$(document).ready(function () {                     $(‘#uploadify‘).uploadify({                onUploadSuccess: function (file, returndata, response) {                    var data = http://www.mamicode.com/eval(‘(‘ + returndata + ‘)‘);                    if (response == true && data.Success == ‘true‘) {                        $("input[name=BACKIMG]").attr("value", data.FileName);//data.FileName为图片保存路径                        $(‘#mainForm‘).submit();                    } else {                        alert(data.Message);                    }                },                ‘height‘: 20,                ‘width‘: 35,                ‘uploadLimit‘: 1,                ‘queueSizeLimit‘: 1,                ‘queueID‘: ‘fileQueue‘,                              ‘removeCompleted‘: false,                ‘auto‘: false,                ‘multi‘: false,                ‘buttonText‘: ‘浏览图片‘,                ‘swf‘: ‘@Url.Content("~/Scripts/uploadify/uploadify.swf")‘,                ‘uploader‘: ‘@Url.Content("~/Scripts/uploadify/UploadAttach.ashx")‘            });

 /// <summary>    /// UploadAttach 的摘要说明    /// </summary>    public class UploadAttach : IHttpHandler    {        public void ProcessRequest(HttpContext context)        {            HttpPostedFile fileData = context.Request.Files["fileData"];            string floder = context.Request["floder"];            if (fileData != null)            {                try                {                    // 文件上传后的保存路径                    string path = "~/img/";                                      string filePath = context.Server.MapPath(path);                    if (!Directory.Exists(filePath))                    {                        Directory.CreateDirectory(filePath);                    }                    string saveFileName = Guid.NewGuid().ToString() + fileData.FileName;                                    string newFilePath = filePath + saveFileName;                    fileData.SaveAs(newFilePath);                    //图片裁切                    var thumbFilePath = newFilePath.Replace(Path.GetExtension(newFilePath),                                                            ".thumb" + Path.GetExtension(newFilePath));                    ImageKit.MakeCenterThumbnail(newFilePath, thumbFilePath, 1602, 400);                    if (File.Exists(newFilePath))                    {                        File.Delete(newFilePath);                    }                    context.Response.Write("{‘Success‘:‘true‘,‘FileName‘:‘" + saveFileName.Replace(".", ".thumb.") + "‘}");                }                catch (Exception ex)                {                    context.Response.Write("{‘Success‘:‘false‘,‘Message‘:‘"+ex.Message+"‘}");                }            }            else            {                context.Response.Write("{‘Success‘:‘false‘,‘Message‘:‘请选择要上传的文件‘}");            }        }        public bool IsReusable        {            get            {                return false;            }        }    }

 public static class ImageKit    {          public static bool MakeCenterThumbnail(string origPath, string destPath, int width, int height)        {            try            {                using (Image image = Image.FromFile(origPath))                {                    int originalWidth = image.Width;                    int originalHeight = image.Height;                    double ratio = Math.Max((originalWidth / (double)width < originalHeight / (double)height)                                        ? originalWidth / (double)width                                        : originalHeight / (double)height, 1);                    var cutSize = new Size((int)Math.Round(width * ratio, 0), (int)Math.Round(height * ratio, 0));                    int x = (int)Math.Round((double)(originalWidth - cutSize.Width) / 2, 0);                    int y = (int)Math.Round((double)(originalHeight - cutSize.Height) / 2, 0); ;                    var bitmap = new Bitmap(width, height);                    using (var graphics = Graphics.FromImage(bitmap))                    {                        graphics.CompositingQuality = CompositingQuality.HighQuality;                        graphics.SmoothingMode = SmoothingMode.HighQuality;                        graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;                        graphics.Clear(Color.White);                        var destRect = new Rectangle(0, 0, width, height);                        var originalRect = new Rectangle(x, y, cutSize.Width, cutSize.Height);                        graphics.DrawImage(image, destRect, originalRect, GraphicsUnit.Pixel);                    }                    #region wjy20131004修改                    // 以下代码为保存图片时,设置压缩质量                    EncoderParameters encoderParams = new EncoderParameters();                    long[] quality = new long[1];                    quality[0] = 100;                    EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);                    encoderParams.Param[0] = encoderParam;                    //获得包含有关内置图像编码解码器的信息的ImageCodecInfo 对象.                    ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();                    ImageCodecInfo jpegICI = null;                    for (int i = 0;i < arrayICI.Length;i++)                    {                        if (arrayICI[i].FormatDescription.Equals("JPEG"))                        {                            jpegICI = arrayICI[i];                            //设置JPEG编码                            break;                        }                    }                    if (jpegICI != null)                    {                        bitmap.Save(destPath, jpegICI, encoderParams);                    }                    //bitmap.Save(destPath);                    #endregion                }                return true;            }            catch            {                return false;            }        }    }

 function submitbut() {            var filecount = $(‘#fileQueue‘).find(‘div‘).length;            if (filecount > 0) {                $(‘#uploadify‘).uploadify(‘upload‘, ‘*‘);            } else {                $(‘#mainForm‘).submit();            }        }