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Método Graphics.DrawImage (Image, PointF)

 

Desenha o Image especificado, usando seu tamanho físico original, no local especificado.

Namespace:   System.Drawing
Assembly:  System.Drawing (em System.Drawing.dll)

public void DrawImage(
	Image image,
	PointF point
)

Parâmetros

image
Type: System.Drawing.Image

Image a ser desenhado.

point
Type: System.Drawing.PointF

Uma estrutura PointF que representa o canto superior esquerdo da imagem desenhada.

Exception Condition
ArgumentNullException

image é null.

An T:System.Drawing.Image stores a value for pixel width and a value for horizontal resolution (dots per inch). The physical width, measured in inches, of an image is the pixel width divided by the horizontal resolution. For example, an image with a pixel width of 216 and a horizontal resolution of 72 dots per inch has a physical width of 3 inches. Similar remarks apply to pixel height and physical height.

This method draws an image using its physical size, so the image will have its correct size in inches regardless of the resolution (dots per inch) of the display device. For example, suppose an image has a pixel width of 216 and a horizontal resolution of 72 dots per inch. If you call this method to draw that image on a device that has a resolution of 96 dots per inch, the pixel width of the rendered image will be (216/72)*96 = 288.

The following code example is designed for use with Windows Forms, and it requires T:System.Windows.Forms.PaintEventArgse, which is a parameter of the E:System.Windows.Forms.Control.Paint event handler. The code performs the following actions:

  • Creates an image from a JPEG file SampImag.jpg in the folder of the example.

  • Creates a point at which to draw the upper-left corner of the image.

  • Draws the unscaled image to the screen.

private void DrawImagePointF(PaintEventArgs e)
{

    // Create image.
    Image newImage = Image.FromFile("SampImag.jpg");

    // Create point for upper-left corner of image.
    PointF ulCorner = new PointF(100.0F, 100.0F);

    // Draw image to screen.
    e.Graphics.DrawImage(newImage, ulCorner);
}

.NET Framework
Disponível desde 1.1
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