【正文】 it is a stackallocated type that can implement interfaces but does not support inheritance. In addition to these basic objectoriented principles, C facilitates the development of software ponents through several innovative language constructs, including: ? Encapsulated method signatures called delegates, which enable typesafe event notifications. ? Properties, which serve as accessors for private member variables. ? Attributes, which provide declarative metadata about types at run time. ? Inline XML documentation ments. If you need to interact with other Windows software such as COM objects or native Win32 DLLs, you can do this in C through a process called Interop. Interop 19 enables C programs to do just about anything that a native C++ application can do. C even supports pointers and the concept of unsafe code for those cases in which direct memory access is absolutely critical. The C build process is simple pared to C and C++ and more flexible than in Java. There are no separate header files, and no requirement that methods and types be declared in a particular order. A C source file may define any number of classes, structs, interfaces, and events. C programs run on the .NET Framework, an integral ponent of Windows that includes a virtual execution system called the mon language runtime (CLR) and a unified set of class libraries. The CLR is Microsoft39。 Web servers can be achieved. In the process of achieving website, technology selection is very important. Former major use HTML language, the stronger the interactive website, the proposed use of ASP, JSP, PHP and other programming to help achieve, the more plex Web site may also have its own database. The latter is based on all kinds of different operating systems used Web server software installation and debugging. This stage is the whole process of the most important and most timeconsuming part. When we pleted the work, the need for website released. At this stage of the production on the website drawing to a close, the main task is to do a good job in the website release to the work, the web site for final modifications, testing, homepage can guarantee normal operation of the work. Published in the website after website to deal with various aspects of the tests, including the possibility of any different web browsers, different visitors have shown normal, ASP, JSP, PHP normal procedure can work, and so on. This stage is the website of trial operation period, the website at this time should be to make up for various shortings, the website will be more perfected. After a period of operation, the site entered the normal operation period, the main task is to update outdated information website, the visitor39。 (3) Visual Design。s work and lifestyle, the Inter, openness and sharing of information model, breaking the traditional mode of information dissemination many barriers for people with new opportunities. With puters and the advent of the information age, the pace of the advance of human society in gradually accelerated. In recent years the development of web design, fast people occupied. With the development of web design, a colorful online website together one scenic beauty. To design aesthetic and practical web site should be thoroughly master the building techniques. In building site, we analyzed the websites of objectives, contents, functions, structure, the application of more web design technology. 2, the definition of website How definition of websites Web site identified the tasks and objectives, the building site is the most important issue. Why people will e to your website? You have a unique service? The first people to your website is to what? They will e back? All these issues must be taken into account when the site definition of the problem. Definition site to, first of all, the entire site must have a clear understanding of what the design should understand in the end, the main purpose of the mission, how to carry out the task of anization and planning. Second, to maintain the highquality Web site. Many websites in the face of strong petition from highquality product is the greatest longterm petitive advantage. An excellent Web site should have the following: (1) users visit Web site is faster. (2) attention to the feedback and updates. To update the content of the website and timely feedback the user39。典型的 C 應(yīng)用程序使用 .NET Framework 類庫廣泛地處理常見的 “ 日常 ” 任務(wù)。 9 語言互操作性是 .NET Framework 的一個關(guān)鍵功能。然后，如果符合安全要求， CLR 執(zhí)行實時 (JIT) 編譯以將 IL 代碼轉(zhuǎn)換為本機機器指令。 用 C 編寫的源代碼被編譯為一種符合 CLI 規(guī)范的中間語言 (IL)。 C 源文件可以定義任意數(shù)量的類、結(jié)構(gòu)、接口和事件?；ゲ僮魇? C 程序能夠完 8 成本機 C++ 應(yīng)用程序可以完成的幾乎任何任務(wù)。 ? 屬性 (Property)，充當私有成員變量的訪問器。類可能直接從一個父類繼承，但它可以實現(xiàn)任意數(shù)量的接口。 C 還支持泛型方法和類型，從而提供了更出色的類型安全和性能。 C 語法表現(xiàn)力強，只有不到 90 個關(guān)鍵字 ，而且簡單易學(xué)。使用設(shè)計器可以為控件生成設(shè)計時用戶界面，這樣開發(fā)人員可以在可視化設(shè)計工具中配置控件的屬性和內(nèi)容。 包括一個可擴展的宿主環(huán)境，該環(huán)境控制應(yīng)用程序的生命周期，即從用戶首次訪問此應(yīng)用程序中的資源（例如頁）到應(yīng)用程序關(guān)閉這一 期間。 支持 XML Web services。這些事件顯示診斷和監(jiān)視特征的組合，并在記錄哪些事件以及如何記錄事件等方面提供了高度的靈活性。由于這些 XML 文件是 6 ASCII 文本文件，因此對 Web 應(yīng)用程序進行配置更改比較簡單。 提供了分布式狀態(tài)功能，使您能夠管理一臺計算機或數(shù)臺計算機上同一應(yīng)用程序的多個實例的狀態(tài)信息。 始終使用特定的 Windows 標識運行，因此，您可以通過使用 Windows 功能（例如 NTFS 訪問控制列表 (ACL)、數(shù)據(jù)庫權(quán)限等等）來保護應(yīng)用程序的安全。 除了 .NET 的安全功能外， 還提 供了高級的安全基礎(chǔ)結(jié)構(gòu)，以便對用戶進行身份驗證和授權(quán)，并執(zhí)行其他與安全相關(guān)的功能。當用戶請求內(nèi)容頁 5 時，這些內(nèi)容頁與母版頁合并，產(chǎn)生將母版頁的布局與內(nèi)容頁中的內(nèi)容組合在一起的輸出。可以先定義主題和外觀，然后在頁面級或控件級應(yīng)用這些主題和外觀。 使用 頁和控件框架還可以將常用的 UI 功能封裝成易于使用且可重用的控件。 網(wǎng)頁是完全面向?qū)ο蟮?。可以從任何瀏覽器或客戶端設(shè)備請求 網(wǎng)頁， 會向請求瀏覽器呈現(xiàn)標記（例如 HTML）。當您編寫 應(yīng)用程序的代碼時，可以訪問 .NET Framework 中的類。 以上就是建站要大體遵循的七個步驟，這七個步驟是相輔相成的，但可根據(jù)網(wǎng)頁的難易程度和復(fù)雜度適當增強或減弱某個環(huán)節(jié)。到了這個階段，網(wǎng)頁制作就接近尾聲，主要工作是把做好的網(wǎng)頁發(fā)布到網(wǎng)絡(luò)上，對網(wǎng)頁作最后的修改、測試，保證網(wǎng)頁能在網(wǎng)絡(luò)上正常地運行。前者主要使用 HTML 語言，對于交互性較強的網(wǎng)站來說，建議采用 ASP、JSP、 PHP 等編程來輔助實現(xiàn)，更為復(fù)雜的網(wǎng)站可能還會有自己的數(shù)據(jù)庫。這個過程是整個網(wǎng)站規(guī)劃中的關(guān)鍵。 在進行完系統(tǒng)分析之后，我們就應(yīng)該進行系統(tǒng)的設(shè)計。它是眾多腳本語言中較為優(yōu)秀的一種。 應(yīng)用 javascript 設(shè)計網(wǎng)頁 javascript 的出現(xiàn)使得信息和用戶之間不僅只是一種顯示和瀏覽的關(guān)系 ,而是實現(xiàn)了一種