ASP.NET PDF Viewer using C#, VB/NET

The story template includes three sections, or acts, that form a classical story structure and correspond to the beginning, middle, and end of your presentation. Each act in the template is delineated by a horizontal black bar extending across the page, as shown in Figure 3-3. Act I begins your story by setting up all of the key story elements, including the setting, the main character, a con ict, and the desired outcome. Act II drives the story forward by picking up on the con ict in Act I and developing it through the actions and reactions of the main character in response to changing conditions. Act III ends the story by framing a climax and a decision that the main character must face to resolve the situation, revealing something about his or her character. This timetested structure keeps your audience interested in your presentation and eager to nd out what happens next.

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You use before_filter with a symbol as a parameter, where the symbol represents the count_requests_in_session method. Within the count_requests_in_session method, a hash provided by Rails called session is used. Automatically, session is always a data store associated with the current session, so anything you write to it or read from it is always associated with the current session. In this case, you initialize session[:requests] with 0 if it not already defined, and then you increase the count on the next line. You can access this information from your views now quite easily. Go to app/views/entries/view_all.rhtml and add this line to the top of the file:

If you now load http://localhost/entries/view_all (or just http://localhost/ if you followed the Routing section earlier), you ll see 1 at the top of the page. Reload the page, and the number increases for each reload. Sessions in action!

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If you totally shut down your Web browser, reload it, and do the same again, you ll notice the number has gone back to 1. This is because, by default, sessions are only stored until the Web browser is closed. You can override this if you want to, though, with some settings placed in config/environment.rb. You can learn more at http://errtheblog. com/post/24. (There is further documentation on how sessions operate independently of Rails, at a deeper level, in the CGI section of 16.)

As you can see, slicing is very useful for extracting parts of a sequence. The numbering here is very important. The first index is the number of the first element you want to include. However, the last index is the number of the first element after your slice. Consider the following: >>> >>> [4, >>> [1] numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] numbers[3:6] 5, 6] numbers[0:1]

Although you ve managed to create a basic, working Rails application so far, I ve only covered the basics. In this section I ll go into a little more depth in a few key areas that make Rails even more powerful.

This three-part story structure follows natural patterns that underlie the way we think and understand. No one needs special training or technology to understand a classical story structure because it s the way humans have been communicating with one another throughout history. Stories frame the context for communication and focus attention by making information speci c and relevant to an audience. A story structure literally ties together scattered pieces of information. A story also can help you to focus your ideas, clarify your words and images, and produce an engaging experience for both you and your audiences. By reaching into the past and incorporating these fundamental ideas in your current PowerPoint story, you ll be building on a solid foundation that ensures that your presentation is focused, clear, and engaging. There is also a research basis for using a story structure. As mentioned in 2, the long-term memory of your audience already contains existing structures that can help working memory organize and integrate new information. One of the most basic structures is the three-act structure that forms the foundation for countless stories, novels, theatrical productions, lms, and television shows. When you tap into this powerful three-part organizing structure that already exists in your audience s long-term memory and apply it to the structure of the new information you present, as shown in Figure 3-4, you are well on your way to creating a clear pathway through the limited capacity of working memory.

In the Rails application developed earlier in this chapter, you let scaffolding do the work of creating views for you. You then looked through the views created to see how they work. While doing this, you might have noticed the HTML code used was very basic. The code used was only that specifically required to render that particular page or view. There was no header or footer code, as you usually get with HTML. For example, most HTML documents would start off something like this: