实现图像剪裁 jquery.Jcrop

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配合 jquery.Jcrop 实现上传图片进行剪裁保存功能

    <script src="js/jquery.min.js"></script>    <script src="js/jquery.Jcrop.js"></script>    <link rel="stylesheet" href="css/jquery.Jcrop.css" type="text/css" />    <script type="text/javascript">        jQuery(function ($) {            //target是<img>的id            jQuery('#target').Jcrop({                onChange: showCoords,                onSelect: showCoords            });        });        function showCoords(c) {            jQuery('#x').val(c.x); //x起点坐标            jQuery('#y').val(c.y);            jQuery('#x2').val(c.x2);//x终点坐标            jQuery('#y2').val(c.y2);            jQuery('#w').val(c.w);            jQuery('#h').val(c.h);        };    </script>

后台代码

        /// <summary>        /// 剪裁图像        /// </summary>        /// <param name="Img">原图物理地址</param>        /// <param name="Width">新图宽度</param>        /// <param name="Height">新图高度</param>        /// <param name="X">绘制起点X轴</param>        /// <param name="Y">绘制起点Y轴</param>        /// <returns></returns>        private byte[] Crop(string Img, int Width, int Height, int X, int Y)        {            try            {                using (var OriginalImage = new Bitmap(Img))                {                    using (var bmp = new Bitmap(Width, Height, OriginalImage.PixelFormat))                    {                        bmp.SetResolution(OriginalImage.HorizontalResolution, OriginalImage.VerticalResolution);                        using (Graphics Graphic = Graphics.FromImage(bmp))                        {                            Graphic.SmoothingMode = SmoothingMode.AntiAlias;//设置高质量，低速度呈现平滑程度                            Graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;//设置高质量插值法                            Graphic.Clear(Color.Transparent);//清空画布并以透明背景色填充                            Graphic.PixelOffsetMode = PixelOffsetMode.HighQuality;                            Graphic.DrawImage(OriginalImage, new Rectangle(0, 0, Width, Height), X, Y, Width, Height,                                              GraphicsUnit.Pixel);                          方法一                            bmp.Save(Server.MapPath("上传裁剪") + "new.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);//图片另存                          方法二  //转换二进制流                            var ms = new MemoryStream();                            bmp.Save(ms, OriginalImage.RawFormat);                            return ms.GetBuffer();                        }                    }                }            }            catch (Exception Ex)            {                throw (Ex);            }        }

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