ASP.NET MVC 3

ASP.NET MVC 3Buu Nguyen

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

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

ASP.NET MVC OVERVIEW

Technology Stack

Demo: Travel Log Web App

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

Package Manager Console

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

Demo: Combres NuGet Package

RAZOR VIEW ENGINE

Web Forms vs. Razor

Basic SyntaxRazor 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; } %>

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

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

Directivesor

Functions

Layout

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

Razor Configuration

Demo: Razor in Travel Log

HTML HELPERS

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

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

Demo: Declarative Helpers in Travel Log

DEPENDENCY INJECTION

Injecting Dependencies into Controllers

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

IDependencyResolver

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

Demo: Dependency Injection in Travel Log

MODEL VALIDATION

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

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

Demo: Remote Validator in Travel Log

MINOR IMPROVEMENTS

Sessionless Controllers

ViewBag PropertyNote: can be used exchangeably with ViewData dictionary

JSON Model Binding

Granular Input Validation

Partial Page Output Cache

Global Action FiltersNote: all MVC 3 filters are effectively singleton, don’t use instance states

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

Demo: Apply to Travel Log

THANK YOU!buunguyen@kms-technology.comwww.buunguyen.net/blogwww.twitter.com/buunguyenhttp://vn.linkedin.com/in/buunguyen

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ASP.NET MVC 3

by Buu Nguyen on Mar 19, 2011

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ASP.NET MVC 3 — Presentation Transcript