C#：使用滚动条缩放图片框图像的简单而实用的方法
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C#: Simple and functional way to zoom picturebox images with scroll bars
提问by Marco Frost
Is there a simple and functional way to zoom an image in a picturebox including scroll bars?
是否有一种简单且实用的方法可以在包含滚动条的图片框中缩放图像？
At the moment, I use a picture box in a panel with auto scroll activated. To zoom, I enlarge the picturebox and move it with the scroll bars on the panel. The problem is, that it behaves strange. For example: If you zoom in to far, the margin between the upper and left form border and the image get's bigger and bigger.
目前，我在激活自动滚动的面板中使用图片框。要缩放，我放大图片框并使用面板上的滚动条移动它。问题是，它的行为很奇怪。例如：如果放大到远处，表格的上下边框与图像之间的边距会越来越大。
That's the zooming method. I got it from here.
这就是缩放方法。我从这里得到的。
private void ZoomInOut(bool zoom)
{
//Zoom ratio by which the images will be zoomed by default
int zoomRatio = 10;
//Set the zoomed width and height
int widthZoom = pictureBox_viewer.Width * zoomRatio / 100;
int heightZoom = pictureBox_viewer.Height * zoomRatio / 100;
//zoom = true --> zoom in
//zoom = false --> zoom out
if (!zoom)
{
widthZoom *= -1;
heightZoom *= -1;
}
//Add the width and height to the picture box dimensions
pictureBox_viewer.Width += widthZoom;
pictureBox_viewer.Height += heightZoom;
}
Any help is appreciated.
任何帮助表示赞赏。
Thanks in advance.
提前致谢。
Marco
马可
EDIT:Two screenshots of an unzoomed and a zoomed (16 times) image.
Pay attention to the margin between the upper border of the image and the upper border of the form.
编辑：未缩放和缩放（16 倍）图像的两个屏幕截图。注意图像上边框与表单上边框之间的边距。
采纳答案by Aseem Gautam
I think its better to zoom(rescale) the image and not the picture box. Take a look at this article - http://www.codeproject.com/Articles/21097/PictureBox-Zoom
我认为最好缩放（重新缩放）图像而不是图片框。看看这篇文章 - http://www.codeproject.com/Articles/21097/PictureBox-Zoom
And
和
