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The NET Framework includes the CultureInfo class, which contains specific information for a particular culture For instance, it would contain information about language, calendars, country or region, date formatting, and currency formatting, to name but a few elements A unique name exists for each culture these names can be found in the SDK documentation that comes with the NET Framework In our college application, we will localize the text on the Add New Student button and then change the display by changing the locale settings in the Control Panel Follow these steps to accomplish this: 1 Set the Localizable property of the form to True 2 Set the needed languages for the form using the Language property Each language will have its own resource file 3 With the Language property of the form set to the new language, change the text of the controls 4 Add any localized text strings by selecting Project | Add New Item | Assembly Resource File from the menus Add entries into the resource file 5 Add the necessary using directives:
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using SystemGlobalization; using SystemResources; using SystemThreading;
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6 Retrieve the locale from the Control Panel settings:
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ThreadCurrentThreadCurrentUICulture = ThreadCurrentThreadCurrentCulture;
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To set the locale for the application, use the preceding code
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7 Create a resource manage object:
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ResourceManager rm = new ResourceManager ("<resource file>", AssemblyGetExecutingAssembly());
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24: Configuring a Windows Application
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8 Set the Regional Options of your computer to the new language
PART IV
9 Run your application under the new regional settings Notice in Figure 24-15 that the Add New Student button has changed to the French version EXAM TIP The Localizable property, when set to True, creates a new resource file for each new language that the user adds
Using SystemDrawing
If you want to build your own controls, or draw your own elements on a form, you will need to use the SystemDrawing namespace The namespace contains many classes that will help you draw on a form, such as Color, Point, Rectangle, Icon, Image, Graphics, Pen, StringFormat, and many, many more We will only deal with the issues that may be pertinent to the Windows exam, since this is a very specific area of study Keep the following points in mind for the exam: The Graphics class contains many of the methods that you will use to draw Some of these methods include: DrawArc, DrawCurve, DrawLine, DrawRectangle, FillRectangle, and RotateTransform, along with many others
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Create a Graphics object in order to draw lines and shapes or manipulate images The object represents a GDI+ (Graphical Device Interface) drawing surface and is used to create graphical images
Graphics g = thisCreateGraphics();
GDI+ is stateless, which means that a graphics object will not hold its properties You must always pass the properties to any of the methods (properties like color, pen, brush, and so forth) Create a new Color object as follows:
Color myColor = ColorFromArgb (127, 182, 145);
Some of the other namespaces that may be used include the following:
SystemDrawingDrawing2D SystemDrawingImaging SystemDrawingPrinting SystemDrawingDesign SystemDrawingText
Figure 24-15
The form with a localized button
24: Configuring a Windows Application
The following code segment will produce a small graphic and show you how to manipulate the Graphics object
// create a new Graphics object Graphics g = thisCreateGraphics(); // display the window thisShow(); // create a pen object with which to draw our rectangle Pen redPen = new Pen (ColorRed, 3); // draw a rectangle gDrawRectangle (redPen, 100, 100, 100, 100);
The result of the preceding code is shown in the following illustration
PART IV
Summary
In this chapter, we have dealt with a number of exam topics Make sure that you feel comfortable with configuring a Windows application and setting security both role-based and code-access security You should also know the techniques for optimizing the performance of a Windows application, paying close attention to precompiling as a valuable technique for saving system resources You may find a little on the exam regarding user assistance in the form of ToolTips, help menu items, and context-sensitive help Also spend some time on localizing a Windows Form, as you will need to know the classes that retrieve system information from the local computer and determine the locale of the application s runtime This completes the fourth part of this book the Windows exam By now you should be experienced at creating Windows applications and working with the code that accompanies the graphical interface Prepare yourself for the exam by going through the questions at the end of each chapter, and then take the practice test on the accompanying CD That should prepare you for the exam Of course, there s nothing like experience so work with C# as much as you can
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