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How to get thumbnail of an Image?

Posted By:Jean Paul       Posted Date: October 07, 2010    Points: 15    Category: Windows Form Controls    URL: http://www.dotnetspark.com  

Thumbnails are reduced-size versions of pictures. Using the Bitmap class we can create reduced version of images. That would be memory efficient if we are dealing with a bulk of images to be shown as thumbnail. Instead of shrinking the original sized image, we can create a thumbnail using the GetThumbnail() method in C#.

// Create a windows forms application with 2 picture boxes. Keep the picture in a picturbox1

Bitmap bitmap = new Bitmap(pictureBox1.Image);
Image.GetThumbnailImageAbort callback = delegate () { return false; };
Image thumbnail = bitmap.GetThumbnailImage(20, 20,callback, IntPtr.Zero);

pictureBox2.Image = thumbnail;


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