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1. ASP.NET MVC CRUSH COURSEERDEM ERGİN

2. MVC Pattern – What is it?MVC - Acronym for Model/View/ControllerInvented by TrygveReenskaug[1973 - 1978]Originally used as an architectural pattern for GUIs.The first implementation of MVC was as part of Smalltalk-80 class library.

3. MVC Pattern – How does it work?The Controller asks the Model for dataThe request hits the controllerModel213ControllerUserThe Model gives the data back to the ControllerThe controller formats the data and passes them to the ViewView45The view renders the HTML that needs to be sent to the client3

4. MVC Pattern – Who uses it?.NET has Spring.NET, MonoRailJava has Swing, Struts, Grails and othersPerl has Catalyst, Gantry, Jifty and othersPHP has Zend, Zoop, Agavi and othersPython has Django, Gluon, Pylon and othersRuby has Ruby on RailsApple has cocoa and cocoa touch for objective-c [Mac, iPhone]

5. MVC FrameworkHistoryBased on Python1970S….2003 RoR{ ASP.NET MVC }2009.3 MVC1 2010.4 MVC2

6. ASP.NET MVCIt’s not a replacement for asp.net webforms, it’s a new option [flavor]

7. No more “postbacks” and “ViewStates”

8. Built on top of ASP.NETAdvantagesClean URLs and HTML

9. More control over your html and JavaScript

10. Friendly URLS

11. More easily Testable Framework.

12. All ASP.Net providers still work [Membership, Session, Caching, etc]

13. Extensible and Pluggable [Support replacing any component]ASP.NET MVC Framework StructureASP.NET Abstractions(System.Web.Abstractions.dll)ASP.NET Routing(System.Web.Routing.dll)ASP.NET MVC(System.Web.Mvc.dll)

14. ASP.NET MVC Execution Process

15. DEMOCreate New ASP.NET MVC ProjectInvestigate ASP.NET MVC Structure

16. RoutingMVC+RR => the hidden character

17. ASP.NET MVC RoutingURL PatternsSetting Default Values for URL ParametersAdding Constraints to RoutesScenarios When Routing Is Not AppliedHow URLs Are Matched to RoutesAccessing URL Parameters in a Routed PageASP.NET Routing and SecurityASP.NET Routing versus URL Rewriting

18. Model [M]Validation

19. Controller [C]Controlling the flow of application execution

20. ASP.NET MVC ControllerController is a class consisting of a set of action methods. Responsible for Handling user interactionWorking with the modelsSelecting a view to renderSending model and information to a particular viewMaking decisions for security, UI, redirects ... etc.The ASP.Net MVC requires the names of all controllers to end with the suffix "Controller“ e.g. HomeController, LoginController

21. ASP.NET MVC ControllerA controller action always returns an ActionResultWhat if I return an object ??Action return ActionResult which can beViewResult => HTML and markup.

22. EmptyResult=> no result.

23. RedirectResult => redirection to a new URL.

24. JsonResult => json result that can be used in an AJAX application.

25. JavaScriptResult => JavaScript script.

26. ContentResult => text result [and wraps any non ActionResult return Type].

27. FileContentResult => downloadable file [with the binary content].

28. FilePathResult => downloadable file [with a path].

29. FileStreamResult => a downloadable file [with a file stream]. Note: all public methods of a controller class consideredas action methods, if you don’t want a public method to be an action, mark it with [NonAction()] attribute

30. ASP.NET MVC Controller Filter

31. View [V]

32. ASP.NET MVC ViewResponsible for presentation, look & feel, formatting, sorting … etc. Interacts with model but shouldn’t make decisions No logic should go thereCode Behind exists but not recommendedNo View State, No Server ControlsHTML HelpersTakes the view data from the controllerCan be strong typed Can be extended by implementing View EnginesAlways build your views !!!

33. An HTML Helper is just a method that returns a string.• Html.ActionLink()• Html.BeginForm()• Html.CheckBox()• Html.DropDownList()• Html.EndForm()• Html.Hidden()• Html.ListBox()• Html.Password()• Html.RadioButton()• Html.TextArea()• Html.TextBox()e.g.ASP.NET MVC View

34. Extensibility

35. The default ASP.NET MVC Pipeline21

36. The default componentsURL Routing:Parses the URL, andinstantiate the MvcHandlerController FactoryTakes URL parameters, create controller via reflectionbased on ControllernameAction InvokerInvokes the actionbased on thename, with the filtersbefore and afterViewEngineWebFormsviewengineTemplateRenders a TextBoxalmostforeverythingHtmlHelperHas a bunch of standardmethods

37. RoutingextensibilityRouteConstraintValidatesrouteparameterswith codeRouteHandlerDefineshow the requestmustbehandled

38. Controller ExtensibilityControllerFactoryResponsibleforcreatingControllersActionInvokerInvokesanaction, basedonly on itsnameActionMethodSelectorAttributeHelps the actioninvoker decide whichactiontoinvokewhen the nameisnotuniqueControllerThe base classforevery controllerActionResultDecideshowtosend the output to the user

39. ActionFilterExtensibilityAuthorizationFilterMakessure the currentrequestisallowedActionFiltersExecutedbefore or after the actionexecutesResultFiltersExecutedbefore or afteranactionresultexecutes

40. Binding/ValidationExtensibilityModelBinderPopulates the actionmethodparametersfrom the requestModelValidator ProviderRetrieves the validationrulesServer-sideValidationRulesThe actual server-side validationrule

41. ViewExtensibilityViewEngineThe service thattransforms in HTML the data for the userHtmlHelpersUtility functionsthathideaway the generation of some HTML markup or JavaScript codeClient-sideValidationRulesClient-sidevalidationrulesModelMetadata ProviderRetrieves the metadataneededfor the templatedhelpersCustom TemplatesRenders the html toedit/display specifictypes

42. The Mostimportantextensibilitypoints

43. Custom T4 TemplatesWHAT: Generates View and Controller files DEFAULT: <vsdir>Common7\IDE\ItemTemplates\CSharp\Web\MVC 2\CodeTemplatesWHY: Add your own to generate Views and Controllers based on your needsCopyCodeTemplates folder in you solutionDemo

44. CustomTemplatesWHAT: Renders the html toedit/display specifictypesDEFAULT: Everythingis a label or a textboxWHY: Add your own to customize specific data-typesAdd PartialViews in:/Views/Shared/DisplayTemplates/Views/Shared/EditorTemplatesDemo

45. Server-sideValidationRulesWHAT: Definehow a propertyisvalidated in the server side validationDEFAULT: Required, Length, wrong typeWHY: Add your own rulesWrite a new ValidationAttributeImplement the IsValid methodApply attribute to your modelDemo

46. Client-sideValidationRulesWHAT: Definehow a propertyisvalidated in the client-side validationDEFAULT: Client-sidecounterparts of the default server-side validatorsWHY: Addyourownvalidators

47. Client-sideValidationRulesFirst make a server-side validatorMakevalidationlogic in JavaScriptWriteadaptertopushvalidationrulesto client-sideRegistervalidationfunction via JSRegisteradapter in Global.asaxDemo

48. Base ControllerWHAT: The base class for every ControllerDEFAULT: Default implementation of helper methodsWHY: Extend if you want to enforce you own conventionsOverride ControllerYourcontrollersoverridefromBaseControllerinsteadof ControllerDemo

49. HtmlHelpersWHAT: Utility functions that hide away the generation of HTML markup or JavaScript codeDEFAULT: Html.TextBox, Html.Encode, Html.Partial, …WHY: “If there is an if, write an Helper”Add new methods as extension methodsDemo

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