Slides for my speech at Microsoft Technology Conference in Hanoi, Vietnam, March 2011

1. ASP.NET MVC 3
Buu Nguyen

2. Buu Nguyen
• Microsoft MVP (ASP.NET)
• Vice President of Technology, KMS Technology
• Lecturer, RMIT University Vietnam

3. ASP.NET MVC 3 Features
Major Improvements Minor Improvements
• NuGet • Sessionless Controllers
• Razor View Engine • ViewBag Property
• HTML Helpers • JSON Model Binding
• Dependency Injection • Granular Input Validation
• Model Validation • Partial Page Output Cache
• Global Action Filters
• New Action Result Types

4. ASP.NET MVC OVERVIEW

5. Technology Stack

7. Demo: Travel Log Web App

8. NUGET

9. NuGet - Package Manager for .NET
• Available at http://nuget.codeplex.com/

10. Package Manager Console

11. Building NuGet Package
• Authoring support
• Define dependencies
• Transform configuration file and source
• Add initialization to web app startup via WebActivator
• Contribute at http://nuget.org/Contribute/Index

12. Demo: Combres NuGet Package

13. RAZOR VIEW ENGINE

14. Web Forms vs. Razor

15. Basic Syntax
Razor ASPX Description
@exp <%: exp %> Encode and output an expression to the page
@(exp) <%: exp %> Explicit expression, e.g. @(imagePath).jpg
@{ stms; } <% stms; %> Execute code statements
@Html.Raw(exp) <%= exp %> Output an expression to the page
@* cmt *@ <%-- cmt --%> Comment out code block
@if(cond) { <% Execute conditional statements
stm; if (cond) {
} else { stms; Other constructs work the same way: @foreach,
stms; } else {
@for, @while, @switch, @try etc.
} stms;
}
%>

16. Transition to Code
• As soon as Razor parser encounters the syntax mentioned in
Basic Syntax, it switches to code mode
• Escape @ by using @@, e.g. Tweets by @@buunguyen

17. Transition to Markup
Option 1:
HTML Block
Option 2:
Text Block
Option 3:
Single line markup

18. Directives
or

19. Functions

20. Layout

21. _ViewStart.cshtml
• Code in _ViewStart.cshtml executes before view rendering
• Hierarchical, subfolders override parent folders

22. Razor Configuration

23. Demo: Razor in Travel Log

24. HTML HELPERS

25. Declarative HTML Helpers
• Alternative way to write reusable rendering blocks
• Can be placed into App_Code folder

26. New HTML Helpers (both declarative & traditional)
Built-in microsoft-web-helpers
• Chart • ReCaptcha
• WebGrid • LinkShare
• WebImage • Gravatar
• Bing
• Crypto
• Analytics
• WebMail
• FileUpload
• Video
• Twitter
• FaceBook

27. Demo: Declarative Helpers in Travel Log

28. DEPENDENCY INJECTION

29. Injecting Dependencies into Controllers

30. DI Points in ASP.NET MVC 3
• registering & injecting controller factories
Controllers • injecting controllers
• registering & injecting view engines
Views • injecting view pages
Action Filters • locating & injecting filters
Model Binders • registering & injecting
Value Providers • registering & injecting
Validation Providers • registering & injecting
Model Metadata • registering & injecting
Providers

31. IDependencyResolver

32. Activators
• Useful when you don’t use an IoC container

33. Demo: Dependency Injection in Travel Log

34. MODEL VALIDATION

35. Model Validation
[Required] • A value must be provided
[Range] • Value must be in a given range e.g. 1-10
[RegularExpression] • Value must satisfy a regular expression
[StringLength] • Value must be a min length and less than the max length
[Compare] • Value must equal another property e.g. password
[Remote] • Value is validated remotely via JSON
Extensible… • Custom model validators

36. Other Validation Improvements
• Self-validating model with IValidatableObject
• ValidationContext for multi-property validation
• Client-validation is enabled by default
• jQuery Validate plugin is used by default
• Unobtrusive client-side validation
• EF4 CTP5 works with validation attributes

37. Demo: Remote Validator in Travel Log

38. MINOR IMPROVEMENTS

39. Sessionless Controllers

40. ViewBag Property
Note: can be used exchangeably with ViewData dictionary

41. JSON Model Binding

42. Granular Input Validation

43. Partial Page Output Cache

44. Global Action Filters
Note: all MVC 3 filters are effectively singleton, don’t use instance states

45. New Action Result Types
• HttpNotFoundResult
• HttpStatusCodeResult
• RedirectPermanent
• RedirectToRoutePermanent
• RedirectToActionPermanent

46. Demo: Apply to Travel Log

47. Q&A

48. THANK YOU!
buunguyen@kms-technology.com
www.buunguyen.net/blog
www.twitter.com/buunguyen
http://vn.linkedin.com/in/buunguyen