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Usability is also an important design goal For a software product to be usable, its users, with high probability, should be able to accomplish tasks that the software is meant to assist them in carrying out The way to achieve usable software is not to build a software product first, and then bring in an interaction designer or usability engineer to recommend tweaks to the user interface Instead, to design usable software products, interaction designers and usability engineers should be brought in at the start of the project to architect the information and task flow to be intuitive to the user There are a few items to keep in mind regarding the interaction between usability and security: Do not rely on documentation The first item to keep in mind is that users generally will not read the documentation or user manual.

This example is complete (and probably representative of many examples you d find online), but it demonstrates some real problems that shouldn t be present in a real application. This book is about practical ASP.NET MVC development practices that we would recommend. Let s take the remainder of this chapter to clean up some of these shortcomings.

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On the Index view, we have a hand-written form tag. This in itself isn t bad, but we hard-coded the URL. Using different routing rules, our URLs could easily change, and that would cause this form to break. Instead, let s leverage the framework to build our form tag for us. We can use Html.BeginForm to generate a form tag like this:

GDK_KEY_PRESS or GDK_KEY_RELEASE The window that received the event TRUE if the event used XSendEvent The length of the event in milliseconds The state of Control, Shift, and Alt The key that was pressed <gdk/gdkkeysyms.h> The length of string A string approximating the entered text Raw code of the key that was pressed or released The keyboard group Whether hardware_keycode was mapped (since 2.10)

If you build security features into the software product and turn them off by default, you can be relatively sure that they will not be turned on, even if you tell users how and why to do so in the documentation Secure by default Unlike many other product features that should be turned off by default, security features should be turned on by default, or else they will rarely be enabled at all The challenge here is to design security features that are easy enough to use that they provide security advantages, and are not inconvenient to the point that users will shut them off or work around them in some way For instance, requiring a user to choose a relatively strong but usable password when they first power up a computer, and enter it at the time of each login might be reasonable.

Html.BeginForm is a special HTML helper. It doesn t directly return a string (where we d have to use <%=). Instead, it uses the Disposable pattern to gracefully wrap the form s contents in a <form> </form> set of tags. The first argument is the name of the action. You re free to use the alternative <% Html.BeginForm(); %> without the curly braces, but you ll have to write </form> yourself. We can simplify this further by making the action name the same as the action that was rendered (Index). In this case, we can omit the argument to BeginForm. Listing 1.8 contains this change.

There are many useful properties in the GdkEventKey structure that we will use throughout the book. At some point it would be useful for you to browse some of the GdkEvent structures in the API documentation. We will cover a few of the most important structures in this book, including GdkEventKey and GdkEventButton. The only variable that is available in all of the event structures is the event type, which defines the type of event that has occurred. It is a good idea to always check the event type to avoid handling it in the wrong way.

public class ProfileController : Controller { public ActionResult My() { var profile = ControllerContext .HttpContext.Profile; return View(profile); } }