房地产中介管理系统的设计的外文文献翻译

1、房地产中介管理系统的设计的外文文献翻译附录A外文文献及参考译文The company Sybase PowerBuilder is a new, fast development tools, client/server structure, it isbased on Windows3windows95X. WindowsNT and a integrated development tools.It contains an intuitive GUI and extensible object-oriented programminglanguage, provide PowerScrip

2、t with current popular large database interface, and through the ODBC and stand-alone database Its main characteristics are as follows: 1 the visualization, more characteristic of development tools Fully supports Windows or WindowsNT provide control, events and function. PowerScript language provide

3、s hundreds of internal function, and has an object-oriented compilers and debugged compile new code any time, and with complete online help and programming examples 2 powerful object-oriented technology Supportting for the definition of through to establish visual or invisible object model, and supp

4、ort all the object-oriented programming technology, such as inheritance and polymorphism data encapsulation and function etc These characteristics to ensure the reliability of the application software, and improve the maintainability of software3it support efficient complex applications Which based

5、on Windows environment application provides complete support, this environment includ Windows, WindowsNT and WinOS / 2 Developers can use built-in WatcomC/c + + PowerBuilder to define compilation and debuga class 4the capcity of enterprise database connection. The main characteristic of PowerBuilder

6、 is DataWindow data window, through the DataWindow we can easily operate on database, and also can handle various reports, without writing SQL, it can directly connect with Sybase Informix SQLServer and Oracle database ostrongly inquiry, statements and graphics functions capcity PowerBuilder provide

7、s query builder and multiple tables which can quickly create queries object, and use the results as the source of data for various reports PowerBuilder mainly suitable for management information system development, especially the client/server architectureBefore we study the PowerBuilder , we should

8、er make clear what s the powerbuider, which is used for and what * s the characteristic of it. Only we know PowerBuilder* s function and characteristic, we can know what time should be chosen PowerBuilder as our application development toolsWe know, database application is a very important aspect of

9、 the computer application of but at present the database application technology is widely used in the client/server architecture, in which all data and database management systems in the server, by using standard of clients to visit SQL server database data .Due to the system structure of the data a

10、nd the data were unified management on the serverTo ensure that the data security and integrity, also can make full use of thecharacteristics of high-performance server .Because the client/server system structure of these advantages so it used very widely.PowerBuilder is a famous database applicatio

11、n development tools manufacturers PowerSoft company product PowerSoft manufacturer has been bought by Sybase, it completely according to client/server architecture design, research on client/server structure, it is used in the client database application, as the development tools .Because of using P

12、owerBuilder object-oriented and visualization technology, providing visual application development environment, so that we can use convenient PowerBuilder to develop the backend server using the data and database management system of database applicationsAt present, the rapid development of networkt

13、echnology, development and OLE, cross-platform, OCX technology, such as in the PowerBuilder 6.0 PowerBuilder to these techniques provide a full support Anyhow, in database development tools PowerBuilder is one of very good one, we can use it to develop powerful database applicationsProvides for Powe

14、rBuilder most relational database management system support, because in the application of PowerBuilder part of database access generally adopted international standard SQL database query language, make use of the development application can PowerBuilder or do not do small changes can be in differen

15、t backend database management system Using PowerBuilder development is the application is independent of the server database management systemAnd most of the WINDOWS applications, event-driven PowerBuilder also works In this way of working, the execution of the program has no fixed process, the code

16、 for various events, when the program is running, it can be accepted from system, user or other applications, then trigger events executes events code .Working with the event-drivenobject-oriented technology is closely related to PowerBuilder in application, accept events is often the various kinds

17、of visual programming interfacePowerBuilder is a kind of object-oriented development tools and various WINDOWS application window, menu, the common control etc .Are all in one PowerBuilder object We can also PowerBuilder in creating your own user objects Special PowerBuilder to point out of object-o

18、riented method provides all kinds of technical support, we can use the object of object-oriented method, the inheritance and polymorphism encapsulation characteristics such as we develop applications that have great reusability and expansibility, while it is in software engineering applications of t

19、he important targetsAt present, due to the development of network technology, many different kinds of operating system platform in the internet use, it is also about the application cross-platform-ability put forward higher request, and will provide a good PowerBuilder cross-platform-ability, forins

20、tance, using PowerBuilder in various objects platform development WINDOWS can be easily applied to the unix operating platform, because the cross-platform-ability PowerBuilder support object .This makes the application from a platform to another platform is complex BecomeIn order to offer customers

21、all aspects of PowerBuilder support, has its own programming language, the language powerscript besides providing basic flow control statements, and also provides hundreds of function of objects and offer to manipulate, ole, etc, such as dde support In addition, we can define your own functions, wit

22、h a particular event .Learning is the time when the part PowerBuilder to understanding and knowledge of the various functions PowerBuilder provideA great characteristic is PowerBuilder put forward the concept of data window object Data window object is a type of object PowerBuilder, and other object

