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Graphics.DrawImageUnscaled Method (Image, Int32, Int32)

Draws the specified image using its original physical size at the location specified by a coordinate pair.

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

public void DrawImageUnscaled(
	Image image,
	int x,
	int y
)

Parameters

image
Type: System.Drawing.Image
Image to draw.
x
Type: System.Int32
The x-coordinate of the upper-left corner of the drawn image.
y
Type: System.Int32
The y-coordinate of the upper-left corner of the drawn image.

ExceptionCondition
ArgumentNullException

image is null.

An 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.

The DrawImageUnscaled 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 DrawImageUnscaled 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 PaintEventArgs e, which is a parameter of the 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 entire image using its physical size.


public void DrawImageUnscaledInt(PaintEventArgs e)
{

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

    // Create coordinates for upper-left corner of image.
    int x = 100;
    int y = 100;

    // Draw image to screen.
    e.Graphics.DrawImageUnscaled(newImage, x, y);
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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