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ne of Cake s selling points is its ease of installation. At this point I could add a long tutorial explaining how to install Cake for every possible server configuration, but I won t. Cake should be simple enough to install, and if you do experience trouble getting off the ground with it, chances are the problem lies in a more unduly complex server configuration. Appendix A addresses some of the choices beginners make in setting up a localhost environment in case you run into installation questions during this chapter. By and large, any troubles getting Cake to work are due to localhost issues, not enterprise server or web service provider setups. Throughout this book, you will develop some Cake applications that I expect you to build on your PC and not on a web server. All my instructions, therefore, will be for a localhost environment, not a remote one, though the setup routines I discuss in this chapter apply to a remote installation as well.

To sort rows of data in ascending order (A to Z, or 0 to 9) or descending order (Z to A, or 9 to 0) using a particular column to determine the sort order, follow these steps: 1. Click a cell in the column by which you would like to sort. 2. On the Standard toolbar, click Sort Ascending or Sort Descending.

Occurs when the application starts, which is the first time it receives a request from any user. It doesn t occur on subsequent requests. This event is commonly used to create or cache some initial information that will be reused later. Occurs when the application is shutting down, generally because the web server is being restarted. You can insert cleanup code here. Occurs with each request the application receives, just before the page code is executed. Occurs with each request the application receives, just after the page code is executed. Occurs whenever a new user request is received and a session is started. Sessions are discussed in detail in 7. Occurs when a session times out or is programmatically ended. This event is only raised if you are using in-process session state storage (the InProc mode, not the StateServer or SQLServer modes). Occurs in response to an unhandled error. You can find more information about error handling in 8.

Application_End()

Application_BeginRequest() Application_EndRequest() Session_Start() Session_End()

Controller callbacks make it possible to perform logic before or after launching an action. For example, say you launched the View action in the Posts controller. Before the View action is run by the controller, certain callbacks are checked for any content. By placing code in these callback actions, you can perform some logic for any and all actions before the action is executed, after it is executed, or just before the view is rendered. Let s say you wanted to restrict access to the View action; you could accomplish this in a callback action.

Application_Error()

The last topic you ll consider in this chapter is the ASP.NET configuration file system. Every web application includes a web.config file that configures fundamental settings everything from the way error messages are shown to the security settings that lock out unwanted visitors. You ll consider the settings in the web.config file throughout this book. (And there are many more settings that you won t consider in this book, because they re used much more rarely.) The ASP.NET configuration files have several key advantages: They are never locked: You can update web.config settings at any point, even while your application is running. If there are any requests currently under way, they ll continue to use the old settings, while new requests will get the changed settings right away. They are easily accessed and replicated: Provided you have the appropriate network rights, you can change a web.config file from a remote computer. You can also copy the web.config file and use it to apply identical settings to another application or another web server that runs the same application in a web farm scenario. The settings are easy to edit and understand: The settings in the web.config file are humanreadable, which means they can be edited and understood without needing a special configuration tool. In the following sections, you ll get a high-level overview of the web.config file and learn how ASP.NET s configuration system works.