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[HttpPost] public ActionResult Login(string username, string password, string returnUrl) { if (username.EndsWith("@google.com") && password == "secret") { FormsAuthentication.SetAuthCookie(username, false); return Redirect(returnUrl ?? Url.Action("Index", "Home")); } else { ModelState.AddModelError("", "Incorrect username or password"); return View(); } } } } I don’t want to implement real Google logins because it means delving into the dark world of third-party authentication, which is a topic in its own right. Instead, I have created a terrible hack that will authenticate any user name that ends with @google.com as long as it is provided with the password secret. At the moment, my Google authentication controller isn’t hooked up to the application, and that’s where the authentication filter comes in. I created a new class file called GoogleAuthAttribute.cs, shown in Listing 18-15, in the Infrastructure folder. The FilterAttribute class, from which my GoogleAuth filter is derived, is the base for all filter classes. Listing 18-15. The Contents of the GoogleAuthAttribute.cs File using System; using System.Web.Mvc; using System.Web.Mvc.Filters; using System.Web.Routing; namespace Filters.Infrastructure { public class GoogleAuthAttribute : FilterAttribute, IAuthenticationFilter { public void OnAuthentication(AuthenticationContext context) { // not implemented } public void OnAuthenticationChallenge(AuthenticationChallengeContext context) { if (context.Result == null) { context.Result = new RedirectToRouteResult(new RouteValueDictionary { {"controller", "GoogleAccount"}, {"action", "Login"}, {"returnUrl", context.HttpContext.Request.RawUrl} }); } } } } My implementation of the OnAuthenticationChallenge method checks to see if the Result property of the AuthenticationChallengeContext argument has been set. This allows me to avoid challenging the user when 470
the filter is run after the action method has executed. Do not worry about that now. I explain why this is important in the Handling the Final Challenge Request section later in this chapter. What’s important for this section is that I use the OnAuthenticationChallenge method to challenge the user for credentials by redirecting their browser to my GoogleAccount controller with a RedirectToRouteResult. Authentication filters can use all of the ActionResult types that I described in Chapter 17, but the Controller convenience methods for creating them are not available, which is why I had to use a RouteValueDictionary object to specify the segment values so that a route to the challenge action method can be generated. Implementing the Authentication Check My authentication filter is ready to challenge users for their fake Google credentials, and now I can wire up the remaining behavior. The controller will call the OnAuthentication method before running any other kind of filter, providing an opportunity to perform a broad authentication check. You don’t have to implement the OnAuthentication method, but I am going to do so in order to check that I am dealing with a Google account. The OnAuthentication method is passed an AuthenticationContext object that, like the AuthenticationChallengeContext class, is derived from ControllerContext and provides access to all of the information I described in Chapter 17. The AuthenticationContext class also defines the properties shown in Table 18-5. Table 18-5. The properties defined by the AuthenticationContext class Name Description ActionDescriptor Returns an ActionDescriptor that describes the action method to which the filter has been applied Principal Returns an IPrincipal implementation that identifies the current user, if they have already been authenticated. Result Sets an ActionResult that expresses the result of the authentication check If the OnAuthentication sets a value for the Result property of the context object, then the MVC Framework will call the OnAuthenticationChallenge method. If the OnAuthenticationChallenge method doesn’t set a value for the Result property on its context object, then the one from the OnAuthentication method will be executed. I use the OnAuthentication method to create a result that reports an authentication error to the user, which can then be overridden by the OnAuthenticationChallenge method to challenge the user for credentials instead. This allows me to be sure that they see a meaningful response, even if no challenge can be issued (although I must admit that I have yet to encounter a situation where this has happened). In Listing 18-16, you can see how I have implemented the OnAuthentication method so that it checks that the request has been authenticated by using any Google credentials. Listing 18-16. Implementing the OnAuthentication Method in the GoogleAuthAttribute.cs File using System; using System.Security.Principal; using System.Web.Mvc; using System.Web.Mvc.Filters; using System.Web.Routing; namespace Filters.Infrastructure { public class GoogleAuthAttribute : FilterAttribute, IAuthenticationFilter { public void OnAuthentication(AuthenticationContext context) { IIdentity ident = context.Principal.Identity; if (!ident.IsAuthenticated || !ident.Name.EndsWith("@google.com")) { context.Result = new HttpUnauthorizedResult(); 471
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Pro ASP.NET MVC 5 Adam Freeman 2
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Dedicated to my lovely wife, Jacqui
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Contents About the Author About the
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Preparing the Example Project Defin
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Chapter 9: SportsStore: Completing
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Constraining Routes Constraining a
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Using Other Filter Features Filteri
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Creating the Ajax Form Understandin
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Index 18
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About the Technical Reviewer Fabio
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What Is Wrong with ASP.NET Web Form
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storage and querying language for s
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There are some good reasons for car
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Where Can I Get the Example Code? Y
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Figure 2-1. The Visual Studio ASP.N
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Figure 2-3. The initial file and fo
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Figure 2-6. Adding a controller to
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} } } return View(); A good way of
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Figure 2-9. The MVC Framework tryin
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Visual Studio will create a file ca
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Afternoon"; } } } return View(); I
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Figure 2-14. Adding to the view HTM
