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as shown in Listing 23-10. Listing 23-10. Creating an Unobtrusive Ajax Form in the GetPeople.cshtml File @using HelperMethods.Models @model string @{ ViewBag.Title = "GetPeople"; Layout = "/Views/Shared/_Layout.cshtml"; AjaxOptions ajaxOpts = new AjaxOptions { UpdateTargetId = "tableBody" }; } Get People FirstLastRole @Html.Action("GetPeopleData", new {selectedRole = Model }) @using (Ajax.BeginForm("GetPeopleData", ajaxOpts)) { @Html.DropDownList("selectedRole", new SelectList( new [] {"All"}.Concat(Enum.GetNames(typeof(Role))))) Submit } At the heart of the MVC Framework support for Ajax forms is the Ajax.BeginForm helper method, which takes an AjaxOptions object as its argument. I like to create the AjaxOptions objects at the start of the view in a Razor code block, but you can create them inline when you call Ajax.BeginForm if you prefer. The AjaxOptions class, which is in the System.Web.Mvc.Ajax namespace, defines properties that let me configure how the asynchronous request to the server is made and what happens to the data that comes back. These properties are described in Table 23-3. Table 23-3. AjaxOptions Properties Property Confirm Description Sets a message to be displayed to the user in a confirmation window before making the Ajax request HttpMethod Sets the HTTP method that will be used to make the request—must be either Get or Post InsertionMode LoadingElementId Specifies the way in which the content retrieved from the server is inserted into the HTML. The three choices are expressed as values from the InsertionMode enum: InsertAfter, InsertBefore and Replace (which is the default). Specifies the ID of an HTML element that will be displayed while the Ajax request is being performed LoadingElementDuration Specifies the duration of the animation used to reveal the element specified by UpdateTargetId Url LoadingElementId Sets the ID of the HTML element into which the content retrieved from the server will be inserted Sets the URL that will be requested from the server In the listing, I have set the UpdateTargetId property to tableBody. This is the id I assigned to the tbody HTML element in the view in Listing 23-10. When the user clicks the Submit button, an asynchronous request will be made to the GetPeopleData action method and the HTML fragment that is returned is used to replace the existing elements in the tbody. 614
Tip The AjaxOptions class also defines properties that specify callbacks for different stages in the request life cycle. See the “Working with Ajax Callbacks” section later in this chapter for details. That’s all there is to it: I replace the Html.BeginForm method with Ajax.BeginForm and ensure that I have a target for the new content. Everything else happens automatically and the result is an asynchronous form. It can be hard to detect when you are testing with the browser and the server on the same machine, but you can tell that the browser is making Ajax requests for fragments of HTML by using the browser F12 tools. These tools allow you to monitor the network requests that the browser makes and in Figure 23-3, you can see the Internet Explorer tools showing a call to the GetPeopleData action method. Figure 23-3. Confirming that Ajax requests are being made Understanding How Unobtrusive Ajax Works When I call the Ajax.BeginForm helper method, the options that I specify using the AjaxOptions object are transformed into attributes applied to the form element. The view in Listing 23-10 produces the following form element: ... ... When the HTML page rendered from the GetPeople.cshtml view is loaded by the browser, the JavaScript in the jquery.unobtrusive-ajax.js library scans the HTML elements and identifies the Ajax form by looking for elements that have a data-ajax attribute with a value of true. The other attributes whose names start with data-ajax contain the values I specified using the AjaxOptions class. These configuration options are used to configure jQuery, which has built-in support for managing Ajax requests. Tip You don’t have to use the MVC Framework support for unobtrusive Ajax. There are plenty of alternatives available, including using jQuery directly. That said, pick a technique and stick to it. I recommend against mixing the MVC Framework unobtrusive Ajax support with other techniques and libraries in the same view, as there can be some unfortunate interactions, such as duplicated or dropped Ajax requests. 615
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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
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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
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 600 and 601: Figure 22-10. Displaying a complex
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 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
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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
Page 650 and 651: Listing 24-24. Using a Collection A
Page 652 and 653: ... When the form is submitted, th
Page 654 and 655: Each of the classes listed in Table
Page 656 and 657: } } } if (ContainsPrefix(key)) { re
Page 658 and 659: Figure 24-10. The effect of the cus
Page 660 and 661: using System.Web; using System.Web.
Page 662 and 663: 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
Page 672 and 673:
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
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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
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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
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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
Page 730 and 731:
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
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summary, cart definition cart and c
Page 752 and 753:
whole-model templated helpers Test-
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