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Listing 20-10. The Contents of the Index.cshtml File @model string[] @{ } ViewBag.Title = "Index"; This is a list of fruit names: @foreach (string name in Model) { @name } Understanding Razor View Rendering The Razor View Engine compiles the views in your applications to improve performance. The views are translated into C# classes, and then compiled, which is why you are able to include C# code fragments so easily. It is instructive to look at the source code that Razor views generate, because it helps to put many of the Razor features in context. The views in an MVC application are not compiled until the application is started, so to see the classes that are created by Razor, you need to start the application and navigate to the /Home/Index action. The initial request to MVC application triggers the compilation process for all views. You can see the output from the request in Figure 20-4. Figure 20-4. The output from the Index action method on the Home controller Conveniently, classes generated from the view files are written to the disk as C# code files and then compiled, which means that you can see the C# statements that represent a view. You can find the generated files in c:\Users\< yourLoginName> \AppData\Local\Temp\Temporary ASP.NET Files on Windows 7 and Windows 8. Finding the code file generated for a particular view requires a bit of poking around. There are usually a number of folders with cryptic names, and the names of the .cs files do not correspond to the names of the classes they contain. As an example, I found the generated class for the view in Listing 20-10 in a file called App_Web_ihpp0d0l.0.cs in the root\7bbfc2bc\bd7485cd folder. I have tidied up the class from my system to make it easier to read, as shown in Listing 20-11. Listing 20-11. The Generated C# Class for a Razor View namespace ASP { using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Web; using System.Web.Helpers; using System.Web.Security; using System.Web.UI; using System.Web.WebPages; using System.Web.Mvc; 538
using System.Web.Mvc.Ajax; using System.Web.Mvc.Html; using System.Web.Optimization; using System.Web.Routing; public class _Page_Views_Home_Index_cshtml : System.Web.Mvc.WebViewPage { public _Page_Views_Home_Index_cshtml() { } public override void Execute() { ViewBag.Title = "Index"; WriteLiteral("\r\n\r\nThis is a list of fruit names:\r\n\r\n"); } } } foreach (string name in Model) { WriteLiteral(" "); Write(name); WriteLiteral("\r\n"); } First, note that the class is derived from WebViewPage, where T is the model type: WebViewPage for this example. This is how strongly typed views are handled. Also notice the name of the class that has been generated: _Page_Views_Home_Index_cshtml. You can see how the path of the view file has been encoded in the class name. This is how Razor maps requests for views into instances of compiled classes. In the Execute method, you can see how the statements and elements in the view have been handled. The code fragments that I prefixed with the @ symbol are expressed directly as C# statements. The HTML elements are handled with the WriteLiteral method, which writes the contents of the parameter to the result as they are given. This is opposed to the Write method, which is used for C# variables and encodes the string values to make them safe for use in an HTML page. Both the Write and WriteLiteral methods write content to a TextWriter object. This is the same object that is passed to the IView.Render method, which you saw at the start of the chapter. The goal of a compiled Razor view is to generate the static and dynamic content and send it to the client via the TextWriter. This is useful to keep in mind when I turn to HTML helper methods later in later chapters. Configuring the View Search Locations The Razor View Engine follows a standard convention when looking for a view. For example, if you request the Index view associated with the Home controller, Razor looks through this list of views: ∼/Views/Home/Index.cshtml ∼/Views/Home/Index.vbhtml ∼/Views/Shared/Index.cshtml ∼/Views/Shared/Index.vbhtml As you now know, Razor is not really looking for the view files on disk, because they have already been compiled into C# classes. Razor looks for the compiled class that represents these views. The .cshtml files are templates containing C# statements (the kind I am using), and the .vbhtml files contain Visual Basic statements. You can change the view files that Razor searches for by creating a subclass of RazorViewEngine. This class is the Razor IViewEngine implementation. It builds on a series of base classes that define a set of properties that determine which view files are searched for. These properties are described in Table 20-4. 539
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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: @
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The MVC Framework supports organizi
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To demonstrate the way that areas i
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able to request /Admin/Home/Index a
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You do not need to take any special
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intercept requests for disk files b
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outes.Add(new Route("SayHello", new
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http://www.amazon.com/books/pro-asp
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CHAPTER 17 Controllers and Actions
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System.Web.Routing.RequestContext o
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namespace ControllersAndActions.Con
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Retrieve posted data from Request.F
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After a controller has finished pro
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public string Url { get; set; } pub
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RedirectToRouteResult Issues an HTT
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shown in this test method. using Sy
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You can send an object to the view
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Arrange - create the controller Exa
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Listing 17-20. Redirecting to a Lit
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Act - call the action method Redire
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Listing 17-24. Sending a Specific S
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CHAPTER 18 Filters Filters inject e
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} } To create the view that will ga
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} } public ViewResult Create() { //
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} } void OnAuthorization(Authorizat
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Figure 18-2. Re-prompting for crede
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[HttpPost] public ActionResult Logi
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} } public void OnAuthenticationCha
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using System.Web.Mvc; using System.
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IExceptionFilter { public void OnEx
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Figure 18-3. The default exception
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} } } } filterContext.ExceptionHand
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Figure 18-6. An exception thrown wh
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Table 18-9. HandleErrorInfo Propert
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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
Page 520 and 521: } } } }); I have used the ActionNam
Page 522 and 523: If you start the application and na
Page 524 and 525: Message: @Session["Message"] ... Th
Page 526 and 527: Data: @Model When you run the ap
Page 528 and 529: namespace ControllerExtensibility.C
Page 530 and 531: string viewName, string masterName,
Page 532 and 533: ModelState Returns information abou
Page 534 and 535: view) { } } public void ReleaseView
Page 536 and 537: Figure 20-2. Requesting an unsuppor
Page 540 and 541: Table 20-4. Razor View Engine Searc
Page 542 and 543: Figure 20-5. The effect of custom l
Page 544 and 545: Tip My custom view engine locations
Page 546 and 547: You can check to see if a view has
Page 548 and 549: I am going to start by creating a p
Page 550 and 551: @foreach (string str in Model) { @s
Page 552 and 553: "Pear"}) @Html.Action("Time") You c
Page 554 and 555: } In the Index action method, I pas
Page 556 and 557: Here is the message: @Model Inli
Page 558 and 559: Table 21-3. Useful Properties Defin
Page 560 and 561: troublesome string to the view as t
Page 562 and 563: Figure 21-3. Comparing how data val
Page 564 and 565: Figure 21-5. The effect of selectiv
Page 566 and 567: @model HelperMethods.Models.Person
Page 568 and 569: Note Using the helper methods to g
Page 570 and 571: Layout = "/Views/Shared/_Layout.csh
Page 572 and 573: } This produces the following form
Page 574 and 575: ... Generating the Input Element fr
Page 576 and 577: } CreatePerson @using(Html.BeginRou
Page 578 and 579: CreatePerson label { display: i
Page 580 and 581: } public class Address { public str
Page 582 and 583: @{ ViewBag.Title = "CreatePerson";
Page 584 and 585: Notice that the elements for the Pe
Page 586 and 587: } 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
Page 656 and 657:
} } } 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
Page 694 and 695:
} 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
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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
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Index A Account Controller contents
Page 734 and 735:
BeginForm and BeginRoute Form metho
Page 736 and 737:
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
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summary, cart definition cart and c
Page 752 and 753:
whole-model templated helpers Test-
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