fun with asp.net mvc 3, mef and nuget

Fun with ASP.NET MVC 3, MEF and NuGet

Maarten BalliauwTechnical ConsultantRealDolmen@maartenballiauw

OPN07

Who am I?

Maarten BalliauwAntwerp, Belgiumwww.realdolmen.com Focus on web

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

http://blog.maartenballiauw.be @maartenballiauw

Me, looking intelligent with glasses

Agenda

Technologies & techniques usedASP.NET MVC 3Managed Extensibility Framework (MEF)NuGet

Creating application componentsBuilding an applicationConclusionFurther informationQ&A

ASP.NET MVC 3

All the new stuff:Razor view engineGlobal Action FiltersUnobtrusive Ajax & Client ValidationBetter Visual Studio tooling

And a very interesting one for doing Lego development:

Better support for Dependency Injection

var partA =new PartA(new PartB())

Sidenote: Dependency Injection?

Part A

I need a “Part B” !

Me, doing actual software development

Coming up!

Container

Sidenote: Dependency Injection?

Part A

I need a “Part B” !

Part B

Let me see...

There you go!

How does this fit into ASP.NET MVC 3?

ASP.NET MVC 3 uses DependencyResolver

: IDependencyResolverGetService()GetServices()

Register it on application start

How does this fit in ASP.NET MVC 3?

ASP.NET MVC will / can query the IDependencyResolver for

ControllersView engines & view pagesFiltersModel validatorsModel metadata

Check Brad Wilson’s blog for examples on all of these

http://bradwilson.typepad.com/blog/2010/07/service-location-pt1-introduction.html

Value providersModel bindersController activatorView page activator

Dependency Injection in ASP.NET MVC 3

demo

Managed Extensibility Framework (MEF)

Cool as ICE: Import, Compose, Export

MEF catalogHomeController

[Import]Ilogger logger;

ConsoleLogger

[Export(typeof(Ilogger)]

MEF container

Let me see...

There you go!

Options for MEF in ASP.NET MVC 3

Build an IDependencyResolverbased on MEF container

Use MefContribhas a built-in IDependencyResolverhas a “Convention” modelis available on NuGetmefcontrib.codeplex.com

A brief NuGet introduction...

Package management system for .NETSimplifies incorporating 3rd party librariesDeveloper focusedFree, open source

Use packages from the official feedPublish your own packagesCreate & use your own feed

Using MefContrib

And finding it. On NuGet.

demo

MefContrib.MVC3

Optional addition for MefContribAdds some things to your application:

AppStart code that does the wiringA CompositionDependencyResolverWill check all assemblies in /binWill export everything : IController by convention

Conventions in MefContrib-MVC3public class MvcApplicationRegistry : PartRegistry { public MvcApplicationRegistry() { Scan(x => { x.Assembly(Assembly.GetExecutingAssembly()); x.Directory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "bin")); });

Part() .ForTypesAssignableFrom<IController>() .MakeNonShared() .ExportTypeAs<IController>() .ExportType() .Imports( // ... ); }}

This all makes me think...

Package company components using NuGet?Distribute them in a custom feed?Use ASP.NET MVC 3?Wire everything with MEF & MefContrib?Pure application Lego!

Me, actually thinking

Creating application components

Initech Default Theme

demo

What’s next?

Building itMSBuild (or whatever! Nuget.exe is all that matters)

Hosting itCreate a NuGet serverOr drop everything in a folder

Using itReference the feedDownload & install components neededAssemble using MEF (or another IoC)

Install-Package NuGet.Server

Let’s see if we can build this...

TPS Reports Cover Sheet Generator (ASP.NET MVC 3)

Domain layer

Domain.TpsReports

Authentication

AccountController

Contracts

And their implementations..

.

Theme

Default theme

Packagedas .nupkg

Wiredwith MEF

Building an application

TPS ReportsCover Sheet Generator

demo

Conclusion

You can build an app like a Lego setRequires “bricks” (NuGet packages)Requires “glue” (MEF / MefContrib / other IoC)

Requires you to think in terms of componentsStructure is key!

Not a best-practice architectureJust something we toyed with on a projectProved to work (for the customer)

Further information

For time travelers:FRM06 – Deconstructing Orchard – Bradley Millington – Lagoon L (Tuesday)FRM13 – Scaffolding – Steve Sanderson – Breakers H (Wednesday)

Upcoming:FRM09 – NuGet In Depth – Scott Hanselman & Phil Haack –Lagoon H (now)

On the Internet:www.nuget.orgmefcontrib.codeplex.com

Thank you for joining & filling out the evals!

Q&A

Me, having a question

http://blog.maartenballiauw.be @maartenballiauw

Fun with ASP.NET MVC 3, MEF and NuGet

Maarten BalliauwTechnical ConsultantRealDolmen@maartenballiauw

OPN07

© 2011 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION

IN THIS PRESENTATION.