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public class HomeController : Contr
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} Will you attend? @Html.DropDown
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Figure 2-18. Setting the default st
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type without needing to qualify the
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[Required(ErrorMessage = "Please en
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Figure 2-21. The validation summary
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Tip You can drag JavaScript and CSS
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expect files to be in certain locat
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RSVP @using (Html.BeginForm()) {
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Thanks body { background-colo
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CHAPTER 3 The MVC Pattern Before I
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ASP.NET MVC doesn’t apply any con
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as thinly disguised Smart UI applic
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this case PasswordResetHelper. I do
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Web server and database. Integratio
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public class AdminControllerTests {
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The drawback of TDD is that it requ
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} } } return "Navigate to a URL to
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namespace LanguageFeatures.Controll
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} set { name = value; } } } public
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The listing demonstrates how to con
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using System.Collections; using Sys
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using System.Collections.Generic; n
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public static IEnumerable FilterByC
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Products = new List { new Product {
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... In this example, myAnonType is
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public string Index() { return "Nav
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Max Min Returns the largest or smal
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usiness while the background work i
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natural syntax, but they do not cha
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} Defining the Controller I am goin
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Note Notice that I declare the view
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Figure 5-4. Creating a new layout S
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Figure 5-5. The Effect of Applying
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Figure 5-6. Adding a view that reli
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Figure 5-9. The content in the layo
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public ActionResult DemoExpression(
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The containing element has data at
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Price@Model.Price Stock Level @sw
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} else { @ViewBag.ProductCount }
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Figure 5-13. Generating elements us
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CHAPTER 6 Essential Tools for MVC I
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LinqValueCalculator to determine th
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In the sections that follow, I expl
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just fine with MVC 5. I have used t
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namespace EssentialTools.Infrastruc
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Figure 6-2. The effect of running t
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I can configure the objects that Ni
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} } The FlexibleDiscountHelper clas
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public object GetService(Type servi
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Figure 6-4. Creating the unit test
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} } } // assert Assert.AreEqual(tot
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wrong"); wrong"); wrong"); } Assert
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} } } Testing and Fixing the Code I
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Listing 6-31. The Contents of the L
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Price = 48.95M}, new Product {Name
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To summarize the example, the Objec
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This is the same behavior used in t
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CHAPTER 7 SportsStore: A Real Appli
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e included in new projects are exce
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public class NinjectDependencyResol
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Figure 7-4. Creating the Product cl
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IProductRepository interface with t
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Figure 7-5. Adding the Views/Produc
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Figure 7-6. Viewing the basic appli
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Figure 7-8. Setting up the SportsSt
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Visual Studio will display a design
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Creating the Entity Framework Conte
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private EFDbContext context = new E
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public class ProductController : Co
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A view model is not part of the dom
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... ... Every namespac
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(ProductsListViewModel)controller.L
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Figure 7-14. Displaying page naviga
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Figure 7-15. The new URL scheme dis
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} @foreach (var p in Model.Products
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Figure 7-18. Creating a partial vie
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Summary In this chapter, I built mo
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using System.Collections.Generic; u
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Assert.AreEqual(pageInfo.TotalPages
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); "", new { controller = "Product"
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} } public string Menu() { return "
