public ActionResult Delete(int ID)
        {
            int tag = 0;

            gensysEntities gensysdb     = new gensysEntities();
            sys_link       configdelete = new sys_link()
            {
                id = ID
            };

            gensysdb.sys_link.Attach(configdelete);
            gensysdb.sys_link.Remove(configdelete);

            gensysdb.SaveChanges();

            string stralterSQL = @"ALTER TABLE `sys_link` DROP `id`; 
                                    ALTER TABLE `sys_link` ADD `id` int NOT NULL FIRST;
                                    ALTER TABLE `sys_link` MODIFY COLUMN `id` int NOT NULL AUTO_INCREMENT,ADD PRIMARY KEY(id);";

            //重新使数据库的id连续
            gensysdb.Database.ExecuteSqlCommand(stralterSQL);

            tag = 1; /*操作完成之后,传参到前端,前端得到了就刷新页面*/
            //return Response.Redirect("Index");
            //return RedirectToRoute(new { controller="Home" ,action="Index"});
            //return Index();
            //return RedirectToAction("Index");
            return(Content(tag.ToString()));
        }
        public ActionResult Add(FormCollection formcollection)
        {
            string site = formcollection["Site"];

            System.DateTime time = new DateTime();
            time = DateTime.Now;


            /*属性剩余id ip 文件名三个属性,id自增 ip和文件名读取文件*/

            if (site != "") //后续加入联动规则文件不为空
            {
                gensysEntities gensysdb  = new gensysEntities();
                sys_link       configadd = new sys_link();

                configadd.site        = site;
                configadd.update_time = time;

                gensysdb.sys_link.Add(configadd);

                gensysdb.SaveChanges();
            }
            else
            {
                ViewBag.SubmitForm = "输入数据有误";
                var script = String.Format("<script>alert('输入数据有误!');location.href='{0}'</script>", Url.Action("Index", "LinkageConfig"));
                //Url.Action()用于指定跳转的路径
                return(Content(script, "text/html"));
            }


            //List<sys_user> list = gensysdb.sys_link.ToList();


            //return Json(newproduct.ToList(), JsonRequestBehavior.AllowGet);
            return(RedirectToAction("Index"));
        }