取原图旋转角度(IOS和Android相机拍的照片) 自动旋转

      

  /// <summary>  
        /// 获取原图旋转角度(IOS和Android相机拍的照片)  
        /// </summary>  
        /// <param name="path"></param>  
        /// <returns></returns>  
        public static int readPictureDegree(string path)
        {
            int rotate = 0;
            using (var image = System.Drawing.Image.FromFile(path))
            {
                foreach (var prop in image.PropertyItems)
                {
                    if (prop.Id == 0x112)
                    {
                        if (prop.Value[0] == 6)
                            rotate = 90;
                        if (prop.Value[0] == 8)
                            rotate = -90;
                        if (prop.Value[0] == 3)
                            rotate = 180;
                        prop.Value[0] = 1;
                    }
                }
            }
            return rotate;
        }


        /// <summary>  
        /// 旋转  
        /// 解释：
        /// 顺时针旋转90度 RotateFlipType.Rotate90FlipNone
        ///逆时针旋转90度 RotateFlipType.Rotate270FlipNone
        ///水平翻转 RotateFlipType.Rotate180FlipY
        ///垂直翻转 RotateFlipType.Rotate180FlipX
        /// 
        /// </summary>  
        /// <param name="path"></param>  
        /// <param name="rotateFlipType"></param>  
        /// <returns></returns>  
        public bool KiRotate(string path, RotateFlipType rotateFlipType)
        {
            try
            {
                using (Bitmap bitmap = new Bitmap(path))
                {
                    bitmap.RotateFlip(rotateFlipType);
                    bitmap.Save(path);
                }
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }