// GET: /Admin/AddArticle
        public ActionResult AddArticle()
        {
            ViewBag.AddDate = DateTime.Now;
            ViewBag.FenleiID = new SelectList(db.Fenleis, "FenleiID", "FenleiName");
            return View();
        }
        [HttpPost]
        [ValidateInput(false)]
        public ActionResult AddArticle(Article newArticle, HttpPostedFileBase image)
        {
            ViewBag.htmltext = new MvcHtmlString("Content");
            ViewBag.AddDate = DateTime.Now;
            int articleid = db.SaveChanges();
            if (ModelState.IsValid)
            {
                //这是标题图片上传方法
                if (image != null)
                {
                    string year = DateTime.Now.Year.ToString();
                    string month = DateTime.Now.Month.ToString("00");
                    string day = DateTime.Now.Day.ToString("00");

                    string fileFolder = string.Concat("Upload/", year, "/", month, "/", day);
                    string path = HostingEnvironment.MapPath("~/" + fileFolder);

                    if (!Directory.Exists(path))
                    {
                        //在Upload目录下创建了一个文件夹   
                        Directory.CreateDirectory(path);
                    }
                    string imagename = image.FileName;
                    string fileType = Path.GetExtension(image.FileName).ToLower();
                    if (fileType == ".jpeg" || fileType == ".jpg" || fileType == ".png" || fileType == ".gif")
                    {
                        Random ran = new Random();
                        string name = DateTime.Now.ToString("yyyyMMdhhmmss") + ran.Next(9999) + fileType;
                        image.SaveAs(Path.Combine(path, name));
                        string imageurl = string.Concat(HostingEnvironment.ApplicationVirtualPath, fileFolder, "/", name);
                        newArticle.ImageUrl = imageurl;
                    }
                }
                //这是文件上传方法
                foreach(string upload in Request.Files)
                {
                    if (Request.Files[upload].ContentLength<=0) continue;
                        string year = DateTime.Now.Year.ToString();
                        string month = DateTime.Now.Month.ToString("00");
                        string day = DateTime.Now.Day.ToString("00");
                        string fileFolder = string.Concat("Upload/", year, "/", month, "/", day);
                        string path = HostingEnvironment.MapPath("~/" + fileFolder);

                        if (!Directory.Exists(path))
                        {
                            //在Upload目录下创建了一个文件夹   
                            Directory.CreateDirectory(path);
                        }
                        string filename = Request.Files[upload].FileName;

                        string fileType = Path.GetExtension(Request.Files[upload].FileName).ToLower();
                        string nickName = Path.GetFileName(Request.Files[upload].FileName);
                        Random ran = new Random();
                        string name = DateTime.Now.ToString("YYyyMMdhhmmss") + ran.Next(9999) + fileType;
                        Request.Files[upload].SaveAs(Path.Combine(path, name));
                        AddTempAttachment(nickName, "/" + fileFolder + "/" + name, Convert.ToInt32(Session["userid"]));
                }

                db.Articles.Add(newArticle);
                db.SaveChanges();
                //将博文的id转换为字符串
                if (Request.Files != null)
                {