一、前端cshtml代码

                添加附件：                @using (Html.BeginForm("FileUp", "Detail", FormMethod.Post, new { enctype = "multipart/form-data", id = "formFileUpload" }))                {                                                                                                                                                                                                                    }                                     

二、JS代码

(function () {    var replyJs = replyJs || {};    replyJs.unitls = (function () {        var controller = '/RenosData.Fax.Web/Detail';        var homeController = '/RenosData.Fax.Web/Home';        //传真回复        var replyFax = function () {            //浏览附件            $("#btnSee").bind("click", function (e) {                $("#uploadFile").click();            });            //上传附件            $("#uploadFile").bind("change", function (e) {                $("#filePath").val($("#uploadFile").val());            });            $("#btnUploadFile").click(function () {                addAttachment();                return false;            });            //删除传真附件            $("#btnDelAttach").live("click",function () {                $.ajax({                    url: controller + '/DelAttachment',                    type: 'post',                    //dataType: 'json',                    data: "{file:'" + $(this).attr("filename") + "'}",                    contentType: 'application/json; charset=utf-8',                    success: function (data) {                        if (data.status == "success") {                            $("#attachMents").empty();                        } else {                            alert(data.message);                        }                    },                    error: function (err) {                        alert(err.toString());                    }                });            });            //发送传真            $("#btnSendFax").click(function () {                addFaxToDb("send");            });         };        //上传附件        var addAttachment = function () {            if (!$("#filePath").val()) {                alert("请选择需要上传的文件!");                return;            }             //function showRequest(formData, jqForm, options) {
                //    //alert('发送前');             //    return true;            //}             //function showResponse(responseText, statusText) {             //    //alert('发送后');             //}            //var options = {
                //    //target: '#outputdiv',            //    beforeSubmit: showRequest,            //    success: showResponse            //};            //$(this).ajaxSubmit(options);             $("#formFileUpload").ajaxSubmit({                dataType: 'json',                beforeSend: function (xhr) {                },                success: function (data) {                    if (data) {                        if (data.message == "success") {                            $("#filePath").val("");                            $("#attachMents").empty().append("已上传附件：" + data.fileOldName + "");                        } else {                            alert(data.message);                        }                    }                },                complete: function () {                }            });            return;        };        //传真状态：发送or保存                 var back = function () {            window.history.go(-1);        };        return {            replyFax: replyFax,        };    }());    $(function () {        replyJs.unitls.replyFax();    });})(jQuery);

三、Controller代码

/// 
        /// 添加附件        /// 
        /// 
             [HttpPost]        public ActionResult FileUp()        {            HttpPostedFileBase uploadFile = Request.Files[0];            var fax = new FaxModel();            if (uploadFile == null || uploadFile.ContentLength == 0)            {                 fax = new FaxModel() { Message = "请选择上传附件！", Attachment = null };                return Json(new { message = fax.Message });            }            //if (uploadFile.ContentLength > 20971520)            //{            //    fax = new FaxModel() { Message = "请上传20MB以内的附件！", Attachment = null };            //    return View("NewFax", fax);            //}             try            {                var newFileName = Guid.NewGuid() + "_" + uploadFile.FileName; ;                string attachFilePath = WebConfig.Attachment;                if (!Directory.Exists(attachFilePath))                    Directory.CreateDirectory(attachFilePath);                string filePath = Path.Combine(attachFilePath, newFileName);                uploadFile.SaveAs(filePath);                var attachment = new FileAttachmentModel()                {                    FileName = newFileName,                    FileLength = (uploadFile.ContentLength * 1.0 / 1024).ToString("0.00"),                    FilePath = filePath,                    FileOldName = uploadFile.FileName,                    FileSize = uploadFile.ContentLength                };                fax = new FaxModel() { Attachment = attachment };                ViewBag.FaxMsg = uploadFile.FileName;                return Json(new { message = "success", fileOldName = attachment.FileOldName, fileSize = attachment.FileSize, fileName = attachment.FileName });            }            catch (Exception)            {                return Json(string.Empty);            }        }

附件删除

/// 
        /// 附件删除        /// 
        ///         /// 
             [HttpPost]        public ActionResult DelAttachment(string file)        {            try            {                string attachFilePath = WebConfig.Attachment;                string filePath = Path.Combine(attachFilePath, file);                if (System.IO.File.Exists(filePath))                {                    System.IO.File.Delete(filePath);                    return Json(new { status = "success" });                }                return Json(new { status = "false", message = "附件删除失败!"  });            }            catch (Exception ex)            {                return Json(new { status = "false", message = "附件删除失败!" });            }        }