Question

I create a program that zoom in/out an image.

But it doesn’t zoom to the center.

My picture box is in a panel and code is:

Image newImage = Image.FromFile("view.jpg");
pictureBox1.Width = (int)(newImage.Size.Width / ZoomLevel);
pictureBox1.Height = (int)(newImage.Size.Height / ZoomLevel);

Bitmap img = new Bitmap(newImage, 
                        (int)(newImage.Size.Width / ZoomLevel), 
                        (int)(newImage.Size.Height / ZoomLevel));
pictureBox1.SizeMode = PictureBoxSizeMode.CenterImage;
pictureBox1.Image = img;

I uploaded a sample project here. plz download this

I use Visual Studio 2008, C#, .Net 3.5

thanks in advance.

Answer 1

I think it is because you change the size of the picturebox.
it is centered but i can not see it because you always see all the picture.

try to remove the 2 rows the change the width and hight of the picturebox or set them to be constant like 1 or 2 or… if you want to it to be according to the picture:

first option:

Image newImage = Image.FromFile("view.jpg");
Bitmap img = new Bitmap(newImage, 
                        (int)(newImage.Size.Width / ZoomLevel), 
                        (int)(newImage.Size.Height / ZoomLevel));
pictureBox1.SizeMode = PictureBoxSizeMode.CenterImage;
pictureBox1.Image = img;

second option:

Image newImage = Image.FromFile("view.jpg");
pictureBox1.Width = (int)(newImage.Size.Width / 1);
pictureBox1.Height = (int)(newImage.Size.Height / 1);

Bitmap img = new Bitmap(newImage, 
                        (int)(newImage.Size.Width / ZoomLevel), 
                        (int)(newImage.Size.Height / ZoomLevel));
pictureBox1.SizeMode = PictureBoxSizeMode.CenterImage;
pictureBox1.Image = img;