authorize.net error code 128 Action method that uses the LogoutActionResult in VS .NET

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Listing 9.5 Action method that uses the LogoutActionResult
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public ActionResult Logout() { var redirect = RedirectToAction("Index", "Home"); return new LogoutActionResult(redirect); }
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The testable Logout action method
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Listing 9.5 shows that the Logout action method returns the new LogoutActionResult method. The constructor parameter to the LogoutActionResult is a RedirectToAction result that will redirect the browser to the Index action on the HomeController.
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The advanced controller extensibility points shown in this chapter allow you to tweak the framework easily. The IController interface provides the most control, but the various controller base classes offer some useful but flexible capabilities. Actions help you easily break down basic functions of a single controller, and action filters provide hooks for inserting code before or after action execution. Action selectors help you supply hints to the action invoker about which action should be selected for execution, and action results help encapsulate repetitive rendering logic. The examples demonstrated in this chapter will help you get the most from your controllers and allow cross-cutting concerns to be easily applied throughout your application and reduce code duplication. Both of these should enable better application maintenance. Now that we ve seen some advanced controller extensibility seams, the next chapter will walk you through advanced view techniques.
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Advanced view techniques
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This chapter covers
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Using master pages to craft site-wide templates Applying partials for shared snippets of content Leveraging child actions for common widgets Building parameter lists for generating URLs Examining the Spark view engine
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The MVC pattern gives us separation of concerns between the model, controller, and view, but this pattern didn t eliminate the need for developers to carefully design their views. With the elimination of code-behind and the addition of a view model object, we can focus strictly on rendering content inside our view. But without careful attention, our views can still slide into a morass of duplication and spaghetti code. We can no longer lean on custom controls to encapsulate view behavior as we did in Web Forms. Instead, ASP.NET MVC provides similar and expanded mechanisms for tackling all levels of duplication in our views. First, we ll look at the various forms of duplication we encounter in our views and explore various means of tackling duplication as it arises.
Eliminating duplication in the view
10.1 Eliminating duplication in the view
In ASP.NET MVC, the ability to use web controls to encapsulate complex UI elements is all but gone. We can use web controls that don t take advantage of ViewState, but that renders web controls built for Web Forms mostly useless. Instead, we have to turn to other means to eliminate duplication in our views. With the release of ASP.NET MVC 2, our choices for tackling view duplication are expanded:
Master pages Partials Child actions Templates HtmlHelper extensions
Each of these means of addressing duplication in our views has its sweet spot, and there s some overlap between some of them. In chapter 3, we examined using the new templates feature to standardize the display and editing of data across our entire application. Templates work well for rendering one editor or display template for a single model member or type, but they tend to break down in other scenarios. Partials work well with common snippets, but they don t scale out to entire sites. In our first example, we ll look at establishing site-wide templates with master pages.
10.1.1 Master pages
When using the WebFormViewEngine, we retain the ability to use master pages as part of our views. Originally added as part of ASP.NET 2.0, master pages allowed developers to create master layouts for common pages. A master page defines a layout, leaving placeholders for derived pages or other master pages to fill in the blanks. In listing 10.1, the master page defines placeholders for both a page title and main content.
Listing 10.1 A master page defined for an MVC view
<%@ Master Language="C#" Inherits="System.Web.Mvc.ViewMasterPage" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title> <asp:ContentPlaceHolder ID="TitleContent" runat="server" /> </title> <link href="../../Content/Site.css" rel="stylesheet" type="text/css" /> </head> <body> <div class="page"> <div id="header"> <div id="title"> <h1>My MVC Application</h1>
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