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ASP.NET ROUTING DEEP DIVE

Stacy VicknairSparkhound

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Welcome to Houston TechFest

• Please turn off all electronic devices or set them to vibrate.• If you must take a phone call, please do so in the lobby so as not

to disturb others.• Thanks to our Diamond Sponsors:

Thank you for being a part of the 7th Annual Houston TechFest!

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Information• Speaker presentation slides will be available at

www.houstontechfest.org within a week

• Don’t forget to complete the Bingo card to be eligible for door prizes

ABOUT MEStacy Vicknair, MVPSenior Development Consultant

Bloghttp://www.wtfnext.com

Toastmastershttp://www.toastmasters.orghttp://www.batonrougespeaks.com

Twitter: @svicknEmail: stacy.vicknair@sparkhound.com

“BE A HERO. GROW A BEARD.”The Sparkhound Foundation is sponsoring the growth of facial hair to raise Prostate Cancer Awareness.

Through Septembeard we will raise funds for the research and treatment of prostate cancer.

Want to join us? Learn more at Septembeard.org.

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Agenda• What Is Routing?• Out of the Box ASP.NET MVC Routing• Customizing ASP.NET MVC Routing• Unit Testing ASP.NET MVC Routes• Routing In ASP.NET WebForms• Helpful Links

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What is ASP.NET Routing?

“ASP.NET routing enables you to use URLs that do not have to map to specific files in a Web site.”

- http://msdn.microsoft.com/en-us/library/cc668201.aspx

www.mysite.com/categories.aspx?categoryName=sports

www.mysite.com/categories/sports

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HttpModules and HttpHandlers

Http Module 1

Http Module 2

Http Module 3

Http Handler

Http Handler

Http Handler

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ASP.NET Routing (System.Web.Routing)

UrlRoutingModuleIHttpModule

PageRouteHandlerIRouteHandler

UrlRoutingHandlerIHttpHandler

Content (Page, etc.)

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DefaultControllerFactoryIControllerFactory

ASP.NET MVC Routing (System.Web.Mvc)

UrlRoutingModuleIHttpModule

MvcRouteHandlerIRouteHandler

MvcHandlerUrlRoutingHandler

MyController.Execute()Controller

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Out of the box MVC Routing• Routes.IgnoreRoute()– System.Web.Routing.StopRoutingHandler

• Routes.MapRoute()– System.Web.Mvc.RouteCollectionExtensions– Parameters• string name – “MyUniqueName”• string url – “{controller}/{action}/{id}”• Object defaults -

new { controller = "Home", action = "Index”} • Object constraints – new {id = “[0-9]+”}• string[] namespaces - new[] { "MyProject.MyControllers"} 1

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DEMO – Out of the box MVC Routing

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Customizing ASP.NET MVC Routing• Three main areas for routing customization– RouteConstraints

• Implementing constraints that require more logic than RegEx• Created by implementing

System.Web.Routing.IRouteConstraint

– Routes• Allow for control over how route data is parsed or route paths

are determined• Created by subclassing System.Web.Routing.RouteBase• Default is Route ex. RouteCollection.Add(new Route(…))

– RouteHandlers• Allow for preprocessing before default RouteHandler behavior

– ex. RouteData modifications

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DEMO – RouteConstraints and Routes

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Unit Testing Routes• Use RouteTable.Routes.GetRouteData()– Requires mocked HttpContext (to provide the URL)

• Enumerate over RouteData to ensure the proper information is returned

• Alternative is MVCContrib– string.ShouldMapTo<T>(c => c.Action());– Not “officially” ported to MVC4 by Ndepend yet.• Search NuGet for MvcContrib.Mvc4 to find a port

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DEMO – Unit Testing with Routes

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Adding Routing to ASP.NET WebForms• In the Global.asax, add a reference to System.Web.Routing• Add routes via RouteTable.Routes.MapPageRoute()• Update links to use routes

– RouteUrl– GetVirtualPath

• Get Routing Data– RouteValue– RouteData.Values[]

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DEMO – Routes in ASP.NET WebForms

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Agenda• What Is Routing?• Out of the Box ASP.NET MVC Routing• Customizing ASP.NET MVC Routing• Unit Testing ASP.NET MVC Routes• Routing In ASP.NET WebForms• Helpful Links

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Helpful LinksTHE MOST IMPORTANT LINK I COULD EVER TELL YOU:http://aspnetwebstack.codeplex.com/

http://mvccontrib.codeplex.com/ - MVCContribhttp://msdn.microsoft.com/en-us/library/dd329551.aspx - Webforms

Google or Bing: ASP.NET Routing

Slides / Code will be available at http://www.wtfnext.com

References:http://www.15seconds.com/Issue/020417.htmhttp://msdn.microsoft.com/en-us/library/cc668201.aspxhttp://blogs.msdn.com/b/alikl/archive/2009/04/02/how-asp-net-mvc-works-for-aspiring-architects-2.aspxhttp://blog.didsburydesign.com/2010/02/how-to-allow-hyphens-in-urls-using-asp-net-mvc-2/http://stackoverflow.com/questions/1107507/asp-net-mvc-custom-route-handler-constrainthttp://haacked.com/archive/2007/12/17/testing-routes-in-asp.net-mvc.aspx

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