ASP.Net

ASP.NET &.NET Environment

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Overview

Part of Microsoft’s .NET environmentUsed for Development of

Websites Internet applicationsWeb Services & XML Web Services

LanguagesVB.NET, C#, J#

Successor of ASP pages (but very different)Event driven rather than script driven

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.NET environment

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.NET environment

Common Language Runtime (CLR) Basis for the .NET environmentCode is compiled to .dll filesA solution can contain code of multiple languages

VersionsVisual Studio (.Net Framework 1.0)Visual Studio 2003 (.Net Framework 1.1)Visual Studio 2005 (.Net Framework 2.0).Net Framework 3.0Visual Studio Orcas (.Net Framework 3.5)

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HISTORY & ChangesVisual Studio .NET (2002) - .Net Framework 1.0Visual Studio 2003 (2003) - .Net Framework 1.1Visual 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 2008 - .Net Framework 3.5 Ajax integration Nested master pages Additional data controls Free versions are available on

http://www.microsoft.com/express/product/default.aspx

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ASP.NET

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ASP.NET Components Interface pagesCode Behind PagesMaster Pages (only .NET 2.0 and higher)User ControlsSitemapStyle SheetsAdditional 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 7

Lets take a look at an example…

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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

http://en.wikipedia.org/wiki/ASP.NET9

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 existReverse-Engineering is possible

Code can be decompiled and can be put live with the actual code

Relatively new10

Comparing .NET to Other Approaches

Much debateMany different opinions usually due to

different backgrounds…

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http://www.promoteware.com/Module/Article/ArticleView.aspx?id=10

http://www.oracle.com/technology/pub/articles/hull_asp.html 12

J2EE vs. Microsoft.NET - A comparison of building XML-based web services By Chad Vawter and Ed Roman June 2001 Prepared for Sun Microsystems, Inc.

.NET has a simpler programming model, enabling rank-and-file developers to be productive without shooting themselves in the foot

.NET gives you language neutrality when developing new eBusiness applications, whereas J2EE makes you treat other languages as separate applications

.NET benefits from being strongly interweaved with the underlying operating system

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Conclusion:

Depends…what you want to accomplish and what is the programmers background

There are many tools existent to combine the different approaches

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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 webpagehttp://www.asp.net/ajax/Concerns:

Due to the nature of ajax, some of the analytics services, back buttons or search engine optimizations may not work as expected

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Dot Net Nuke

Free ToolUsed to set up WebPages with some

commonly used elementsBased on the .NET environment

demo.dotnetnuke.com/dnndemo

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Questions???

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