function uplond() {

            var oImg = document.getElementById("mainphoto");

            ImgUploadManger.imgView.uploadImg(location.protocol + '//' + location.host + "/", oImg.src, window.location.search, oImg.width, oImg.height);

            alert('下载成功、存放在D盘根目录下！');            

                    }

[AjaxPro.AjaxMethod]

        public void uploadImg(string _physicalApplicationPath, string _src, string _search, int _width, int _heigth)

        {

            //获取比例图的大小

            int width = _width;

            int height = _heigth;

            _src = _src.Replace(_physicalApplicationPath, "");

            //生成比例图

            Images img = new Images();

            string src = img.Thumbnail1(Server.MapPath("../") + _src, width, height);

            string filepath = src;

            string urlpath = src.Replace(Server.MapPath("../"), "");

            string filename = System.IO.Path.GetFileName(filepath);

            try

            {

             //这里是下载

                WebClient wc = new WebClient();

                wc.DownloadFile(_physicalApplicationPath + urlpath, "d:\\" + filename);

                wc.Dispose();                 

            }

            catch (Exception ex)

            {

                ClientScript.RegisterStartupScript(typeof(string), "Err", string.Format("<script language='javascript'>alert('{0}');</script>", ex.Message));

                return;

            }

            

        }