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private void Form1_Paint(PaintEventArgs e) { TextFormatFlags flags = TextFormatFlags.Bottom | TextFormatFlags.EndEllipsis; TextRenderer.DrawText(e.Graphics, "This text drawn with GDI.", this.Font, new Rectangle(10, 10, 100, 50), SystemColors.ControlText, flags); } The Windows Forms team faced a bit of a dilemma when they created the TextRenderer namely, whether they should use it for better rendering in the standard .NET controls, even though it could alter existing applications (due to subtly different measuring and wrapping conventions). They settled on allowing controls to decide what rendering behavior to use based on a new Control.UseCompatibleTextRendering property. This property defaults to true, which means that the control should use the same rendering as it did in .NET 1.x. If you set this property to false, however, the control should switch to the TextRenderer. Of course, it s up to the control itself to check this property in its painting code and use the TextRenderer simply setting the property on a control that doesn t use it has no effect. However, you ll notice that the .NET controls do respect the UseCompatibleTextRendering property. To have the least effect on existing applications, UseCompatibleTextRendering defaults to true. Rather than set this property for each control in your application, you can call the Application. SetCompatibleTextRenderingDefault() method. In fact, every new Windows application created with Visual Studio 2005 automatically inserts a call to this method that passes an argument of false, thereby upgrading all standard controls to the TextRenderer.

As you ve learned, the Graphics class allows you to draw all the basic ingredients lines, rectangles, ellipses, arcs, polygons, curves, and strings of text. The GraphicsPath allows you to combine a group of these elements into a single unit. You can then draw them all at once, or perform other tasks like hit testing. To build a GraphicsPath object, you simply create a new instance, and use the methods in Table 7-5 to add all the required elements. Here s an example that creates a GraphicsPath made up of an ellipse and a rectangle: GraphicsPath path = new GraphicsPath(); path.AddEllipse(0, 0, 100, 50); path.AddRectangle(new Rectangle(100, 50, 100, 50)); These two shapes can overlap, but they don t need to. Either way, both shapes are merged into one logical entity for future manipulation. Once you ve created the GraphicsPath object, you can copy it onto the drawing surface using the DrawPath() and FillPath() methods of the Graphics object: e.Graphics.DrawPath(pen, path); When you re finished, remember to clean up by disposing the path: path.Dispose(); Using the GraphicsPath, you also can create a solid-filled figure out of line segments. To do this, you first call the StartFigure() method. Then you add the required curves and lines using

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The DAAB is Microsoft s implementation of the DAO design concept. The DAAB is useful for the following reasons: It shields the underlying implementation of database-specific tasks from application code. For instance, instead of calling the OracleAQQueue class directly in your application code, you could place it in the DAAB and expose its functionality through a more abstract interface. This way, if Oracle changes or enhances the implementation of OracleAQQueue, you wouldn t need to make changes everywhere in your application code. The changes would only be localized to the DAAB. It handles all the plumbing required for the configuration and encryption of connection strings, provider types, and so on. It is highly reusable and extensible; for example, you can create extensions to the DAAB to support other database types like MySQL or DB2. It already conforms to best practices, is well-tested code, and comes with full source code available for you to tweak.

Figure 15-3. The MySQL Administrator common connection dialog box You can enter your information in to the text boxes provided for server hostname, username, and password. However, since you ll presumably be using this tool more than once, you can set up a stored connection so you don t need to repeatedly enter this information. To do so, select Open Connection Editor in the Stored Connection drop-down box. This will bring up the Preferences dialog box, shown in Figure 15-4.

Figure 8-9. Data binding with other text box properties The following code runs when this form first loads. To work, it requires that the System.Drawing and System.Drawing.Text namespaces be imported. // These are our final data sources: two ArrayList objects. List<Font> fontList = new List<Font>(); List<Color> colorList = new List<Color>(); // The InstalledFonts collection allows us to enumerate installed fonts. // Each FontFamily needs to be converted to a genuine Font object // before it is suitable for data binding to the Control.Font property. InstalledFontCollection InstalledFonts = new InstalledFontCollection(); foreach (FontFamily family in InstalledFonts.Families) { try { fontList.Add(new Font(family, 12)); } catch { // We end up here if the font could not be created // with the default style. } } // To retrieve the list of colors, we need to first retrieve // the strings for the KnownColor enumeration, and then convert each one // into a suitable color object. string[] colorNames; colorNames = System.Enum.GetNames(typeof(KnownColor)); TypeConverter cnvrt = TypeDescriptor.GetConverter(typeof(KnownColor));

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