ASP.NET 3.5 and Visual Studio 2008
ASP.NET 3.5 and Visual Studio 2008 bring great new functionality around Web development and design that makes building standards based, next generation Web sites easier than ever. From the inclusion of ASP.NET AJAX into the runtime, to new controls, the new LINQ data capabilities, to improved support for CSS, JavaScript and others, Web development has taken a significant step forward.
ASP.NET 3.5 and Visual Studio 2008為基于Web的開(kāi)發(fā)和設計，帶來(lái)了巨大的功能性變化，這使得創(chuàng )建標準Web程序比以前更容易。在運行時(shí)中包含的ASP.NET AJAX，增加了新的控件，新的LINQ數據數據能力，增強了對CSS、JavaScript和其他內容的支持，Web開(kāi)發(fā)人員從此邁出了更為重要的一步。
ASP.NET 3.5的新特性：
1．ASP.NET AJAX
With ASP.NET AJAX, developers can quickly create pages with sophisticated, responsive user interfaces and more efficient client-server communication by simply adding a few server controls to their pages. Previously an extension to the ASP.NET runtime, ASP.NET AJAX is now built into the platform and makes the complicated task of building cross-platform, standards based AJAX applications easy.
使用AJAX，開(kāi)發(fā)人員可以快速的創(chuàng )建靈活多變、快速響應得用戶(hù)界面，而實(shí)現這些功能，只需要在頁(yè)面中添加幾個(gè)服務(wù)器控件，以前AJAX只是ASP.NET運行時(shí)的一個(gè)擴展，現在它被集成在.NET平臺上，而且能夠完成更負責的跨平臺任務(wù)，創(chuàng )建標準的AJAX應用程序變得更簡(jiǎn)單。
2．LINQ and other .NET Framework 3.5 Improvements
With the addition of Language Integrated Query (LINQ) in .NET Framework 3.5, the process of building SQL queries using error-prone string manipulation is a thing of the past. LINQ makes your relational data queries a first-class language construct in C# and Visual Basic, complete with compiler and Intellisense support. For Web applications, the ASP.NET LinqDataSource control allows you to easily use LINQ to filter, order and group data that can then be bound to any of the data visualization controls like the ListView and GridView controls. In addition, all the other improvements to .NET Framework 3.5, including the new HashSet collection, DateTime offset support, diagnostics, garbage collection, better thread lock support, and more, are all available to you in your ASP.NET applications.
NET Framework 3.5中增加了LINQ查詢(xún)語(yǔ)言，以前我們在使用SQL查詢(xún)字符串時(shí)總是容易出錯，現在，LINQ為C#和VB提供了更安全的架構，并提供更智能的支持。對于Web應用程序，ASP.NET中的LinqDataSource數據源控件允許我們輕松的去查詢(xún)、過(guò)濾等數據操作。.NET Framework 3.5其他的特性還包括：HashSet集合，DateTime offset支持，diagnostics異常（診斷）處理，garbage（垃圾回收）集合，更好的線(xiàn)程鎖定支持等等。這里的garbage聽(tīng)起來(lái)很像Java的GC，不知道是不是呢，試驗下就知道了。
3．WCF Support for RSS, JSON, POX and Partial Trust
With .NET Framework 3.5, Windows Communication Foundation (WCF) now supports building Web services that can be exposed using any number of the Internet standard protocols, such as SOAP, RSS, JSON, POX and more. Whether you are building an AJAX application that uses JSON, providing syndication of your data via RSS, or building a standard SOAP Web service, WCF makes it easy to create your endpoints, and now, with .NET Framework 3.5, supports building Web services in partial-trust situations like a typical shared-hosting environment.
在.NET Framework 3.5中，WCF支持創(chuàng )建Web服務(wù)（被大多數網(wǎng)絡(luò )標準協(xié)議支持，如SOAP,RSS,JSON,POX等），無(wú)論你是使用JSON開(kāi)發(fā)AJAX程序，還是RSS，或是標準的SOAP Web服務(wù)。 WCF使你可以輕松的創(chuàng )建終端程序，現在，.NET Framework 3.5還支持在局部信任領(lǐng)域（類(lèi)似一個(gè)典型的主機共享環(huán)境）創(chuàng )建Web服務(wù)。
Visual Studio 2008的新特性
1．New Web Design Interface
Visual Studio 2008 has incorporated a new Web designer that uses the design engine from Expression Web. Moving between design and source view is faster than ever and the new split view capability means you can edit the HTML source and simultaneously see the results on the page. Support for style sheets in separate files has been added as well as a CSS properties pane which clarifies the sometimes-complex hierarchy of cascading styles, so that it is easy to understand why an element looks the way it does. In addition Visual Studio 2008 has full WYSIWYG support for building and using ASP.NET Nested Master Pages which greatly improves the ability to build a Web site with a consistent look and feel.
Visual Studio 2008提供了新的界面，這也算是VS一貫的做法了（界面風(fēng)格每次都在變）。VS2008去除了設計器和源代碼視圖，這使得打開(kāi)VS2008的界面比以前更快。新的分割視圖，允許你編輯HTML源代碼，并查看頁(yè)面效果。對層疊樣式表的支持能力大大增強?？丶臉邮娇梢粤⒖田@現出來(lái)，這也是鼎鼎大名的WYSIWYG（所見(jiàn)即所得）。VS2008支持嵌套母版頁(yè)開(kāi)發(fā)，這樣的頁(yè)面看起來(lái)，會(huì )有什么樣的效果呢，自己下載一個(gè)版本看看吧。
2．JavaScript Debugging and Intellisense
In Visual Studio 2008, client-side JavaScript has now become a first-class citizen in regards to its debugging and Intellisense support. Not only does the Intellisense give standard JavaScript keyword support, but it will automatically infer variable types and provide method, property and event support from any number of included script files. Similarly, the JavaScript debugging support now allows for the deep Watch and Locals support in JavaScript that you are accustomed to having in other languages in Visual Studio. And despite the dynamic nature of a lot of JavaScript, you will always be able to visualize and step into the JavaScript code, no matter where it is generated from. This is especially convenient when building ASP.NET AJAX applications.
在VS2008中，客戶(hù)端不再僅僅支持標準JavaScript的對象，而且能自動(dòng)地顯示那些自定義的變量和方法，更強的腳本調試功能（具體什么自己測試下）。
3．Multi-targeting Support
In previous versions of Visual Studio, you could only build projects that targeted a single version of the .NET Framework. With Visual Studio 2008, we have introduced the concept of Multi-targeting. Through a simple drop-down, you can decide if you want a project to target .NET Framework 2.0, 3.0 or 3.5. The builds, the Intellisense, the toolbox, etc. will all adjust to the feature set of the specific version of the .NET Framework which you choose. This allows you to take advantage of the new features in Visual Studio 2008, like the Web design interface, and the improved JavaScript support, and still build your projects for their current runtime version.
在以前的VS中，你只能創(chuàng )建一個(gè)版本下的工程（如只能創(chuàng )建2.0版本或1.1版本），在VS2008中，我們可以包含多個(gè)版本了，通過(guò)一個(gè)簡(jiǎn)單的下拉操作，你就可以決定要創(chuàng )建哪個(gè)版本下的項目（包括2.0，3.0，3.5）。不管采用哪個(gè)版本，你都可以使用VS2008提供的新功能，如在Web開(kāi)發(fā)中，你可以在舊的項目中，使用VS2008提供的對JavaScript的支持。
