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Precompilation
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There are a couple of different ways to precompile your site. One does an in-place compilation, which basically has the effect of making the first request for each page and leaves the application ready for live requests. This is done on the production server after deployment. The other option precompiles before deployment, which creates a copy of your website suitable for deployment. This copy compiles all code-behind and classes in the App_Code folder into assemblies that it places in the bin directory. Only files needed at runtime are copied into this folder. Using this option reduces the flexibility you have in deploying changes, but it keeps your source code off the production servers and improves the performance of the first request of the pages. For both options, you use the aspnet_compiler command line tool. To precompile in place, simply pass the tool the v switch and the virtual directory of the application you want compiled: aspnet_compiler v /Web03 Precompilation for deployment works the same way: You simply need to further specify a target location where the precompiler will place the compiled image ready for deployment: aspnet_compiler v /Web03 c:\ProductionImage This site is all packed up and ready to go now (see Figure 3-13). You can open the directory with VS .NET 2K5 to use the deployment tool, XCopy the files, or FTP them to the production box.
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Figure 3-13. The production ready, precompiled image of the Web03 application
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CHAPTER 3 PAGE OBJECT INTERNALS
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Basics of the Control Type
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In examining the ASPX markup, the class that gets generated from it, and the code-behind that it compiles with, we ve looked at all of the types that have the Page object in their inheritance trees. This is where code for the least general functionality goes. The code of the Page object itself is then the first class in the object graph that contains general functionality. This is familiar territory, as it s leveraged to create every ASP .NET page. We re talking about the Init and Load events of the Page type, the various server-side event traps, like Button.Click or TextBox.TextChanged, you can set up to trap events as they occur on the client. The Page level events, however, aren t specific to the Page type. If you follow the inheritance chain of the Page class up, you ll find the old familiar Control type. System.Web.UI.Control is the base type for every element you put on a web page. It s a base type for HTML Controls, for Web Controls, for User Controls, and for Custom Controls. It s very interesting to note that it s also a base type for the Page class itself. This means that the properties and methods of this type are exposed on practically everything you interact with programmatically on your page and on your Page object as well. Thus, understanding what s housed within this type is learning you can leverage everywhere in your development of Web Forms. Table 3-1. A Sample of Members from System.Web.UI.Control
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Member Name
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Controls
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Type
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ControlCollection
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Meaning in Life
This is a strong-typed collection of Control objects. The Page type s Control collection is what stores the base elements of your web page. Elements that are children of other elements then become instances of the Control type in their parent element s control collection. Together these aggregated ControlCollections create an in-memory tree of Control objects that models the hierarchy of the resulting web page. We ll be examining the ControlCollection in greater detail as we move forward. This new feature of ASP .NET 2.0 separates information critical to the functionality of the control from content-based ViewState information. This allows you to turn off ViewState without losing the ability to store some state on the client. This is a big problem with version 1.x Web Forms, which ControlState fixes in the new version. (See 4 for details on ControlState.) Using this Boolean, you can turn off the ViewState of any control. This is the data that gets squirreled away by individual controls in the hidden input that goes to the client. By persisting data to a hidden input on the client, the information gets POSTed back to the server, and so it becomes possible to restore that state on postbacks. The downside is this hidden input can get extremely large extremely fast, and performance suffers as you start moving all that data across the connection to your client and back to the server with a post. (We ll examine some best practices for minimizing the ViewState size in
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