Export (0) Print
Expand All
Expand Minimize

Graphics::DrawImage Method (Image, RectangleF, RectangleF, GraphicsUnit)

Draws the specified portion of the specified Image at the specified location and with the specified size.

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

public:
void DrawImage(
	Image^ image, 
	RectangleF destRect, 
	RectangleF srcRect, 
	GraphicsUnit srcUnit
)

Parameters

image
Type: System.Drawing::Image

Image to draw.

destRect
Type: System.Drawing::RectangleF

RectangleF structure that specifies the location and size of the drawn image. The image is scaled to fit the rectangle.

srcRect
Type: System.Drawing::RectangleF

RectangleF structure that specifies the portion of the image object to draw.

srcUnit
Type: System.Drawing::GraphicsUnit

Member of the GraphicsUnit enumeration that specifies the units of measure used by the srcRect parameter.

ExceptionCondition
ArgumentNullException

image is nullptr.

The srcRect parameter specifies a rectangular portion of the image object to draw. This portion is scaled to fit inside the rectangle specified by the destRect parameter.

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 destination rectangle in which to draw the image.

  • Creates a source rectangle from which to extract a portion of the image.

  • Sets the unit of measure of the source rectangle to pixels.

  • Draws the image to the screen.

The position of the destination rectangle locates the image on the screen, the sizes of the source and destination rectangles determine the scaling of the drawn image, and the size of the source rectangle determines what portion of the original image is drawn to the screen.

public:
   void DrawImageRectFRectF( PaintEventArgs^ e )
   {
      // Create image.
      Image^ newImage = Image::FromFile( "SampImag.jpg" );

      // Create rectangle for displaying image.
      RectangleF destRect = RectangleF(100.0F,100.0F,450.0F,150.0F);

      // Create rectangle for source image.
      RectangleF srcRect = RectangleF(50.0F,50.0F,150.0F,150.0F);
      GraphicsUnit units = GraphicsUnit::Pixel;

      // Draw image to screen.
      e->Graphics->DrawImage( newImage, destRect, srcRect, units );
   }

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
Show:
© 2015 Microsoft