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Graphics.DrawImage Method (Image, Point[], Rectangle, 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)

'Declaration
Public Sub DrawImage ( _
	image As Image, _
	destPoints As Point(), _
	srcRect As Rectangle, _
	srcUnit As GraphicsUnit _
)
'Usage
Dim instance As Graphics
Dim image As Image
Dim destPoints As Point()
Dim srcRect As Rectangle
Dim srcUnit As GraphicsUnit

instance.DrawImage(image, destPoints, srcRect, srcUnit)
public void DrawImage (
	Image image, 
	Point[] destPoints, 
	Rectangle srcRect, 
	GraphicsUnit srcUnit
)
public function DrawImage (
	image : Image, 
	destPoints : Point[], 
	srcRect : Rectangle, 
	srcUnit : GraphicsUnit
)
Not applicable.

Parameters

image

Image to draw.

destPoints

Array of three Point structures that define a parallelogram.

srcRect

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

srcUnit

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

Exception typeCondition

ArgumentNullException

image is a null reference (Nothing in Visual Basic).

The destPoints parameter specifies three points of a parallelogram. The three Point structures represent the upper-left, upper-right, and lower-left corners of the parallelogram. The fourth point is extrapolated from the first three to form a parallelogram.

The srcRect parameter specifies a rectangular portion of the image object to draw. This portion is scaled and sheared to fit inside the parallelogram specified by the destPoints parameter.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, 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 points that define a parallelogram in which to draw the image.

  • Creates a rectangle to select the portion of the image to draw.

  • Sets the graphics drawing unit to pixel.

  • Draws the image to the screen.

The position of the parallelogram locates the image on the screen, and the size of the rectangle and the size and shape of the parallelogram determines the scaling and shearing of the drawn image.

Private Sub DrawImageParaRect(ByVal e As PaintEventArgs)

    ' Create image.
    Dim newImage As Image = Image.FromFile("SampImag.jpg")

    ' Create parallelogram for drawing image.
    Dim ulCorner As New Point(100, 100)
    Dim urCorner As New Point(325, 100)
    Dim llCorner As New Point(150, 250)
    Dim destPara As Point() = {ulCorner, urCorner, llCorner}

    ' Create rectangle for source image.
    Dim srcRect As New Rectangle(50, 50, 150, 150)
    Dim units As GraphicsUnit = GraphicsUnit.Pixel

    ' Draw image to screen.
    e.Graphics.DrawImage(newImage, destPara, srcRect, units)
End Sub

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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