Html.DropDownListFor的用法总结

1 //处理State，将IEnumerable<State>集合转换为IEnumerable<SelectListItem>集合
2 public IEnumerable<SelectListItem> GetStates()
3 {
4         return _usStateService.GetStates().OrderBy(c => c.StateAbbreviation).Select(state => new SelectListItem
5                                                                {
6                                                                    Text = state.StateAbbreviation,
7                                                                    Value = state.StateAbbreviation
8                                                                });
9 }

1 public class EricSunModel
2 {
3     public string ReadyTimeHour { get; set; }
4 }

 1 public ActionResult EricSunAction()
 2 {
 3     EricSunModel esModel = new EricSunModel();
 4     esModel.ReadyTimeHour = "00";
 5 
 6     GenerateReadyTimeViewData();
 7 
 8     return View(esModel);
 9 }
10 
11 private void GenerateReadyTimeViewData()
12 {
13     ViewData["HourList"] = GetTimeHourList();
14 }
15 
16 //这里要对集合进行处理，因为第二个参数必须是IEnumerable<SelectListItem> 类型的集合
17 private List<SelectListItem> GetTimeHourList()
18 {
19     List<SelectListItem> hourList = new List<SelectListItem>();
20 
21     for (int i = 0; i < 24; i++)
22     {
23         if (i < 10)
24         {
25             hourList.Add(new SelectListItem { Text = "0" + i.ToString(), Value = "0" + i.ToString() });
26         }
27         else
28         {
29             hourList.Add(new SelectListItem { Text = i.ToString(), Value = i.ToString() });
30         }
31     }
32 
33     return hourList;
34 }

1 @Html.DropDownListFor(m => m.ReadyTimeHour, ViewData["HourList"] as List<SelectListItem>)

1 @Html.DropDownListFor(m => m.ReadyTimeHour, ViewData["HourList"] as List<SelectListItem>, "---Select---")