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has the effect of declaring a depen
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Figure 8-3. The category links High
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Now that I am providing information
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} ... CurrentCategory = category };
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Continue Shopping button to return
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Arrange - create a new cart Cart ta
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@Model.Name @Model.Price.ToString("
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For the AddToCart and RemoveFromCar
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and the total cost for the cart. Th
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CHAPTER 9 SportsStore: Completing t
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using System.Linq; using System.Web
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public void Adding_Product_To_Cart_
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shopping I added a new column to e
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@ViewBag.Title SPORTS STORE @
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. . . This change generates a link
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@Html.TextBoxFor(x => x.Zip, new {@
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} ViewBag.Title = "SportStore: Chec
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public string Country { get; set; }
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if (emailSettings.WriteAsFile) { sm
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} } } I created an EmailSettings ob
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ViewResult result = target.Checkout
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of the SportsStore.WebUI project an
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Thanks! Thanks for placing your ord
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Figure 10-1. Displaying the SportsS
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waking moment. My advice is to acce
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case, however, I hide the standard
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Bootstrap that the div element shou
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.Select(x => x.Category) .Distinct(
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@Html.ActionLink("Home", "List", "
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variations on the same basic theme.
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} This view uses a Razor foreach
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Figure 10-9. The effect of mobile-s
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public class AdminController : Cont
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Right-click on the Views/Admin fold
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Figure 11-3. Rendering the scaffold
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Figure 11-4. Rendering the modified
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Act Product p1 = target.Edit(1).Vie
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} } public string Category { get; s
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Figure 11-7. Displaying the editor
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Framework does know about and updat
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ActionResult result = target.Edit(p
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using System.ComponentModel.DataAnn
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Install-Package Microsoft.jQuery.Un
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Listing 11-17. Explicitly Specifyin
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Listing 11-19. Implementing Deletio
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You can see the delete feature by c
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Authentication is set
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Figure 12-1. The effect of the Auth
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namespace SportsStore.WebUI.Infrast
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the menu, set the name to Login and
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mock implementations of the IAuthPr
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Figure 12-3. Adding columns to the
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No Image } else { } @Html.Acti
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} } I have added a new parameter to
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[TestClass] public class ImageTests
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Figure 12-4. Adding an image to a p
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CHAPTER 13 Deployment The final, an
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Figure 13-2. Creating a new web sit
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Figure 13-4. The effect of creating
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); [ProductID] INT IDENTITY (1, 1)
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Figure 13-8. The Publish Web dialog
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Figure 13-10. Settings for the depl
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Figure 13-12. Previewing the deploy
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Figure 13-14. The SportsStore appli
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Figure 14-1. Selecting the project
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which packages are used by selectin
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} Or you can disable any layout for
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using System.Web.Mvc; namespace Deb
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If the debug attribute in the Web.c
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Figure 14-9. Hitting a breakpoint N
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Figure 14-11. The effect of assigni
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selecting Delete Breakpoint from th
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Figure 14-15. Enabling Edit and Con
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Figure 14-16. The effect of correct
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Figure 14-18. Selecting multiple br
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CHAPTER 15 URL Routing Before the i
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public class HomeController : Contr
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Figure 15-3. The segments in an exa
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started, which leads to the RouteCo
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namespace UrlsAndRoutes.Tests { [Te
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TestRouteMatch and TestRouteFail co
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Figure 15-5. Using default values t
