正好项目用到上传+剪裁功能，发上来便于以后使用。

我不能告诉你们其实是从博客园扒的前台代码，哈哈。

前端是jquery+fineuploader+jquery.Jcrop

后台是asp.net mvc 4

核心的js调用代码是crop.js和helper文件夹下的ImgHandler.cs

效果图

前台代码

 

后台代码

        public ActionResult Index()

        {

            return View();

        }

        /// <summary>

        /// 保存缩略图

        /// </summary>

        /// <param name="form"></param>

        /// <returns></returns>

        [HttpPost]

        public ActionResult Index(FormCollection form)

        {

            int x = Convert.ToInt32(form["x"]);

            int y = Convert.ToInt32(form["y"]);

            int w = Convert.ToInt32(form["w"]);

            int h = Convert.ToInt32(form["h"]);

            string imgsrc = form["imgsrc"].Substring(0, form["imgsrc"].LastIndexOf("?"));

            string path = ImgHandler.CutAvatar(imgsrc, x, y, w, h);

            //保存Path

            

            ViewBag.Path = path;

            return View();

        }

        /// <summary>

        /// 上传头像

        /// </summary>

        /// <param name="qqfile"></param>

        /// <returns></returns>

        [HttpPost]

        public ActionResult ProcessUpload(string qqfile)

        {

            try

            {

                string uploadFolder = "/Upload/original/" + DateTime.Now.ToString("yyyyMM") + "/";

                string imgName = DateTime.Now.ToString("ddHHmmssff");

                string imgType = qqfile.Substring(qqfile.LastIndexOf("."));

                string uploadPath = "";

                uploadPath = Server.MapPath(uploadFolder);

                if (!Directory.Exists(uploadPath))

                {

                    Directory.CreateDirectory(uploadPath);

                }

                using (var inputStream = Request.InputStream)

                {

                    using (var flieStream = new FileStream(uploadPath + imgName + imgType, FileMode.Create))

                    {

                        inputStream.CopyTo(flieStream);

                    }

                }

                return Json(new { success = true, message = uploadFolder + imgName + imgType });

            }

            catch (Exception e)

            {

                return Json(new { fail = true, message = e.Message });

            }

        }