面向AO编程的必经之路.docVIP

??????等级：版主??威望：2??文章：345??注册：2001-7-13 ?[ArcGIS]ArcGIS开发系列-1ArcGIS开发系列，面向开发，当然要求用户层次稍微高一些。-?COM第二部分?-?Object?model?diagrams第三部分?-?Map?and?layers(暂定，入门用) -基于ArcGIS-ArcObjects，面向开发初级，高级编程的必经之路-使用ArcGIS-VBA-采用英文和中文结合，重点翻译-争取每日一贴 1?COM:?Component?Object?Model-Working?with?COM?classes?Interfaces?Polymorphism(多态性)QueryInterface 详细解释：-COM:?Component?Object?Mode-l组建对象模型COM?is?a?protocol?that?connects?one?software?component,?or?module,?with?another.?With?this?protocol,?it?is?possible?to?build?reusable?software?components?that?can?be?dynamically?interchanged?in?a?distributed?system.?-InterfacesAll?ArcMap?and?ArcCatalog?(ArcInfo)?classes?are?COM?classes.?COM?classes?use?interfaces?to?organize?properties?and?methods.?Classes?may?have?many?interfaces.?可以理解为一组有功能关系的properties?and?methods的结合，对外是一个Interface-QueryInterfaceCOM?objects?use?COM?interfaces?to?communicate?with?each?other.?When?working?with?COM?objects,?the?developer?never?works?with?the?COM?object?directly,?but?via?one?of?its?interfaces.?Interface转到另一个Interface，称作QueryInterface，和指针的概念相似？-PolymorphismClasses?can?share?the?same?interface?but?have?unique?implementation.Class和Object的概念，这个不会太困难。An?object?is?an?instance?of?a?class。  2?Introducing?COM-简介-COM?is?a?standard?for?creating?classes??是用于创建类的标准-Classes?can?be?reused?between?applications??类可以在应用程序间重复使用??--Independent?of?programming?language????和编程语言无关，即独立于编程语言-All?ArcObjects?are?COM?classes??所有ArcObjects都是COM的类-Technologies?based?on?COMCOM的技术如下--Object?Linking?and?Embedding?(OLE)??--OLE?DB??--ActiveX?is?any?technology?built?on?COM???--DCOM?and?COM+ 详细解释： 以下为需要文章数达到30才能浏览的内容 COM?is?a?standard?that?specifies?how?classes?should?be?programmed,?not?a?language.?COM?is?a?binary?specification?that?establishes?a?common?method?of?building?software?components.?COM?是指定类如何编程设计的一个标准，不是程序设计的语言。是一个能够建立软件组件的一种通用的二进制规范。ReuseCOM?allows?components?to?be?reused?at?a?binary?level,?meaning?third?party?developers?do?not?require?access?t