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In Listing 15-12, I defined a new r
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Notice that, once again, I have pla
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Figure 15-8. Displaying the value o
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namespace UrlsAndRoutes { public cl
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... [TestMethod] public void TestIn
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Figure 15-11. The error displayed w
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"Home/{action}/{id}/{*catchall}", n
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namespace UrlsAndRoutes.Infrastruct
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Using Attribute Routing All of the
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Caution The Route attribute stops c
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} } public ActionResult List() { Vi
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... [Route("∼/Test")] ... Prefixi
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using System.Web.Routing; namespace
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Now, this may seem like a long path
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"Admin") @Html.ActionLink("This
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... Start the application again and
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ActionName The controller is: @Vi
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} For the routing in the example ap
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how outgoing URLs are generated. To
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and repeat the process. If the clas
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ActionName The controller is: @
Page 420 and 421: The MVC Framework supports organizi
Page 422 and 423: To demonstrate the way that areas i
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Page 426 and 427: You do not need to take any special
Page 428 and 429: intercept requests for disk files b
Page 430 and 431: outes.Add(new Route("SayHello", new
Page 432 and 433: http://www.amazon.com/books/pro-asp
Page 434 and 435: CHAPTER 17 Controllers and Actions
Page 436 and 437: System.Web.Routing.RequestContext o
Page 438 and 439: namespace ControllersAndActions.Con
Page 440 and 441: Retrieve posted data from Request.F
Page 442 and 443: After a controller has finished pro
Page 444 and 445: public string Url { get; set; } pub
Page 446 and 447: RedirectToRouteResult Issues an HTT
Page 448 and 449: shown in this test method. using Sy
Page 450 and 451: You can send an object to the view
Page 452 and 453: Arrange - create the controller Exa
Page 454 and 455: Listing 17-20. Redirecting to a Lit
Page 456 and 457: Act - call the action method Redire
Page 458 and 459: Listing 17-24. Sending a Specific S
Page 460 and 461: CHAPTER 18 Filters Filters inject e
Page 462 and 463: } } To create the view that will ga
Page 464 and 465: } } public ViewResult Create() { //
Page 466 and 467: } } void OnAuthorization(Authorizat
Page 468 and 469: Figure 18-2. Re-prompting for crede
Page 472 and 473: } } public void OnAuthenticationCha
Page 474 and 475: using System.Web.Mvc; using System.
Page 476 and 477: IExceptionFilter { public void OnEx
Page 478 and 479: Figure 18-3. The default exception
Page 480 and 481: } } } } filterContext.ExceptionHand
Page 482 and 483: Figure 18-6. An exception thrown wh
Page 484 and 485: Table 18-9. HandleErrorInfo Propert
Page 486 and 487: using System.Web.Mvc; using Filters
Page 488 and 489: ", } } } } string.Format("Action me
Page 490 and 491: execute the result. You can see how
Page 492 and 493: Figure 18-10. The effect of adding
Page 494 and 495: up manually with the Empty template
Page 496 and 497: I have already explained that filte
Page 498 and 499: Figure 18-14. Specifying the order
Page 500 and 501: Figure 18-15. The default filter be
Page 502 and 503: CHAPTER 19 Controller Extensibility
Page 504 and 505: } } } public ViewResult List() { re
Page 506 and 507: } public GetControllerSessionBehavi
Page 508 and 509: My implementations of the GetContro
Page 510 and 511: RouteConfig.RegisterRoutes(RouteTab
Page 512 and 513: } } You can see the effect of the c
Page 514 and 515: There are no action methods in this
Page 516 and 517: Figure 19-6. Using the method name
Page 518 and 519: [ActionName("Enumerate")] public Vi
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} } } }); I have used the ActionNam
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If you start the application and na
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Message: @Session["Message"] ... Th
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Data: @Model When you run the ap
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namespace ControllerExtensibility.C
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string viewName, string masterName,
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ModelState Returns information abou
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view) { } } public void ReleaseView
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Figure 20-2. Requesting an unsuppor
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Listing 20-10. The Contents of the
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Table 20-4. Razor View Engine Searc
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Figure 20-5. The effect of custom l
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Tip My custom view engine locations
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You can check to see if a view has
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I am going to start by creating a p
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@foreach (string str in Model) { @s
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"Pear"}) @Html.Action("Time") You c
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} In the Index action method, I pas
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Here is the message: @Model Inli
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Table 21-3. Useful Properties Defin
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troublesome string to the view as t
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Figure 21-3. Comparing how data val
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Figure 21-5. The effect of selectiv
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@model HelperMethods.Models.Person
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Note Using the helper methods to g
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Layout = "/Views/Shared/_Layout.csh
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} This produces the following form
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... Generating the Input Element fr
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} CreatePerson @using(Html.BeginRou
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CreatePerson label { display: i
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} public class Address { public str
