前台页面:

@Html.DropDownList("selected", ViewData["department"] as IEnumerable
     
      , new { title = "二级部门名称", id = "deptLevel2" })
     

后台页面：

BenefitProDivide benefitProDivideInfo = BenefitProDivideServiceAction.GetOneBenefitProById(id);            ViewData.Model = benefitProDivideInfo;            //获取部门信息            PageInfo pageInfo = null;            Dictionary
     
       dicParam = new Dictionary
      
       ();            dicParam.Add("DeleteFlag", 0);            dicParam.Add("DeptLevel", 2);            dicParam.Add("ParentDeptCode", "50002995");            IList
       
         ListDepartment = DepartmentServiceAction.GetListDepartment(dicParam, ref pageInfo);            List
        
          list = new List
         
          ();            foreach (var item in ListDepartment)            {                list.Add(new SelectListItem()                {                    Text = item.Name,                    Value = item.Code                });            }            ViewData["department"] = list;             ViewData["selected"] = benefitProDivideInfo.DeptLevel2Code;  //selected为前台页面中，第一个参数，也是默认要选中的项            return View("EditBenefitProDivide");