach();\r\n void notify();\r\n }\r\n interface IObserver\r\n {\r\n void update(ISubject s);\r\n }\r\n\r\n class ConcreateSubject : ISubject\r\n {\r\n IObserver observer;\r\n\r\n public void attach(IObserver o)\r\n {\r\n observer = o;\r\n }\r\n public void detach()\r\n {\r\n observer = null;\r\n }\r\n public void notify()\r\n {\r\n observer.update(this);\r\n }\r\n }\r\n class ConcreateObserver : IObserver\r\n {\r\n public void update(ISubject s)\r\n {\r\n MessageBox.Show(\"\");\r\n }\r\n }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"\u901a\u5e38\u30d1\u30bf\u30fc\u30f3\u3002 using System.Windows.Forms; namespace WindowsFormsApp1 { public partial class Form1 : Form { public Fo … <\/p>\n