c# 图片剪裁

Question

类似QQ截图功能
从图片的指定位置开始剪裁到指定位置 生成另外张图

Answer 1

只试过Winform下的.
        private void screenPic(int left, int top, int Width, int Height, string filepath)
        {
            Rectangle roi = new Rectangle(left, top, Width, Height);            using (Bitmap bmp = new Bitmap(roi.Width, roi.Height))
            using (Graphics g = Graphics.FromImage(bmp))
            {
                g.CopyFromScreen(this.PointToScreen(roi.Location), Point.Empty, roi.Size);
                bmp.Save(filepath, System.Drawing.Imaging.ImageFormat.Jpeg);
            }
        }

Answer 2

  g.CopyFromScreen(this.PointToScreen(roi.Location), Point.Empty, roi.Size);PointToScreen是什么东东

Answer 3

-------------将指定工作区点的位置计算成屏幕坐标。命名空间：  System.Windows.Forms