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Figure 22-10. Displaying a complex property Tip The HomeAddress property is typed to return an Address object, and I can apply all of the same metadata to the Address class as I did to the Person class. The Object template is invoked explicitly when I use the EditorFor helpers on the HomeAddress property, and so all of the metadata conventions are honored. Customizing the Templated View Helper System I have shown you how to use metadata to shape the way that the templated helpers render data, but this is the MVC Framework and so there are some advanced options that completely customize the templated helpers. In the following sections, I will show you how to supplement or replace the built-in support to create specific results. Creating a Custom Editor Template One of the easiest ways of customizing the templated helpers is to create a custom template. This allows me to render exactly the HTML I want for a model property. To demonstrate how this feature works, I am going to create a custom template for the Role property in the Person class. This property is typed to be a value from the Role enumeration, but the way that this is rendered by default is problematic because the templated helpers just create a regular input element that allows the user to enter any value and not just the values defined by the enumeration. The MVC Framework looks for custom editor templates in the /Views/Shared/EditorTemplates folder, so I created this folder in the example project and then created a new strongly typed partial view called Role.cshtml within it. You can see the contents of this file in Listing 22-19. Listing 22-19. The Contents of the Role.cshtml File @model HelperMethods.Models.Role @Html.DropDownListFor(m => m, new SelectList(Enum.GetNames(Model.GetType()), Model.ToString())) The model type for this view is the Role enumeration and I use the Html.DropDownListFor helper method to create a select with option elements for the values in the enumeration. I passed an additional value to the 600
SelectList constructor, which specifies the selected value, which I obtained from the view model object. The DropDownListFor method and the SelectList object operate on string values, so I have to make sure that I cast the enumeration values and the view model value. When I use any of the templated helper methods to generate an editor for the Role type, my /Views/Shared/EditorTemplates/Role.cshtml file will be used, ensuring that I present the user with a consistent and usable representation of the data type. You can see the effect of the custom template in Figure 22-11. Figure 22-11. The effect of a custom template for the Role enumeration UNDERSTANDING THE TEMPLATE SEARCH ORDER The Role.cshtml template works because the MVC Framework looks for custom templates for a given C# type before it uses one of the built-in templates. In fact, there is a specific sequence that the MVC Framework follows to find a suitable template: 1. The template passed to the helper. For example, Html.EditorFor(m => m.SomeProperty, "MyTemplate") would lead to MyTemplate being used. 2. Any template that is specified by metadata attributes, such as UIHint 3. The template associated with any data type specified by metadata, such as the DataType attribute 4. Any template that corresponds to the.NET class name of the data type being processed 5. The built-in String template if the data type being processed is a simple type 6. Any template that corresponds to the base classes of the data type 7. If the data type implements IEnumerable, then the built-in Collection template will be used. 8. If all else fails, the Object template will be used, subject to the rule that scaffolding is not recursive. Some of these steps rely on the built-in templates, which are described in Table 22-5. At each stage in the template search process, the MVC Framework looks for a template called EditorTemplates/ for editor helper methods or DisplayTemplates/ for display helper methods. For the Role template, I satisfied step 4 in the search process; I created a template called Role.cshtml and placed it in the /Views/Shared/EditorTemplates folder. Custom templates are found using the same search pattern as regular views, which means I can create a controller-specific custom template and place it in the ∼/Views/ /EditorTemplates folder to override the templates found in the ∼/Views/Shared/EditorTemplates folder. Creating a Generic Template I am not limited to creating type-specific templates. I can, for example, create a template that works for all enumerations and then specify that this template be selected using the UIHint attribute. If you look at the template search sequence in the “Understanding the Template Search Order” sidebar, you will see that templates specified using the UIHint attribute take precedence over type-specific ones. To demonstrate how this works, I have created a new view file called Enum.cshtml in the 601
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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
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", } } } } string.Format("Action me
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execute the result. You can see how
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Figure 18-10. The effect of adding
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up manually with the Empty template
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I have already explained that filte
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Figure 18-14. Specifying the order
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Figure 18-15. The default filter be
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CHAPTER 19 Controller Extensibility
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} } } public ViewResult List() { re
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} public GetControllerSessionBehavi
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My implementations of the GetContro
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RouteConfig.RegisterRoutes(RouteTab
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} } You can see the effect of the c
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There are no action methods in this
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Figure 19-6. Using the method name
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[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
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); } }
Page 588 and 589: 01/01/0001 00:00:00 Although the
Page 590 and 591: .editor-field input { height: 20px;
Page 592 and 593: The value of the property (0 in thi
Page 594 and 595: [Display(Name = "Birth Date")] publ
Page 596 and 597: Url Displays the data as a URL (usi
Page 598 and 599: } public string LastName { get; set
Page 602 and 603: Views/Shared/EditorTemplates folder
Page 604 and 605: CHAPTER 23 URL and Ajax Helper Meth
Page 606 and 607: .editor-label { clear: left; } .edi
Page 608 and 609: action="GetPeople"}) This view co
Page 610 and 611: Figure 23-2. A simple synchronous f
Page 612 and 613: I am now ready to start applying un
Page 614 and 615: as shown in Listing 23-10. Listing
Page 616 and 617: Setting Ajax Options I can fine-tun
Page 618 and 619: ViewBag.Title = "GetPeople"; Layout
Page 620 and 621: Figure 23-6. Prompting the user bef
Page 622 and 623: I can address this using the AjaxOp
Page 624 and 625: ole}), } }) Url = Url.Action("Get
Page 626 and 627: Since I want to present the same da
Page 628 and 629: Figure 23-9. Working with JSON data
Page 630 and 631: using System; using System.Collecti
Page 632 and 633: @foreach (string role in Enum.GetNa
Page 634 and 635: public class Address { public strin
Page 636 and 637: Figure 24-1. A simple demonstration
Page 638 and 639: for the id parameter as follows: 1.
Page 640 and 641: Figure 24-4. The effect of using a
Page 642 and 643: This view renders a simple set of l
Page 644 and 645: Role:@Html.DisplayFor(m => m.Role)
Page 646 and 647: } Submit You can see the problem if
Page 648 and 649: 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)
Page 684 and 685:
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
Page 708 and 709:
} 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
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
Page 746 and 747:
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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