www.dev-one.com
ASP.NET MVC
Fabian Vilers
Twitter: @fvilers
Hands on
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AGENDA
 Presentation
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What is MVC?
MVC on the web today
ASP.NET MVC
Timeline
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What web forms does well
Where web forms doesn’t fit
ASP.NET MVC believes
Should you fear ASP.NET MVC?
 Comparison with ASP.NET web forms
 The MVC pattern
 Model
 View
 Controller
 What’s new in ASP.NET MVC 3
 Demos
 Q & A
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PRESENTATION
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WHAT IS MVC?
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The MVC pattern is 30+ years old!
It is a powerful and elegant means of separating concerns
It makes it easier to test application
It promotes parallel development thanks to the loose
coupling between the three main components
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MVC ON THE WEB TODAY
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Ruby on Rails
Django and Python
Spring, Struts and Java
Zend Framework and PHP
MonoRail
…
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ASP.NET MVC
 Separation of application tasks (input logic, business logic,
and UI logic), testability, and test -driven development (TDD)
by default
 An extensible and pluggable framework
 A powerful URL-mapping component that lets you build
applications that have comprehensible and searchable URLs
 Convention over configuration
 Don’t repeat yourself, keep it simple (DRY/KISS principles)
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TIMELINE
• ScottGu sketched
out the core of
ASP.NET MVC
(~100 lines of
code)
February 2007
September
2007
• Presenstation of
Scalene at the
Austin ALT.NET
conference
• First Community
Technology
Preview
March 2009
• ASP.NET MVC 1.0
• ASP.NET MVC
source code was
released under
the MS-PL
December 2007
April 2009
ASP.NET MVC – Hands on
March 2010
• ASP.NET MVC 2.0
• Shipped with
Visual Studio 2010
• ASP.NET MVC 3.0
• Shipped with
Visual Studio 2010
January 2011
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COMPARISON WITH
ASP.NET WEB FORMS
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WHAT WEB FORMS DOES WELL
 Represent a Page as control tree
 Give these ser ver-side controls events like their desktop
counterparts
 Hide as much HTTP and HTML as is reasonable
 Make state management as transparent as possible
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WHERE WEB FORMS DOESN’ T FIT
ViewState is powerful, but it has its drawbacks (weight,…)
Page life cycle can be a nightmare
Limited control over HTML
Client IDs and the c t l 0 0 $ C o n t e n t P l a c e H o l d e r 1 $ U s e r C o n t r o l 1 $ T e x t B o x 1
syndrome
 It’s nearly impossible to run a Web Form through its life
cycle outside IIS
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ASP.NET MVC BELIEVES
 Guiding tenets:
 Be extensible, maintainable, and flexible
 Be testable
 Get out of the user ’s way when necessary
 Ser ving methods, not files
 Separation of concerns
 ScottHa said: « ASP.NET MVC is Web Forms unplugged »
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SHOULD YOU FEAR ASP.NET MVC?
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ASP.NET MVC is built on top of ASP.NET
ASP.NET MVC is not a replacement for anything
It is just an alternative
It’s a totally different approach
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THE MVC PATTERN
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THE MVC PATTERN
 Model
 objects are the parts of the
application that implement
the logic for the application’s
data domain
 View
 components that display the
application’s user interface
 Controller
 components that handle user
interaction, work with the
model, and ultimately select a
view to render
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MODEL
 Business logic and validation of the application’s data
domain
 Totally independant from the views or the controllers
 Model state can be stored in memor y, database, XML files,…
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VIEW
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Application’s user interface using data from the model
No interaction with the models or the controllers
Views can be strongly typed
Almost no code
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CONTROLLER
 Handle user interaction
 Quer y the model
 Select the right view to render
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WHAT’S NEW IN
ASP.NET MVC 3
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WHAT’S NEW IN ASP.NET MVC 3
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Razor View Engine
Suppor t for multiple view engine
Global action filters
« ViewBag » proper ty
New « ActionResult » types
JavaScript and A JAX improvements
Client-side validation enabled by default
Remote validator
JSON binding suppor t
Data annotations metadata attributes
Validation interfaces
Dependency injection improvements
Par tial-Page Output Caching
Granular Control over Request Validation
…
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DEMOS
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BOOK STORE
 Using the ASP.NET MVC 3 template and playing around with
Razor
 First data access and display a list of authors
 Manage authors
 Display a list of books
 Create and edit a book using the ViewModel pattern
 Source code available on: http://vil.rs/qK3rMG
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Q&A
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