@Html.Partial("_men")

<div class="col-md-10">

    <div class="row">

      @using(Ajax.BeginForm(new AjaxOptions

      {

          HttpMethod = "post",

          InsertionMode = InsertionMode.ReplaceWith,

          UpdateTargetId = "searchbm"

      }))

      {

        @Html.DropDownList("RecommName", "选择负责人")

        @Html.DropDownList("DateTime","选择毕业时间")

        @Html.DropDownList("School", "选择学校")

        @Html.DropDownList("Major", "专业")

        <input type="text"   name="Name" placeholder="请输入姓名..." />

        <input type="text"   name="Card" placeholder="请输入身份证号..."/>

        <input type="submit" value="查询" />

        <input type="button" id="down" value="下载" />

      }

    </div>

    <div class="row">

        @Html.Partial("_Searchbm", Model)

    </div>

</div>

<script >

    $(function () {

        $("#down").click(function () {

            var form = document.forms[];

            var oldaction = form.action;

            form.action = "/zsgl/down";

            form.method = "post";

            form.target = "_blank";

            form.submit();

            form.action = oldaction;

        })

    })

</script>

        public ActionResult bmman()

        {

            //1.get all studentI

            List<StudentI> si = sb.Get();

            //2.create dropselect to <select>

            ViewData["RecommName"] = si.DistinctBy(x => x.RecommName).Select(a => new SelectListItem { Text = a.RecommName, Value = a.RecommName });

            ViewData["DateTime"] = si.DistinctBy(x => x.DateTime).Select(a => new SelectListItem { Value = a.DateTime, Text = a.DateTime });

            ViewData["Major"] = si.DistinctBy(x => x.Major).Select(a => new SelectListItem { Value = a.DateTime, Text = a.DateTime });

            ViewData["School"] = si.DistinctBy(x => x.DateTime).Select(a => new SelectListItem { Value = a.DateTime, Text = a.DateTime });

            return View(si);

        }

        [HttpPost]

        public ActionResult bmman(StudentI s)

        {

            if (Request.IsAjaxRequest())

            {

                List<StudentI> si = sb.Get();

                if (s.DateTime != null)

                    si = si.Where(x => x.DateTime == s.DateTime).ToList();

                if (s.RecommName != null)

                    si = si.Where(x => x.RecommName == s.RecommName).ToList();

                if (s.Card != null)

                    si = si.Where(x => x.Card.Contains( s.Card)).ToList();

                if (s.Name != null)

                    si = si.Where(x => x.Name.Contains(s.Name)).ToList();

                return PartialView("_Searchbm", si);

            }

            return HttpNotFound();

        }