【正文】 9. 命令對象 命令對象的是兩個對應(yīng)課 :sqlmand 和 oledbmand。數(shù)據(jù)集中居住在內(nèi)存和數(shù)據(jù)可以操縱、更新的獨立的數(shù)據(jù)庫。 有兩個內(nèi)核對象允許我們與數(shù)據(jù)最初 :datareader 和數(shù)據(jù)。 雖然 被稱為未來的發(fā)展，這是十分不同于它的前任。 采用了許多新功能的程序到服務(wù)器端網(wǎng)頁，包括一項新類別的元 素稱為服務(wù)器控件，導(dǎo)致多達 200HTML、 JavaScript 功能的一個或多個從一個服務(wù)器控件標簽。 HTTP 請求離開客戶端的 Web 服務(wù)器，即送交維修程序。的客戶端處理是在客戶端通過工作站的客戶端瀏覽器的交互的程序直接執(zhí)行的數(shù)據(jù)庫。在某些情況下，程序執(zhí)行的查詢，如雖然這問題不需要用戶輸入、結(jié)果視乎當(dāng)查詢。供應(yīng)商需要能夠跟蹤的顧客調(diào)查和喜好和處理他們的命令。這是核心特性它周圍建 mysql。 這是快速、可靠和容易使用。這是由公共語言運行庫 (CLR)編譯器，支持多種語言。利用 是面向?qū)ο蟮?，有許多程序設(shè)計的工具，可以更快發(fā)展，越來越多的功能。例如，如果要求的文件的擴展，將線路。把這事的關(guān)系數(shù)據(jù)庫，數(shù)據(jù)是用來設(shè)計的關(guān)系。一張白紙和用戶認為是“一”，被視為“一定出毛病了。想說話，你甚至還不聽你的聲音，想畫一幅畫和一支鉛筆沒有馬克 :不會有反饋”。 d) 有效的態(tài)度組織的產(chǎn)品。 評論 電子商務(wù) (電子商務(wù) )應(yīng)用程序支持不同的黨派之間的參與商業(yè)交易通過網(wǎng)絡(luò)，以及管理數(shù)據(jù)的過程。 這個 項目的目標是建立一個通用電子商業(yè)家商店的任何產(chǎn)品 (如書籍、光盤、電腦、流動電話、電子郵件，和家用電器啟動 )可以從那舒適的家。我愿意承認他們的合作。 為了便于網(wǎng)上購買一輛手推車提供給用戶。 they allow a single copy of the servicing program to service multiple users without starting multiple instances of the program. has introduced many new capabilities to serverside Web programming, including a new category of elements called server controls that generate as many as 200 HTML tags and one or more JavaScript [9] functions from a single server control tag. Server controls support the processing of user events, such as clicking a mouse or entering text at either the client browser or the Web server. Server controls also encourage the separation of programming code into different files and/or areas from the HTML tags and text of a Web page, thus allowing HTML designers and programmers to work together more effectively. 6. Classic ASP pages used ActiveX Data Objects (ADO) to access and modify databases. ADO is a programming interface used to access data. This method was efficient and fairly easy for developers to learn and implement. However, ADO suffered from a dated model for data access with many limitations, such as the inability to transmit data so it is easily and universally accessible. Coupled with the move from standard SQL databases to more distributed types of data (such as XML), Microsoft introduced . Although is known as the next evolution of ADO, it is very different from its predecessor. Whereas ADO was connectionbased, relies on short, XML messagebased interactions with data sources. This makes much more efficient for Interbased applications. A fundamental change from ADO to was the adoption of XML for data exchanges. XML is a textbased markup language, similar to HTML that presents an efficient way to represent data. This allows to reach and exchange. It also gives much better performance because XML data is easily converted to and from any type of data. Another major change is the way interacts with databases. ADO requires “l(fā)ocking” of database resources and lengthy connections for its applications, but does not。s extension. For example, if the requested file has the .asp extension, IIS will route the request to be handled by . If it has the extens ion of .aspx, .ascx, etc, it will route the request to be handled by Engine. Figure 21 Relation between IIS and The Engine then gets the requested file, and if necessary contacts the database through for the required file and then the information is sent back to the Client’s browser. Figure 21 shows how a client browser interacts with the Web server and how the Web server handles the request from client. is a programming framework built on the mon language runtime that can be used on a server to build powerful Web applications. has many advantages – both for programmers and for the end users because it is patible with the .NET Framework. This patibility allows the users to use the following features through : a) Powerful databasedriven functionality: allows programmers to develop web applications that interface with a database. The advantage of is that it is objectoriented and has many programming tools that allow for faster development and more functionality. b) Faster web applications: Two aspects of make it fast piled code and caching. In the code is piled into machine language before a visitor ever es to the website. Caching is the storage of information in memory for faster access in the future. allows programmers to set up pages or areas of pages that are monly reused to be cached for a set period of time to improve the performance of web applications. In addition, allows the caching of data from a database so the website is not slowed down by frequent visits to a database when the data does not change very often. c) Memory leak and crash protection: automatically recovers from memory leaks and errors to make sure that the website is always available to the visitors. also supports code written in more than 25 .NET languages (including , C, and ). This is achieved by the Common Language Runtime (CLR) piler that supports multiple languages. MySQL Database In this project, MySQL is used as the backend database. MySQL is an open source database management system. The features of MySQL are given below: Easy scanning and selecting items in a list. Effective categorical anization of products. MySQL is a relational database management system. A relational database stores information in different tables, rather than in one giant table. These tables can be referenced to each other, to access and maintain data easily. it uses disconnected data sets, which eliminates lengthy connectionsnd database locks. This makes much more scalable because users are not in contention for database resources. In there are two core objects that allow us to work with data initially: the DataReader and the DataSet. In any .NET data access page, before we connect to a database, we first have to import all the necessary namespaces that will allow us to work with the objects required. Namespace in .NET is a set of classes that can be used while creating an