asp.net mvc下拉框Html.DropDownList 和DropDownListFor的常用方法

  一、非强类型:

  Controller:

  ViewData["AreId"] = from a in rp.GetArea()

  select new SelectListItem {

  Text=a.AreaName,

  Value=a.AreaId.ToString()

  };

  View:

  @Html.DropDownList("AreId")

  还可以给其加上一个默认选项:@Html.DropDownList("AreId", "请选择");

  二、强类型:

  DropDownListFor常用的是两个参数的重载,第一参数是生成的select的名称,第二个参数是数据,用于将绑定数据源至DropDownListFor

  Modle:

  public class SettingsViewModel

  {

  Repository rp =new Repository();

  public string ListName { get; set; }

  public IEnumerable GetSelectList()

  {

  var selectList = rp.GetArea().Select(a => new SelectListItem {

  Text=a.AreaName,

  Value=a.AreaId.ToString()

  });

  return selectList;

  }

  }

  Controller:

  public ActionResult Index()

  {

  return View(new SettingsViewModel());

  }

  View:

  @model Mvc3Applicationtest2.Models.SettingsViewModel

  @Html.DropDownListFor(m=>m.ListName,Model.GetSelectList(),"请选择")

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