如何使用C＃裁剪图像？ [英] How to crop an image using C#?

问题描述

我怎么能写会在C＃裁剪图像的应用程序？

How can I write an application that will crop images in C#?

推荐答案

您可以使用 Graphics.DrawImage 绘制裁剪图像到图形从位图对象。

You can use Graphics.DrawImage to draw a cropped image onto the graphics object from a bitmap.

Rectangle cropRect = new Rectangle(...);
Bitmap src = Image.FromFile(fileName) as Bitmap;
Bitmap target = new Bitmap(cropRect.Width, cropRect.Height);

using(Graphics g = Graphics.FromImage(target))
{
   g.DrawImage(src, new Rectangle(0, 0, target.Width, target.Height), 
                    cropRect,                        
                    GraphicsUnit.Pixel);
}

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