Andy De George
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title, ms.date, dev_langs, helpviewer_keywords, ms.assetid
| title | ms.date | dev_langs | helpviewer_keywords | ms.assetid | |||||||||||
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| Drawing, Positioning, and Cloning Images in GDI+ | 03/30/2017 |
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Drawing, Positioning, and Cloning Images in GDI+
You can use the xref:System.Drawing.Bitmap class to load and display raster images, and you can use the xref:System.Drawing.Imaging.Metafile class to load and display vector images. The xref:System.Drawing.Bitmap and xref:System.Drawing.Imaging.Metafile classes inherit from the xref:System.Drawing.Image class. To display a vector image, you need an instance of the xref:System.Drawing.Graphics class and a xref:System.Drawing.Imaging.Metafile. To display a raster image, you need an instance of the xref:System.Drawing.Graphics class and a xref:System.Drawing.Bitmap. The instance of the xref:System.Drawing.Graphics class provides the xref:System.Drawing.Graphics.DrawImage%2A method, which receives the xref:System.Drawing.Imaging.Metafile or xref:System.Drawing.Bitmap as an argument.
File Types and Cloning
The following code example shows how to construct a xref:System.Drawing.Bitmap from the file Climber.jpg and displays the bitmap. The destination point for the upper-left corner of the image, (10, 10), is specified in the second and third parameters.
[!code-csharpSystem.Drawing.ImagesBitmapsMetafiles#11] [!code-vbSystem.Drawing.ImagesBitmapsMetafiles#11]
The following illustration shows the image.
You can construct xref:System.Drawing.Bitmap objects from a variety of graphics file formats: BMP, GIF, JPEG, EXIF, PNG, TIFF, and ICON.
The following code example shows how to construct xref:System.Drawing.Bitmap objects from a variety of file types and then displays the bitmaps.
[!code-csharpSystem.Drawing.ImagesBitmapsMetafiles#12] [!code-vbSystem.Drawing.ImagesBitmapsMetafiles#12]
The xref:System.Drawing.Bitmap class provides a xref:System.Drawing.Bitmap.Clone%2A method that you can use to make a copy of an existing xref:System.Drawing.Bitmap. The xref:System.Drawing.Bitmap.Clone%2A method has a source rectangle parameter that you can use to specify the portion of the original bitmap that you want to copy. The following code example shows how to create a xref:System.Drawing.Bitmap by cloning the top half of an existing xref:System.Drawing.Bitmap. Then both images are drawn.
[!code-csharpSystem.Drawing.ImagesBitmapsMetafiles#13] [!code-vbSystem.Drawing.ImagesBitmapsMetafiles#13]
The following illustration shows the two images.
