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Since I want to present the same data in two different formats (HTML and JSON), I have refactored the controller so that there is a common (and private) GetData method that is responsible for performing the filtering. I have added a new action method called GetPeopleDataJson, which returns a JsonResult object. This is a special kind of ActionResult that tells the view engine that I want to return JSON data to the client, rather than HTML. (You can learn more about the ActionResult class and the role it plays in the MVC Framework in Chapter 17.) I create a JsonResult by calling the Json method in the action method, passing in the data that I want converted to the JSON format, like this: ... return Json(data, JsonRequestBehavior.AllowGet); ... In this case, I have also passed in the AllowGet value from the JsonRequestBehavior enumeration. By default, JSON data will only be sent in response to POST requests, but by passing this value as a parameter to the Json method, I tell the MVC Framework to respond to GET requests as well. Caution You should only use JsonRequestBehavior.AllowGet if the data you are returning is not private. Due to a security issue in many Web browsers, it’s possible for third-party sites to intercept JSON data that you return in response to a GET request, which is why JsonResult will not respond to GET requests by default. In most cases, you will be able to use POST requests to retrieve the JSON data instead, avoiding the problem. For more information, see http://haacked.com/archive/2009/06/25/json-hijacking.aspx. Processing JSON in the Browser To process the JSON I retrieve from the MVC Framework application server, I specify a JavaScript function using the OnSuccess callback property in the AjaxOptions class. In Listing 23-18, you can see how I have updated the GetPeople.cshtml view file to remove the handler functions I defined in the last section and use the OnSuccess callback to process the JSON data. Listing 23-18. Working with JSON Data in the GetPeople.cshtml File @using HelperMethods.Models @model string @{ ViewBag.Title = "GetPeople"; Layout = "/Views/Shared/_Layout.cshtml"; AjaxOptions ajaxOpts = new AjaxOptions { UpdateTargetId = "tableBody", Url = Url.Action("GetPeopleData"), LoadingElementId = "loading", LoadingElementDuration = 1000, Confirm = "Do you wish to request new data?" }; } function processData(data) { var target = $("#tableBody"); target.empty(); for (var i = 0; i < data.length; i++) { var person = data[i]; target.append("" + person.FirstName + "" + person.LastName + "" + person.Role + " "); } 626
} Get People Loading Data... FirstLastRole @Html.Action("GetPeopleData", new {selectedRole = Model }) @using (Ajax.BeginForm(ajaxOpts)) { @Html.DropDownList("selectedRole", new SelectList( new [] {"All"}.Concat(Enum.GetNames(typeof(Role))))) Submit } @foreach (string role in Enum.GetNames(typeof(Role))) { @Ajax.ActionLink(role, "GetPeople", new {selectedRole = role}, new AjaxOptions { Url = Url.Action("GetPeopleDataJson", new {selectedRole = role}), OnSuccess = "processData" }) } I have defined a new function called processData, which contains some basic jQuery code that processes the JSON objects and uses them to create the tr and td elements needed to populate the table. Tip I don’t go into jQuery in this book because it is a topic in and of itself. I love jQuery, though, and if you want to learn more about it, then I have written Pro jQuery 2.0 (Apress, 2013). Notice that I have removed the value for the UpdateTargetId property from the AjaxOptions objects I created for the links. If you forget to do this, the unobtrusive Ajax feature will try and treat the JSON data it retrieves from the server as HTML. You can usually tell this is happening because the contents of the target element will be removed but not replaced with any new data. You can see the result of the switch to JSON by starting the application, navigating to the /People/GetPeople URL, and clicking one of the links. As Figure 23-9 shows, I don’t get quite the right result. In particular, the information displayed in the Role column of the table isn’t correct. I will explain why this happens and show you how to make it right in the next section. 627
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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
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Figure 21-5. The effect of selectiv
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@model HelperMethods.Models.Person
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Note Using the helper methods to g
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Layout = "/Views/Shared/_Layout.csh
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} This produces the following form
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... Generating the Input Element fr
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 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 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
Page 664 and 665: @ViewBag.Title .field-validati
Page 666 and 667: Listing 25-7. Explicitly Validating
Page 668 and 669: Figure 25-2. Errors result in highl
Page 670 and 671: ... Please enter your name Please
Page 672 and 673: Figure 25-4. Displaying validation
Page 674 and 675: 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
Page 704 and 705:
CHAPTER 27 Web API and Single-page
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ReservationRepository.cs to the Mod
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} return RedirectToAction("Index");
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The view model for the partial vie
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elated actions, and makes creating
Page 714 and 715:
This time, the Web API controller h
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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
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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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