Topic: C#中，声明一个抽象类，继承于一个接口，那么在抽象类中需要实现接口函数吗？ @佛州华人论坛:佛州枫下论坛 The Rolia Forum of Florida

工作学习 / 学科技术讨论 / C#中，声明一个抽象类，继承于一个接口，那么在抽象类中需要实现接口函数吗？ -tonyhao(tonyhao); 2008-10-11 (#4759674@0)

兄台，能不能用英文写专业术语，让俺也能看懂点 -c1xwy(洪兴罩俺去战斗); 2008-10-11 (#4759685@0)
你可以自己试，看编译器能通过否，有结论后，在更新一下帖子 -googlebot(bot); 2008-10-11 (#4759706@0)
All methods in interface has to be implemented in child class no mater it’s abstract or normal. -deep_blue(BLUE); 2008-10-12 (#4760107@0)

Actually, MS already suggest not using abstract class, use interface instead. Because some Rumtime issue. If I remmeber correctly -21cnhanhao(大耳朵兔子); 2008-10-15 (#4769466@0)

Never heard about the issue. You might misunderstand.There are technical issues with multiple inheritance, so many OO languages restrict inheritance to a single direct base class (either normal or abstract). However multiple- interface inheritance is not limited. This doesn’t mean you cannot use abstract class. -deep_blue(BLUE); 2008-10-16 {261} (#4772277@0)
正好相反 -tonyhao(tonyhao); 2008-10-17 (#4773306@0)

en, 在微软出的一本书中看到过作者对抽象类和接口的说明，那小子所在的项目第一版全都用的接口，然后后悔不已。第二版全都改成了抽象类 ^_^ -binghongcha76(一只大猫); 2008-10-17 (#4773371@0)

As a base class in project. We can make our decision as follows:if you need "multiple inheritance", you must use Interface. If the base class will be changed often, I prefer abstract class. If you had some "default behaviour" that will implement in every child class, then just use a normal class. For other situation do as you like. -benbendan(相忘于江湖); 2008-10-17 {274} (#4773622@0)
Actually abstract class is quite different from interface. -deep_blue(BLUE); 2008-10-17 {1405} (#4774397@0)

借你帖问一个编程构架问题: WEB APPLICATION 就没必要多层次OO了. ? 一个PAGEBASE大家INHERIT就够了?PAGE POSTBACK 后OO中的CLASS FIELD (PUBLIC)就不能用了. 我只能用VIEWSTATE来代替.
也许我还不懂更高深的... (我只是入门菜鸟) -whereismyid(到处找ID); 2008-10-17 {120} (#4773389@0)

表达有问题. 我的意思是WEB APPLICATION 没必要复杂OO. -whereismyid(到处找ID); 2008-10-17 (#4773426@0)

OO好处是代码重用。我碰到一位同胞把同样的代码copy到几十个地方，跟我谈心得：copy完了再加点新东西，又可以和领导说新写了多少多少代码。NND他现在跳槽走了，让我接手这垃圾，同样的错误一发现就要改几十个地方。 -tjhong(我检讨); 2008-10-17 (#4773496@0)

OO本意是为了系统容易维护，class代码相对独立，这个人代码肯定不是OO,设计好的class，不会改这么多地方。 OO其实也没什么用，MS牛B, MS .Net framework 那么多class, 前后版本都不兼容，说明OO对大系统没什么意义，unix/linux还是用C -googlebot(bot); 2008-10-17 (#4773543@0)

为啥要前后版本兼容，把.NET Framework 1.1/2.0/3.0/3.5全装上就是了，一个也就２０－３０兆大小，免费。 -tjhong(我检讨); 2008-10-17 (#4773636@0)

你装过没？20-30M ? 太小看MS ,运行一个.net exe,要装一堆东西，还分版本，太烂了 -googlebot(bot); 2008-10-17 (#4774000@0)

Microsoft .NET Framework Version 1.1 Redistributable ==> -tjhong(我检讨); 2008-10-17 (#4774307@0)
Microsoft .NET Framework Version 2.0 Redistributable ==> -tjhong(我检讨); 2008-10-17 (#4774313@0)
Microsoft .NET Framework 3.0 Redistributable ==> -tjhong(我检讨); 2008-10-17 (#4774321@0)

that's right. my working environment was installed all versions of .net framework -whereismyid(到处找ID); 2008-10-17 (#4774030@0)

@Florida