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Two questions about the PictureBox control

 
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Two questions about the PictureBox control
cygnusX
17 Apr, 2008 - 12:34 AM
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1.When i zoom the image in a PictureBox and then zoom out the quality of the image is reduced.I'm using this code for zoom in and zoom out:

CODE
//zoom in
Image image = new Bitmap(pictureBox.Image, pictureBox.Image.Width + 50, pictureBox.Image.Height + 50);
pictureBox.Image = image;

//zoom out
Image image = new Bitmap(pictureBox.Image, pictureBox.Image.Width - 50, pictureBox.Image.Height - 50);
pictureBox.Image = image;

How to achieve zoom in and zoom out without affecting the quality of the image?

2.How to move the image in PictureBox?I mean when the image is zoomed i'm drawing vertical and horizontal scrollbars but i don't know what to do after that...

This post has been edited by cygnusX: 17 Apr, 2008 - 12:35 AM
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Jayman
RE: Two Questions About The PictureBox Control
17 Apr, 2008 - 08:26 AM
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Anytime time you physically resize an image to a larger size, the image quality is going to degrade. This is due to the fact the the picture uses a fixed resolution. So when you resize, the resolution stays the same. The dots that make up the picture just get bigger, hence the pixelation of the image.

Your best bet to avoid this is to have two different size images and just swap out the picture in the PictureBox when you want the larger/smaller picture.
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