Microsoft ASP.NET MVC 2: The New Stuff

Stephen WaltherSenior Program ManagerMicrosoft Corporation

PDC09-FT22

ASP.NET MVC 1.0

Everything starts so simple, but then…

ASP.NET MVC 1.0

ASP.NET MVC 1.0

Enables you to build applications that can be maintained over the long term:

> Supports a clear separation of concerns

> Supports testability

> Supports “close to the metal” programming experience

What’s New in MVC 2?

> Better Separation of Concerns (Maintainability)> Html.RenderAction()> Areas

> Easier Validation (Maintainability/Productivity)> Data Annotations> Client Validation

> Helper Improvements (Maintainability/Productivity)> Strongly-Typed Helpers> Templated Helpers

ASP.NET MVC 2

Visual Studio 2010Included

Visual Studio 2008 (Service Pack 1)Download

Both versions built against .NET 3.5

RenderAction (Composability)

<% Html.RenderAction() %>

> Menus> Banner Ads> Shopping Carts

Any UI that appears in multiple pages and requires business logic

RenderAction (Maintainability)

> Html.RenderPartial()Renders UI

> Html.RenderAction()Invokes controller action that renders UI

Using RenderAction

demo

Areas (Maintainability)

AreasEnables you to maintain a clear separation of functionality in a single project

AreaRegistration.RegisterAllAreas();

Using Areas

demo

Validation (Maintainability/Productivity)

Client-Side Validation

Server-Side Validation

Model Class

Define Validation

Validation (Maintainability/Productivity)> Model Validation Providers

> Data Annotation (Default)> Enterprise Library> XML

Anything you want

Validation (Maintainability/Productivity)Data Annotation Validators

> [Required]> [Range]> [RegularExpression]> [StringLength]Custom Validator

Validation (Maintainability/Productivity)

public class Customer{ [Required] [DisplayName("First Name")] public string FirstName { get; set; }

[Required] [RegularExpression(@"\S+@\S+\.\S+")] public string Email { get; set; }}

Server-Side Validation with Data Annotations

demo

Validation (Maintainability/Productivity)Client-Side Validation

<script src="../../Scripts/MicrosoftAjax.debug.js" type="text/javascript"></script>

<script src="../../Scripts/MicrosoftMvcAjax.debug.js" type="text/javascript"></script>

<% Html.EnableClientValidation(); %>

Client-Side Validation

demo

Strongly-Typed Helpers (Maintainability)> Html.TextBoxFor()> Html.TextAreaFor()> Html.ValidationMessageFor()…

Templated Helpers (Productivity)

Display Helper Methods> Html.Display()> Html.DisplayFor()> Html.DisplayForModel()

Edit Helper Methods> Html.Editor()> Html.EditorFor()> Html.EditorForModel()

Templated Helpers (Productivity)

Specify Template:> By Type:

DateTime.ascx

> By Name:Html.DisplayForModel(“MyTemplate.ascx”);

> By UIHint[UIHint("MyPropertyTemplate")]public string Title { get; set; }

Templated Helpers (Productivity)

Fallback:> Employee> Person> Object

Templated Helpers

demo

Other New Features

> Security> HTML Encoding Syntax

> <%: Model.NewPostByEvilPerson %> > Works with ASP.NET 4> JsonResult

> Performance Improvements> Asynchronous Controller Actions

> Convenience Improvements> Default Parameters for Controller Actions> HttpPost, HttpGet, RequiresHttps

> Value Providers

Value Providers

Source for Model Binder data:

> FormValueProvider> RouteDataValueProvider> QueryStringValueProvider> HttpFileCollectionValueProvider

and custom…

Using a JsonValueProvider with ASP.NET MVC 2 and the Microsoft Ajax Library

demo

Why ASP.NET MVC 2 is Great!

> Separation of Concerns (Maintainability)> RenderAction()> Areas

> Validation (Maintainability/Productivity)> Data Annotations Support> Client Validation

> Helper Improvements (Maintainability/Productivity)> Strongly-Typed Helpers> Templated Helpers

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