[源码分享]等比例压缩图片

压缩图片的代码，很简单的比例问题。献个丑

        /// <summary>        /// 压缩图片（小图片扩大成大图片的逻辑我没写，其实跟压缩一样的道理）        /// </summary>        /// <param name="FilePath">源文件路径</param>        /// <param name="saveFilePath">目标另存路径（带文件名）</param>        /// <param name="width"></param>        /// <param name="height"></param>        public static void YaSuo(string FilePath, string saveFilePath, float width, float height)        {            FileStream st = File.Open(FilePath, FileMode.Open);            Image img = new Bitmap(st);                        Image imgNew = new Bitmap(Convert.ToInt32( width),Convert.ToInt32( height));            Graphics g = Graphics.FromImage(imgNew);            float nWidth, nHeight;                       if (img.Width > width)            {                nWidth = width;                nHeight =  width / img.Width * img.Height;            }            else if (img.Height > height)            {                nHeight = height;                nWidth = height / img.Height * img.Width;            }            else//如果输入的是小图片，则需放大，此处逻辑我没写，防抠代码！仅供参考            {                nWidth = width;                nHeight = height;            }            g.DrawImage(img, 0, 0, nWidth, nHeight);            imgNew.Save(saveFilePath);        }