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CSharp_Graphics

Компиляция кода

Создайте форму Windows Forms и перейдите к обработчику события Paint этой формы. Вставьте приведенный выше код в обработчик события Paint. Подставьте вместо Texture.jpg имя имеющегося на вашем компьютере файла изображения.

Using a Brush to Fill Shapes

A GDI+ Brush object is used to fill the interior of a closed shape. GDI+ defines several fill styles: solid color, hatch pattern, image texture, and color gradient.

How to: Fill a Shape with a Solid Color

To fill a shape with a solid color, create a SolidBrush object, and then pass that SolidBrush object as an argument to one of the fill methods of the Graphics class. The following example shows how to fill an ellipse with the color red.

Example

In the following code, the SolidBrush constructor takes a Color object as its only argument. The values used by the FromArgb method represent the alpha, red, green, and blue components of the color. Each of these values must be in the range 0 through 255. The first 255 indicates that the color is fully opaque, and the second 255 indicates that the red component is at full intensity. The two zeros indicate that the green and blue components both have an intensity of 0.

The four numbers (0, 0, 100, 60) passed to the FillEllipse method specify the location and size of the bounding rectangle for the ellipse. The rectangle has an upper-left corner of (0, 0), a width of 100, and a height of 60.

SolidBrush solidBrush = new SolidBrush(

Color.FromArgb(255, 255, 0, 0));

e.Graphics.FillEllipse(solidBrush, 0, 0, 100, 60);

Compiling the Code

The preceding example is designed for use with Windows Forms, and it requires PaintEventArgs e, which is a parameter of the Paint event handler.