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@{ ViewBag.Title = "CreatePerson";
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Notice that the elements for the Pe
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} return View((object)message); } }
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01/01/0001 00:00:00 Although the
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.editor-field input { height: 20px;
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The value of the property (0 in thi
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[Display(Name = "Birth Date")] publ
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Url Displays the data as a URL (usi
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} public string LastName { get; set
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Figure 22-10. Displaying a complex
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Views/Shared/EditorTemplates folder
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CHAPTER 23 URL and Ajax Helper Meth
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.editor-label { clear: left; } .edi
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action="GetPeople"}) This view co
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Figure 23-2. A simple synchronous f
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I am now ready to start applying un
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as shown in Listing 23-10. Listing
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Setting Ajax Options I can fine-tun
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ViewBag.Title = "GetPeople"; Layout
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Figure 23-6. Prompting the user bef
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I can address this using the AjaxOp
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ole}), } }) Url = Url.Action("Get
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Since I want to present the same da
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Figure 23-9. Working with JSON data
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using System; using System.Collecti
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@foreach (string role in Enum.GetNa
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public class Address { public strin
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Figure 24-1. A simple demonstration
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for the id parameter as follows: 1.
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Figure 24-4. The effect of using a
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This view renders a simple set of l
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Role:@Html.DisplayFor(m => m.Role)
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} Submit You can see the problem if
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using System.Web.Mvc; using MvcMode
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Listing 24-24. Using a Collection A
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... When the form is submitted, th
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Each of the classes listed in Table
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} } } if (ContainsPrefix(key)) { re
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Figure 24-10. The effect of the cus
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using System.Web; using System.Web.
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CHAPTER 25 Model Validation In the
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@ViewBag.Title .field-validati
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Listing 25-7. Explicitly Validating
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Figure 25-2. Errors result in highl
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... Please enter your name Please
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Figure 25-4. Displaying validation
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Figure 25-6. A validation message f
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RegularExpression Required [Require
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Figure 25-8. The error message from
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} } [MustBeTrue(ErrorMessage="You m
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name")); } if (DateTime.Now > Date)
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Both of these settings must be true
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The feedback is also immediate when
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} public JsonResult ValidateDate(st
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has provided is consistent with the
Page 692 and 693:
namespace ClientFeatures.Models { p
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} function processResponse(appt) {
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Figure 26-2. Disabling the browser
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undles.Add(new StyleBundle("∼/Con
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... You won’t need to do this i
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Figure 26-4. Profiling with bundles
Page 704 and 705:
CHAPTER 27 Web API and Single-page
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ReservationRepository.cs to the Mod
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} return RedirectToAction("Index");
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The view model for the partial vie
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elated actions, and makes creating
Page 714 and 715:
This time, the Web API controller h
Page 716 and 717:
using System.Collections.Generic; u
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}; function sendAjaxRequest(httpMet
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Underpinning the Ajax functions is
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Figure 27-3. Monitoring the connect
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... function removeItem(item) { sen
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Client Name Location Save }
Page 728 and 729:
Simplify the Home Controller The Ho
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Remove Create Create Rese
Page 732 and 733:
Index A Account Controller contents
Page 734 and 735:
BeginForm and BeginRoute Form metho
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Custom dependency resolver contents
Page 738 and 739:
table data script button SQL statem
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uilt-In form (see Built-in form hel
Page 742 and 743:
Razor expression shared View Start
Page 744 and 745:
PartyInvites routing system Solutio
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O OnActionExecuted method action fi
Page 748 and 749:
accessing ways context objects acti
Page 750 and 751:
summary, cart definition cart and c
Page 752 and 753:
whole-model templated helpers Test-
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