ASP.NET &.NET Environment

Overview Part of Microsoft’s.NET environment Used for Development of  Websites  Internet applications  Web Services & XML Web Services Languages  VB.NET, C#, J# Successor of ASP pages (but very different) Event driven rather than script driven

.NET environment

Common Language Runtime (CLR)  Basis for the.NET environment  Code is compiled to.dll files  A solution can contain code of multiple languages Versions  Visual Studio (.Net Framework 1.0)  Visual Studio 2003 (.Net Framework 1.1)  Visual Studio 2005 (.Net Framework 2.0) .Net Framework 3.0  Visual Studio 2008 (.Net Framework 3.5)  Visual Studio 2010 Beta (.Net Framework 4.0)

HISTORY & Changes Visual Studio.NET (2002) -.Net Framework 1.0 Visual Studio 2003 (2003) -.Net Framework 1.1 Visual Studio 2005 (2005) -.Net Framework 2.0/3.0  Many new features  New Data Controls (GridView, FormView, DetailsView)  Navigation Controls  Master Pages  Login controls  Themes  Skins  Allows full pre-compilation Visual Studio Net Framework 3.5  Ajax integration  Nested master pages  Additional data controls  Free versions are available on Visual Studio 2010 Beta -.Net Framework 4.0

ASP.NET

ASP.NET Components Interface pages Code Behind Pages Master Pages (only.NET 2.0 and higher) User Controls Sitemap Style Sheets Additional Components for.Net 3.0  Windows Presentation Foundation - advanced graphics  Windows Communication Foundation – allows programs to act more like web services using a service-oriented messaging system  Windows Workflow Foundation  Windows CardSpace AJAX

Lets take a look at an example…

Advantages Faster than script-based languages since it is converted into precompiled dlls Easier error handling (caught before run-time, allows try-catch blocks) Can use existing controls and templates provided An extensive set of controls and class libraries allows the rapid building of applications. The Code-behind the interfaces can be coded in the language of preference Ability to cache the whole page or just parts of it to improve performance. Ability to separate the looks of the page and the code-behind. The CLR will take care of garbage collection, and other basic functions

Disadvantages Platform limitations  E.g..Net framework 2.0 has the following system requirements: Supported Operating Systems: Windows 2000 Service Pack 3; Windows 98; Windows 98 Second Edition; Windows ME; Windows Server 2003; Windows XP Service Pack 2 High memory usage and it can be slow at execution Some backward and forward incompatibilities exist Reverse-Engineering is possible  Code can be decompiled and can be put live with the actual code Relatively new

Comparing.NET to Other Approaches Much debate Many different opinions usually due to different backgrounds …

Conclusion: Depends …what you want to accomplish and what is the programmers background There are many tools existent to combine the different approaches

AJAX (Asynchronous JavaScript and Xml) Framework that can be used with web applications (build-in in.netframework 3.5) Increases responsiveness by only refreshing parts of a webpage Concerns:  Due to the nature of ajax, some of the analytics services, back buttons or search engine optimizations may not work as expected

Dot Net Nuke Free Tool Used to set up WebPages with some commonly used elements Based on the.NET environment demo.dotnetnuke.com/dnndemo

Questions???