public ActionResult Create([Bind(Include = "UserId,UserName,UserPwd,RegDate")] UserInfo userInfo)
        {
            //if (ModelState.IsValid)
            //{
            //    db.UserInfo.Add(userInfo);
            //    db.SaveChanges();
            //    return RedirectToAction("Index");
            //}
            //return View(userInfo);
            try
            {
                // TODO: Add insert logic here
                db.UserInfo.Add(userInfo);
                db.SaveChanges();

                return(RedirectToAction("Index"));
            }
            catch
            {
                return(View());
            }
        }
        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public ActionResult DeleteUser(int id)
        {
            UserInfo userInfo = db.UserInfo.Where(u => u.UserId == id).FirstOrDefault();

            if (userInfo != null)
            {
                db.Entry <UserInfo>(userInfo).State = System.Data.Entity.EntityState.Deleted;
                if (db.SaveChanges() > 0)
                {
                    return(RedirectToAction("Index"));
                }
                else
                {
                    return(Content("删除失败"));
                }
            }
            else
            {
                return(Content("要删除的数据不存在"));
            }
        }