23、s of different data window object is designed to access the database services,data window object we define data sources and data display style, so in applications we can concentrate entirely on the execution of the program flow control, and dont care specific data sources, because we have window obj

24、ect in data definition good data sources If need to use the database of different data also modify data window object Especially in the data that was in the window object PowerBuilder provides abundant data display mode, can satisfy all sorts of different needsIn a new version of PowerBuilder provid

25、es a base class library, its application for PFC provides many developing reusable predefined class and object, using basic class libraries can rapidly developed PFC high quality reusability good application. Really enormous power of object- oriented programmingPowerBuilder美国Sybase公司硏制的一种新型、快速开发工具，是

26、客户机/服务器结构下，基于Windows3. x、windows95和WindowsNT的一个集成化开 发工具。它包含一个直观的图形界面和可扩展的面向对象的编程语言PowerScript,提供与当前流行的大型数据库的接口，并通过ODBC与单机数据库相连。其主要 特点如下：1可视化、多特性的开发工具。全面支持Windows或WindowsNT所提 供的控制、事件和函数。PowerScript语言提供了儿百个内部函数，并且具有一 个面向对象的编译器和调试器，可以随时编译新增加的代码,带有完整的在线帮助和编程实例。2功能强大的面向对象技术。支持通过对类的定义来建立可视或不可视对象模型，同时支持所有面

27、向对象编程技术，如继承、数据封装和函数多 态性等。这些特性确保了应用程序的可靠性，提高了软件的可维护性。3支持高 效的复杂应用程序。对基于Windows环境的应用程序提供了完备的支持，这些环 境包括Windows、WindowsNT和WinOS/2。开发人员可以使用PowerBuilder内置 的WatcomC/C+来定义、编译和调试一个类。4企业数据库的连接能力。PowerBuilder的主要特色是DataWindow（数据窗口），通过DataWindow可以方地对数据库进行各种操作厂也可以处理各种报表，而无需编写SQL语句,可以直 接与Sybase、SQLServer、Informix、O

28、racle等大型数据库连接。5强大的查 询、报表和图形功能。PowerBuilder提供的可视化查询生成器和多个表的快速选择器可以建立查询对象，并把查询结果作为各种报表的数据来源。PowerBuilder 主要适用于管理信息系统的开发,特别是客户机/服务器结构。在开始学习PowerBuilder之前，首-先要弄清楚的问题是什么是PowerBuilder, 它是用来干什么的,它的特点乂是什么。只有知道了 PowerBuilder的功能和特点所 在，我们才能知道什么时候应该选用PowerBuilder作为我们的应用程序开发工具。我们知道，数据库应用是当前讣算机应用的一个非常重要的方面，而在訂前的数

29、 据库应用技术中普遍采用的就是客户机/服务器体系结构，在这种体系结构中，所有 的数据和数据库管理系统都在服务器上，客户机通过采用标准的SQL语句等方式来 访问服务器上数据库中的数据。山于这种体系结构把数据和对数据的管理都统一放 在了服务器上。就保证了数据的安全性和完整性，同时也可以充分利用服务器高性 能的特点。正因为客户机/服务器体系结构的这些优点，因而得到了非常广泛的应 用。PowerBuilder是著名的数据库应用开发工具生产厂商PowerSoft公司推出的产 品（PowerSoft现已被数据库厂商Sybase所收购），它完全按照客户机/服务器体系 结构研制设讣，在客户机/服务器结构中，它

30、使用在客户机中，作为数据库应用程序的 开发工具而存在。由于PowerBuilder采用了面向对象和可视化技术,提供可视化的 应用开发环境，使得我们利用PowerBuilder,可以方便快捷地开发出利用后台服务 器中的数据和数据库管理系统的数据库应用程序。在当前，网络技术迅速发展，随之发展的还有OLE, OCX,跨平台等技术，而在 PowerBuilder的PowerBuilder 6. 0中提供了对这些技术的全面支持。总之在数据 库开发工具领域,PowerBuilder是其中非常优秀的一个，利用它我们可以开发出功能强大的数据库应用程序。PowerBuilder提供了对U前流行的大多数关系数据库

31、管理系统的支持，山于在 PowerBuilder的应用程序中对数据库访问的部分一般采用国际化标准数据库查询 语言SQL,使得用PowerBuilder开发的应用程序可以不做修改或者只做少量的修改 就可以在不同的后台数据库管理系统上使用。也就是说用PowerBuilder开发的应 用程序是独立于服务器上的数据库管理系统的。和大多数的WINDOWS应用程序一样,PowerBuilder也是事件驱动工作方式。在 这种工作方式中,程疗;的运行没有固定的流程，程序中的代码也是为各种可能发生的 事件编写的，当程序开始运行之后，它就可以接受来自系统，用户或者其它应用程序 触发的事件,然后执行相应的事件代码。事件驱动的工作方式与面向对象技术是紧 密相关的，在PowerB