public ActionResult AddTest()
        {
            ITestBLL testBLL = new TestManager();
            Test     test    = new Test();

            test.TestName    = Request["TestName"];
            test.TestNum     = Convert.ToInt32(Request["TestNum"]);
            test.TestEndTime = Convert.ToDateTime(Request["TestEndTime"]);
            var time = DateTime.Now.ToLocalTime();

            if (test.TestEndTime <= DateTime.Now.ToLocalTime())
            {
                return(Content("<script>alert('结束时间不能小于当前时间!');history.go(-1);</script>"));//不刷新退回页面
            }
            if (testBLL.AddEntity(test))
            {
                return(Redirect("/Home/Test"));
            }
            else
            {
                return(Content("<script>alert('添加失败!');window.location.href='/Home/AddTest';</script>"));//刷新页面
            }
        }