Responsibility Chain Mode in Design Mode

When many objects have the opportunity to process the request, so as to avoid coupling between the request sender and the receiver, connect the object into a chain and process the request along the chain, until an object processes it.

Figure:

Example of asking for a raise:

// Apply for class Request {// apply for category private string requestType; public string RequestType {get {return requestType;} set {requestType = value ;}// apply for private string requestContent; public string RequestContent {get {return requestContent;} set {requestContent = value ;}/// quantity requested private int number; public int Number {get {return number ;} set {number = value ;}}// manager abstract class Manag Er {protected string name; protected Manager superior; // The upper-level public Manager (string name) of the Manager {this. name = name;} public void setsuperior (Manager superior) {this. superior = superior;} // Request abstract public void RequestApplications (request Request);} // Manager class CommonManager: Manager {public CommonManager (string name): base (name) {} public override void RequestApplications (Request request) {// Throw new NotImplementedException (); if (request. requestType = "leave" & request. number <= 2) {Console. writeLine ("{0 }:{ 1} quantity {2} approved", name, request. requestContent, request. number);} else {if (superior! = Null) {superior. requestApplications (request) ;}}// the Director also inherits the Manager class Majordomo: Manager {public Majordomo (string name): base (name) {} public override void RequestApplications (Request request) {// throw new NotImplementedException (); \ if (request. requestType = "leave" & request. number <= 5) {Console. writeLine ("{0 }:{ 1} quantity {2} approved", name, request. requestContent, request. number);} else {if (s Uperior! = Null) {superior. requestApplications (request) ;}}// general Manager class GeneralManager: Manager {public GeneralManager (string name): base (name) {} public override void RequestApplications (Request request) {// throw new NotImplementedException (); if (request. requestType = "leave") {Console. writeLine ("{0 }:{ 1} quantity {2} approved", name, request. requestContent, request. number);} else if (request. requestType = "salary increase" & request. number <= 500) {Console. writeLine ("{0 }:{ 1} quantity {2} approved", name, request. requestContent, request. number);} else {Console. writeLine ("{0 }:{ 1} count {2}", name, request. requestContent, request. number) ;}} class Program {static void Main (string [] args) {CommonManager jinli = new CommonManager ("gionee "); majordomo zongjian = new Majordomo ("Director"); GeneralManager zhongjingli = new GeneralManager ("General Manager"); jinli. setsuperior (zongjian); zongjian. setsuperior (zhongjingli); Request request = new Request (); request. requestType = "leave"; request. requestContent = "food for leave"; request. number = 4; jinli. requestApplications (request); Request request2 = new Request (); request2.RequestType = ""; request2.RequestContent = ""; request2.Number = 4; jinli. requestApplications (request2); Request request3 = new Request (); request3.RequestType = "salary increase"; request3.RequestContent = "food Request salary increase"; jinli. requestApplications (request3); Request request4 = new Request (); request4.RequestType = "salary increase"; request4.RequestContent = "food Request salary increase"; request4.Number = 1000; jinli. requestApplications (request4); Console. read ();}}

Running result: