/// <summary>    /// 屏幕操作类    /// Add by 2017-07-25    /// 1、屏幕生成Image 方法    /// 2、Image按百分比压缩 方法    /// 3、Image根据指定像素生成方法    /// </summary>    public class ScreenOper    {        [DllImport("user32.dll")]        static extern bool GetCursorInfo(out CURSORINFO pci);        private const Int32 CURSOR_SHOWING = 0x00000001;        [StructLayout(LayoutKind.Sequential)]        struct POINT        {            public Int32 x;            public Int32 y;        }        [StructLayout(LayoutKind.Sequential)]        struct CURSORINFO        {            public Int32 cbSize;            public Int32 flags;            public IntPtr hCursor;            public POINT ptScreenPos;        }        /// <summary>        /// 屏幕截图方法         /// 1、将整个屏幕截图        /// 2、并画出鼠标形状        /// </summary>        /// <returns></returns>        public static Image ScreenToImg()        {            Image myimage = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);            Graphics g = Graphics.FromImage(myimage);            g.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height));            CURSORINFO pci;            pci.cbSize = Marshal.SizeOf(typeof(CURSORINFO));            GetCursorInfo(out pci);            System.Windows.Forms.Cursor cur = new System.Windows.Forms.Cursor(pci.hCursor);            cur.Draw(g, new Rectangle(pci.ptScreenPos.x - 10, pci.ptScreenPos.y - 10, cur.Size.Width, cur.Size.Height));            return myimage;        }        /// <summary>        /// 将图片按百分比压缩，flag取值1到100，越小压缩比越大        /// </summary>        /// <param name="iSource"></param>        /// <param name="outPath"></param>        /// <param name="flag"></param>        /// <returns></returns>        public static bool ImgZip(Image iSource, string outPath, int flag)        {            ImageFormat tFormat = iSource.RawFormat;            EncoderParameters ep = new EncoderParameters();            long[] qy = new long[1];            qy[0] = flag;            EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);            ep.Param[0] = eParam;            try            {                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageDecoders();                ImageCodecInfo jpegICIinfo = null;                jpegICIinfo = arrayICI.Where(c => c.FormatDescription.Equals("JPEG")).FirstOrDefault();                if (jpegICIinfo != null)                    iSource.Save(outPath, jpegICIinfo, ep);                else                    iSource.Save(outPath, tFormat);            }            catch            {                return false;            }            iSource.Dispose();            return true;        }        /// <summary>        /// 将图片按百分比压缩，flag取值1到100，越小压缩比越大        /// </summary>        /// <param name="iSource">原图片</param>        /// <param name="flag">1-100</param>        /// <returns></returns>        public static Image ImgZip(Image iSource, int flag)        {            Image img;            MemoryStream mStream = new MemoryStream();            ImageFormat tFormat = iSource.RawFormat;            EncoderParameters ep = new EncoderParameters();            long[] qy = new long[1];            qy[0] = flag;            EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);            ep.Param[0] = eParam;            try            {                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageDecoders();                ImageCodecInfo jpegICIinfo = null;                jpegICIinfo = arrayICI.Where(c => c.FormatDescription.Equals("JPEG")).FirstOrDefault();                if (jpegICIinfo != null)                    iSource.Save(mStream, jpegICIinfo, ep);                img = Image.FromStream(mStream);                mStream.Close();            }            catch            {                return iSource;            }            iSource.Dispose();            return img;        }        /// <summary>        /// 将图片根据像素生成        /// </summary>        /// <param name="srcImage"></param>        /// <returns></returns>        public static Image SetImageSize(Image srcImage, int dWidth, int dHeight)        {            Image ob;            try            {                //按比例缩放                Size tem_size = new Size(srcImage.Width, srcImage.Height);                int sW = 0, sH = 0;                if (tem_size.Width > dHeight || tem_size.Width > dWidth)                {                    if ((tem_size.Width * dHeight) > (tem_size.Height * dWidth))                    {                        sW = dWidth;                        sH = (dWidth * tem_size.Height) / tem_size.Width;                    }                    else                    {                        sH = dHeight;                        sW = (tem_size.Width * dHeight) / tem_size.Height;                    }                }                else                {                    sW = tem_size.Width;                    sH = tem_size.Height;                }                ob = new Bitmap(dWidth, dHeight);                Graphics g = Graphics.FromImage(ob);                g.Clear(Color.WhiteSmoke);                g.CompositingQuality = CompositingQuality.HighQuality;                g.SmoothingMode = SmoothingMode.HighQuality;                g.InterpolationMode = InterpolationMode.HighQualityBicubic;                g.DrawImage(srcImage, new Rectangle((dWidth - sW) / 2, (dHeight - sH) / 2, sW, sH), 0, 0, srcImage.Width, srcImage.Height, GraphicsUnit.Pixel);                g.Dispose();            }            catch (Exception)            {                return null;            }            return ob;        }    }