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family. As you work through this appendix, however, you will gain a firm foundation that you can build on. In any case, be sure to check out the .NET Framework 4.0 SDK documentation for additional details.

As you might expect, modern .NET IDEs (e.g., Visual Studio 2010, C# 2010 Express, and SharpDevelop) provide numerous form designers, visual editors, and integrated code-generation tools (wizards) to facilitate the construction of Windows Forms applications. These tools are extremely useful, but they can also hinder the process of learning Windows Forms, because these same tools tend to generate a good deal of boilerplate code that can obscure the core object model. Given this, you will create your first Windows Forms example using a Console Application project as a starting point. Begin by creating a Console Application named SimpleWinFormsApp. Next, use the Project Add Reference menu option to set a reference to the System.Windows.Forms.dll and System.Drawing.dll assemblies through the .NET tab of the resulting dialog box. Next, update your Program.cs file with the following code: using using using using System; System.Collections.Generic; System.Linq; System.Text;

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Figure 35-8. An Atlas-ready web form You can fill in the Atlas script block to gain access to the TextBox controls, the button, and the <span> element. Here s the script block you need: <page xmlns:script="http://schemas.microsoft.com/xml-script/2005"> <components> <textBox id="txtFirst" /> <textBox id="txtLast" /> <button id="cmdOK" /> <label id="spanResult" /> </components> </page> </script> Notice that the Atlas script block doesn t contain any style or layout information. That s because these details are already coded in the HTML portion of the page.

// The minimum required windows forms namespaces. using System.Windows.Forms; namespace SimpleWinFormsApp { // This is the application object. class Program { static void Main(string[] args) { Application.Run(new MainWindow()); } } // This is the main window. class MainWindow : Form {} }

Although the control class names use Pascal case (as in TextBox), the XML elements you use to define these controls must use camel case (as in textBox). This is the same rule that applies with web.config settings.

Note When Visual Studio 2010 finds a class that extends System.Windows.Forms.Form, it attempts to open the related GUI designer (provided this class is the first class in the C# code file). Double-clicking the Program.cs file from the Solution Explorer opens the designer, but don t do that yet! You will work with the Windows Forms designer in the next example; for now, be sure you right-click on the C# file containing your code within the Solution Explorer and select the View Code option.

In this example, the Atlas controls appear in the same order as the HTML elements on the page. However, this isn t a requirement. It s perfectly fine to place them in any order, as long as you use the correct control IDs. If you re defining Atlas controls that map to ASP.NET controls, you should remember the following quirks: Many controls generate more than one element. Usually in this case, the containing element will have the ID. For example, if you use the Calendar control, it renders itself as an HTML table, and the root <table> tag has the id attribute. If you place a control inside a naming container, its ID will change. You ll notice this effect if you place a control into a template for a rich data control (such as the GridView) or if you place a control in a master page. You can get the correct ID from the ClientID property. If in doubt, just take a look at the rendered HTML of your page to find out the exact ID value and to see where they re applied. The Atlas script block is just a starting point. To actually do anything with these controls, you ll need to add actions, behaviors, or bindings. In the following sections, you ll learn how to create a simple Atlas script block for several sample pages, and you ll see what it allows you to do.

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