MSDN - ASP.NET MVC

ASP.NET MVC (model-view-controller) Maarten Balliauw – RealDolmen http://blog.maartenballiauw.be

Who am I?

Maarten Balliauw

Antwerp, Belgium

www.realdolmen.com

Focus on web

ASP.NET, ASP.NET MVC, PHP, Azure, VSTS, …

http://blog.maartenballiauw.be

http://twitter.com/maartenballiauw

Agenda

Overview of ASP.NET

ASP.NET MVC

Building an application

Unit testing

Should I choose Webforms or MVC?

Q&A

ASP.NET…

“ one web application framework to rule them all”

Always seen as one whole…

ASP.NET Caching Modules Handlers Intrinsics Pages Controls Globalization Profile Master Pages Membership Roles Etc.

Look at it differently!

Core infrastructure

Different presentation options

Presentation Runtime ASP.NET Dynamic Data ASP.NET WebForms ASP.NET MVC ASP.NET Core

ASP.NET MVC

A new presentation option for ASP.NET

Simpler way to program ASP.NET

Easily testable and TDD friendly

More control over your <html/>

More control over your URLs

Not for everyone! (car vs. motorcycle)

Not a replacement for webforms!

Supports existing ASP.NET features

Things you will lose…

Viewstate

Postbacks

Tricky interview questions about nuances of the page lifecycle 

MVC? Model-View-Controller! Separation of concerns! Controller (Input) Model (Logic) View (Presentation)

What does an MVC request look like? Controller Handles input (HTTP requests) View Visually represents the model ViewData Request View Controller Response

DEMO File > New…

Framework Goals

Easy and frictionless testability

Full control over your <html/>

Full control over your URLs

Leverage existing ASP.NET features

Conventions and guidance

…

Clean URLs

Would you use:

/Products.aspx?CategoryID={3F2504E0-4F89-11D3-9A0C-0305E82C3301}

Or:

/Products/Books

My Favorite

Extensibility

These come into play…

… and are all replacable!

Controller Builder Controller Factory Controller View Engine View Controller Action Invoker Action Result Action Filters Model Binders

DEMO

Building an ASP.NET MVC application

Testing

Has anyone tried testing webforms?

Without IIS being fired up?

Each component tested individually?

Did you require vacation afterwards?

Infrastructure designed for testing

These are all easily mockable!

HttpContextBase, HttpResponseBase, HttpRequestBase

Extensibility

IController

IControllerFactory

IRouteHandler

IViewEngine, IView

Testing controller actions

No requirement to test within ASP.NET runtime!

Can mock parts of runtime you want to fake

Using Moq, Rhino, TypeMock, …

http://code.google.com/p/moq/

[TestMethod] public void ShowPostsDisplayPostView() { BlogController controller = new BlogController(…); var result = controller.ShowPost(2) as ViewResult; Assert.IsNotNull(result); Assert.AreEqual(result.ViewData[ " Message " ], " Hello " ); }

Testing controller actions using Moq

More on Mocking? Visit VISUG on May 7, 2009 – www.visug.be)

[TestMethod] public void TestInvalidCredentials() { LoginController controller = new LoginController(); var mock = new Mock<System.Web.Security.MembershipProvider>(); mock.Expect(m => m.ValidateUser("", "")).Returns(false); controller.MembershipProviderInstance = mock.Object; var result = controller.Authenticate("", "") as ViewResult; Assert.IsNotNull(result); Assert.AreEqual(result.ViewName, "Index"); Assert.AreEqual(controller.ViewData["ErrorMessage"], "Invalid credentials! Please verify your username and password."); }

Testing frameworks

Any framework is supported!

Visual Studio Test

NUnit

XUnit

MBUnit

…

DEMO

Unit testing

Choosing between Webforms and MVC

ASP.NET Webforms

Winforms-alike event model

Familiar controls

Familiar = rapid application development

Functionality per page

Uses viewstate for state management

Less control over rendered HTML

ASP.NET MVC

Less complex: separation of concerns

Easier parallel development

TDD support

No viewstate, …

Full control over behavior and HTML

Makes you think

So what do I choose?

Go with the flow!

Remember: mixing of worlds is possible!

Mixing with ASP.NET Webforms

Mixing with dynamic data

…

Takeaways

A new option for ASP.NET

Not a replacement for Webforms!

More control over your <html/> and URLs

Strong, frictionless testability

Resources

“ ASP.NET MVC 1.0 Quickly” http://tinyurl.com/mvcquickly

My blog http://blog.maartenballiauw.be/category/MVC.aspx

Microsoft http://www.asp.net/mvc http://wiki.asp.net/page.aspx/286/aspnet-mvc-framework/

http://blog.wekeroad.com/blog/i-spose-ill-just-say-it-you-should-learn-mvc/

Community projects http://mvccontrib.codeplex.com http://mvcsitemap.codeplex.com

Questions and Answers

http://blog.maartenballiauw.be

[email_address]

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