Publish subscriber Mode C # delegate implementation

1 using system; 2 using system. collections. generic; 3 using system. LINQ; 4 using system. text; 5 using system. threading. tasks; 6 7 namespace delegate and publish subscriber Mode 8 {9 10/** 11 * machine as subscriber, repair worker repairer as subscriber 12 * worker (subscriber) register different machine events, register the callback function to handle 13 * different workers when the corresponding event occurs. only pay attention to the events they are interested in. 14 */15 // machine Class 16 public class machine 17 {18 // whether the machine is working normally 19 public bool isworkwell {Get; set;} 20 21 // host fault event Delegate 22 public de Legate void machinebroken (string brokenmsg); 23 public event machinebroken machinebrokenevent; 24 25 // 26 Public Delegate void machineworkwell (string MSG); 27 public event machineworkwell machineworkwellevent; 28 29 // machine operation 30 public void run () 31 {32 isworkwell = false; // set machine failure 33 34 if (machinebrokenevent! = NULL) // a subscriber registers for a Machine Fault event 35 {36 IF (! Isworkwell) 37 machinebrokenevent ("the machine has failed. Let's take a look at the speed ~ "); 38} 39 40 isworkwell = true; // set the machine to restore to normal 41 42 if (machineworkwellevent! = NULL) // There Is A subscriber registered machine running normal event 43 {44 If (isworkwell) 45 machineworkwellevent ("the machine is running properly, don't worry, kiss ~ "); 46} 47} 48 49 // public void onmachinebrokenevent (string brokenmsg) 50 // {51 // machinebroken handler = machinebrokenevent; 52 // If (handler! = NULL) handler (brokenmsg); 53 //} 54 55 // public void onmachineworkwellevent (string MSG) 56 // {57 // machineworkwell handler = machineworkwellevent; 58 // If (handler! = NULL) handler (MSG); 59 //} 60} 61 62 public interface iworker 63 {64 string name {Get; set;} 65 void dojob (string MSG ); 66} 67 68 // busyworker registers for a machine failure event 69 public class busyworker: iworker 70 {71 public string name {Get; set;} 72 73 public void dojob (string MSG) 74 {75 console. writeline (string. format ("{0}: Received message <{1}>! Please wait ~ ", Name, MSG); 76} 77} 78 79 // idleworker registers for normal machine operation event 80 public class idleworker: iworker 81 {82 public string name {Get; set ;} 83 84 public void dojob (string MSG) 85 {86 console. writeline (string. format ("{0}: Received message <{1}>! Very good, so that I can have more sleep ~ ", Name, MSG); 87} 88} 89 90 public class subscriberpatter=adelegate 91 {92 static void main (string [] ARGs) 93 {94 machine = new machine (); 95 96 iworker busyworker = new busyworker (); 97 busyworker. name = "busy worker"; 98 99 iworker idleworker = new idleworker (); 100 idleworker. name = "Idle worker"; 101 102 machine. machinebrokenevent + = new machine. machinebroken (busyworker. dojob); 103 machine. machineworkwellevent + = new machine. machineworkwell (idleworker. dojob ); 104 105 ////////////////////////////////////// //////////////////////////////////////// /////////// 106 // verify whether multiple subscribers can be added for an event 107 iworker busyworker2 = new busyworker (); 108 busyworker2.name = "busy worker 2"; 109 machine. machinebrokenevent + = new machine. machinebroken (busyworker2.dojob); 110 // the test result is 111. // you can also use static delegation, one of the advantages of static delegation is that it saves 112 of the memory space ///////////////////////////// //////////////////////////////////////// /// // 113 114 machine. run (); // The machine starts to operate 115 116 console. readline (); 117} 118} 119}