知识大全剖析ASP.NET AJAX的面向对象思想[2]

Posted 2022-07-16 属性

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　　继承

　　继承是一个类派生于另一个类的能力派生类自动继承基类的所有字段属性方法和事件派生类可以增加新的成员或者重写基类已存在的成员来改变成员的行为

　　下面的脚本实例有两个类Person和Employee Employee从Person继承而来两个类示范了私有字段的使用它们都有公共属性方法另外Employee类重写了Person类的toString实现并调用了基类的功能

Type registerNamespace( Demo );

Demo Person = function(firstName lastName emailAddress) this _firstName = firstName; this _lastName = lastName; this _emailAddress = emailAddress;

Demo Person prototype = getFirstName: function() return this _firstName;

getLastName: function() return this _lastName;

getEmailAddress: function() return this _emailAddress; setEmailAddress: function(emailAddress) this _emailAddress = emailAddress;

getName: function() return this _firstName + + this _lastName;

dispose: function() alert( bye + this getName());

sendMail: function() var emailAddress = this getEmailAddress();

if (emailAddress indexOf( @ ) < ) emailAddress = emailAddress + @example ; alert( Sending mail to + emailAddress + );

toString: function() return this getName() + ( + this getEmailAddress() + ) ; Demo Person registerClass( Demo Person null Sys IDisposable);Demo Employee = function(firstName lastName emailAddress team title) Demo Employee initializeBase(this [firstName lastName emailAddress]);

this _team = team; this _title = title;

Demo Employee prototype =

getTeam: function() return this _team; setTeam: function(team) this _team = team;

getTitle: function() return this _title; setTitle: function(title) this _title = title; toString: function() return Demo Employee callBaseMethod(this toString ) + \\r\\n + this getTitle() + \\r\\n + this getTeam(); Demo Employee registerClass( Demo Employee Demo Person);

　　Inheritance js脚本文件中定义了两个类 Person和Employee Employee是从Person继承而来每个类都有字段公共属性和方法另外 Employee类重写了toString的实现并在重写的代码中调用了基类的功能在这个例子中把类Person的名字空间设定为 Demo 运行页面Inheritance aspx 点击创建对象对象释放公共和私有属性对象方法重写方法对象类型检查体验一下

cha138/Article/program/net/201311/15064

知识大全 剖析ASP.NET AJAX的面向对象思想[2]

知识大全剖析ASP.NET AJAX的面向对象思想[2]