Graphics.DrawImageUnscaled Method

Definition

Namespace:

System.Drawing

Assembly:

System.Drawing.Common.dll

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

Overloads

DrawImageUnscaled(Image, Int32, Int32)	Draws the specified image using its original physical size at the location specified by a coordinate pair.
DrawImageUnscaled(Image, Int32, Int32, Int32, Int32)	Draws a specified image using its original physical size at a specified location.
DrawImageUnscaled(Image, Point)	Draws a specified image using its original physical size at a specified location.
DrawImageUnscaled(Image, Rectangle)	Draws a specified image using its original physical size at a specified location.

DrawImageUnscaled(Image, Int32, Int32)

Source:

Graphics.cs

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

C#

public void DrawImageUnscaled(System.Drawing.Image image, int x, int y);

Parameters

image

Image

Image to draw.

x

Int32

The x-coordinate of the upper-left corner of the drawn image.

y

Int32

The y-coordinate of the upper-left corner of the drawn image.

Exceptions

ArgumentNullException

image is null.

Examples

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.

C#

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);
}

Remarks

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.

DrawImageUnscaled(Image, Int32, Int32, Int32, Int32)

Source:

Graphics.cs

Draws a specified image using its original physical size at a specified location.

C#

public void DrawImageUnscaled(System.Drawing.Image image, int x, int y, int width, int height);

Parameters

image

Image

Image to draw.

x

Int32

The x-coordinate of the upper-left corner of the drawn image.

y

Int32

The y-coordinate of the upper-left corner of the drawn image.

width

Int32

Not used.

height

Int32

Not used.

Exceptions

ArgumentNullException

image is null.

Remarks

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.

DrawImageUnscaled(Image, Point)

Source:

Graphics.cs

Draws a specified image using its original physical size at a specified location.

C#

public void DrawImageUnscaled(System.Drawing.Image image, System.Drawing.Point point);

Parameters

image

Image

Image to draw.

point

Point

Point structure that specifies the upper-left corner of the drawn image.

Exceptions

ArgumentNullException

image is null.

Examples

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.

C#

public void DrawImageUnscaledPoint(PaintEventArgs e)
{
             
    // Create image.
    Image newImage = Image.FromFile("SampImag.jpg");
             
    // Create point for upper-left corner of image.
    Point ulCorner = new Point(100, 100);
             
    // Draw image to screen.
    e.Graphics.DrawImageUnscaled(newImage, ulCorner);
}

Remarks

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.

DrawImageUnscaled(Image, Rectangle)

Source:

Graphics.cs

Draws a specified image using its original physical size at a specified location.

C#

public void DrawImageUnscaled(System.Drawing.Image image, System.Drawing.Rectangle rect);

Parameters

image

Image

Image to draw.

rect

Rectangle

Rectangle that specifies the upper-left corner of the drawn image. The X and Y properties of the rectangle specify the upper-left corner. The Width and Height properties are ignored.

Exceptions

ArgumentNullException

image is null.

Remarks

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.