developing ap.net mvc 3

8/13/2019 developing ap.net mvc 3

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ASP.NET MVC 3Buu Nguyen


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Buu Nguyen

Microsoft MVP (ASP.NET)

Vice President of Technology, KMS Technology

Lecturer, RMIT University Vietnam


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ASP.NET MVC 3 Features

Major Improvements

NuGet

Razor View Engine HTML Helpers

Dependency Injection

Model Validation

Minor Improvements

Sessionless Controllers

ViewBag Property JSON Model Binding

Granular Input Validation

Partial Page Output Cache

Global Action Filters

New Action Result Types


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ASP.NET MVC OVERVIEW


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Technology Stack


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Demo: Travel Log Web App


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NUGET


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NuGet - Package Manager for .NET

Available at http://nuget.codeplex.com/
http://nuget.codeplex.com/http://nuget.codeplex.com/http://nuget.codeplex.com/


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Package Manager Console


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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
http://nuget.org/Contribute/Indexhttp://nuget.org/Contribute/Index


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Demo: Combres NuGet Package


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RAZOR VIEW ENGINE


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Web Forms vs. Razor


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Basic Syntax

Razor ASPX Description

@exp Encode and output an expression to the page

@(exp) Explicit expression, e.g. @(imagePath).jpg

@{ stms; } Execute code statements

@Html.Raw(exp) Output an expression to the page

@* cmt *@ Comment out code block

@if(cond) {

stm;

} else {

stms;}

Execute conditional statements

Other constructs work the same way: @foreach,

@for, @while, @switch, @try etc.


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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


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Transition to Markup

Option 3:

Single line markup

Option 1:

HTML Block

Option 2:

Text Block


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Directives

or


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Functions


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Layout


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_ViewStart.cshtml

Code in _ViewStart.cshtml executes before view rendering

Hierarchical, subfolders override parent folders


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Razor Configuration


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Demo: Razor in Travel Log


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HTML HELPERS


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Declarative HTML Helpers

Alternative way to write reusable rendering blocks

Can be placed into App_Code folder


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New HTML Helpers (both declarative & traditional)

Built-in

Chart

WebGrid WebImage

Crypto

WebMail

microsoft-web-helpers

ReCaptcha

LinkShare

Gravatar

Bing

Analytics

FileUpload

Video

Twitter

FaceBook


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Demo: Declarative Helpers in Travel Log


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DEPENDENCY INJECTION


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Injecting Dependencies into Controllers


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registering & injecting controller factories

injecting controllersControllers

registering & injecting view engines

injecting view pagesViews

locating & injecting filtersAction Filters

registering & injectingModel Binders

registering & injecting

Value Providers

registering & injectingValidation Providers

registering & injectingModel Metadata

Providers

DI Points in ASP.NET MVC 3


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IDependencyResolver


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Activators

Useful when you dont use an IoC container


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Demo: Dependency Injection in Travel Log


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MODEL VALIDATION


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Model Validation

A value must be provided[Required]

Value must be in a given range e.g. 1-10[Range]

Value must satisfy a regular expression[RegularExpression]

Value must be a min length and less than the max length[StringLength]

Value must equal another property e.g. password[Compare]

Value is validated remotely via JSON[Remote]

Custom model validatorsExtensible


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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


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Demo: Remote Validator in Travel Log


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MINOR IMPROVEMENTS


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ViewBag Property

Note: can be used exchangeably with ViewData dictionary


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JSON Model Binding


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Granular Input Validation


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Partial Page Output Cache


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Global Action Filters

Note: all MVC 3 filters are effectively singleton, dont use instance states


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New Action Result Types

HttpNotFoundResult

HttpStatusCodeResult

RedirectPermanent

RedirectToRoutePermanent

RedirectToActionPermanent


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Demo: Apply to Travel Log


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Q&A


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THANK YOU!

[email protected]/blog

www.twitter.com/buunguyen

http://vn.linkedin.com/in/buunguyen

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