c# - Get selected portion of image in picturebox in another picturebox

Question

I have a picturebox with image, in which I have drawn a rectangular selection. I want to get the selected portion of image in another picturebox. How can I get that? Please help.

Answer 1

然后使用选择的坐标创建Rectangle rectangle：

   Bitmap sourceBitmap = new Bitmap(pictureBoxImage);
   Bitmap croppedBitmap = sourceBitmap.Clone(rectangle, sourceBitmap.PixelFormat);

之后，您可以croppedBitmap在另一个图片框中使用。不要忘记处理未使用的图像。就这样。

Answer 2

假设您传入的rect是在您的坐标中计算的。您可以像这样使用并在另一个中获取该部分：RectangleGraphics.DrawRectanglepictureBoxRectangleToScreenRectangleToClientpictureBox

Rectangle portion = pictureBox2.RectagleToClient(pictureBox1.RectangleToScreen(rect));
//portion is the Rectangle calculated in the coordinates of pictureBox2.