Html.DropDownList_html/css

 List Countyitems = new List() { //new SelectListItem(){Text="--请选择--", Value="",Selected = false}, new SelectListItem(){Text="钦北区", Value="0",Selected = true}, new SelectListItem(){Text="钦南区", Value="1",Selected = false}, new SelectListItem(){Text="灵山县", Value="2",Selected = false}, new SelectListItem(){Text="浦北县", Value="3",Selected = false}, }; List Cityitems = new List() { //new SelectListItem(){Text="--请选择--", Value="",Selected = false}, new SelectListItem(){Text="钦州市", Value="0",Selected = true} }; List Provinceitems = new List() { //new SelectListItem(){Text="--请选择--", Value="",Selected = false}, new SelectListItem(){Text="广西省", Value="0",Selected = true} }; SelectList CountyList = new SelectList(Countyitems, "Value", "Text", 0); SelectList CityList = new SelectList(Cityitems, "Value", "Text", 0); SelectList ProvinceList = new SelectList(Provinceitems, "Value", "Text", 0); ViewData["County"] = CountyList; ViewData["City"] = CityList; ViewData["Province"] = ProvinceList;

 @Html.LabelFor(m => m.Province)  @Html.DropDownList("Province", ViewData["Province"] as SelectList, new { style = "width:153px" }) @Html.ValidationMessageFor(m => m.Province)     @Html.LabelFor(m => m.City)  @*@Html.TextBoxFor(m => m.City)*@ @Html.DropDownList("City", ViewData["City"] as SelectList, new { style = "width:153px" }) @Html.ValidationMessageFor(m => m.City)    @Html.LabelFor(m => m.County)  @*@Html.TextBoxFor(m => m.County)*@ @Html.DropDownList("County", ViewData["County"] as SelectList, new { style = "width:153px" }) @Html.ValidationMessageFor(m => m.County)