ASP.NET MVC 下拉框传值方式

在MVC中使用DropDownList接受从Controller传过来的值的方式：

控制器代码：

 public ActionResult Index()
        {
            dk.bll.edu.EduBll<dk.model.edu.SetupRecord> setUpBll = new dk.bll.edu.EduBll<dk.model.edu.SetupRecord>();
            List<dk.model.edu.SetupRecord> list = _setUpBll.GetMany(c => c.KeId == _upId && c.MenuCode == "jpjiaxiao").ToList();
            var t = new SelectList(list.Select(m => m.s2));
            ViewBag.schoolname = t;
            return View();
        }

     <div id="cmg-dialog">
        <div class="toolbar">
            <a id="icon-cmgsave">保存</a><a id="icon-cmgclose">关闭</a>
        </div>
        <form class="d-dopen" id="addfrm">
            <p>
                <span>名称：</span>
                @Html.DropDownList("schoolname", ViewBag.schoolname as IEnumerable<SelectListItem>, "请选择", new { @id = "cmg-campus" })
            </p>
            <p class="hidden">
                <span>版本号：</span>
                <input id="cmg-dnum" class="cmg-dinput" type="text" name="s2"> 
            </p>
            <p class="hidden">
                <span>是否有效：</span>
                <select id="cmg-deffect" class="cmg-dselect" type="text" name="s3">
                    <option value="">请选择</option>
                    <option>有效</option>
                    <option>无效</option>
                </select>
            </p>
            <p>
                <span></span>
                <input type="checkbox" name="s4"> 
                <input type="hidden" name="id"/>
            </p>
        </form>
    </div>

显示结果：

此种方式下控制器通过ViewBag传值，前台通过@Html.DropDownList来进行接收