如何获取DropDownList的选定项?
@using (Html.BeginForm("Doctors", "User", FormMethod.Get))
{
<input name="pageNumber" type="hidden" value="1" /><text>Hospital:</text><br />
@Html.DropDownList("HospitalId", (IEnumerable<SelectListItem>)ViewBag.HospitalList, new { style = "width:90%" }) <br />
<button type="submit" class="btn btn-mini"> Search </button>
}
答案 0 :(得分:0)
这个问题不清楚你想要获取下拉列表项的时间/地点。
我想你现在想要在控制器中拿起它。你需要做的是确保它包含在你的帖子中给控制器,并在表单读取服务器端时使用正确的名称。
以下是一个例子:
@Html.DropDownList("SubworkType", "Select Work Item", new { @Id = "SubworkId" , @Name = "SubworkId" })
如果您想在视图侧抓取所选值,可以执行以下操作:
var workerType = $("#WorkerTypeFilter option:selected").val()
答案 1 :(得分:0)
它应该只是作为Controller的动作方法中的参数来访问。
public ActionResult Doctors(string pageNumber, string HospitalId)
{
// make use of HospitalId
...
}
答案 2 :(得分:0)
我希望避免使用ViewBag
/ ViewData
之类的动态变量,并坚持使用强类型。
使用ViewModel
public class AssignDoctorViewModel
{
//Other Properties also
public IEnumerable<SelectListItem> Hospitals { set;get;}
public int SelectedHospital { set;get;}
}
在我的GET
Action方法中,我将使用填充的属性
public ActionResult AssignDoctor
{
var vm=new AssignDoctorViewModel();
vm.Hospitals= new[]
{
new SelectListItem { Value = "1", Text = "Florance" },
new SelectListItem { Value = "2", Text = "Spark" },
new SelectListItem { Value = "3", Text = "Henry Ford" },
};
// can replace the above line with loading data from Data access layer.
return View(vm);
}
现在在您的视图中,我们的ViewModel类是强类型的
@model AssignDoctorViewModel
@using(Html.BeginForm())
{
@Html.DropDownListFor(x => x.SelectedHospital, Model.Hospitals, "Select..")
<input type="submit" value="save" />
}
现在,在您的HTTPPOST
操作方法中,您可以通过访问SelectedHospital
属性
public ActionResult AssignDoctor(AssignDoctorViewModel model)
{
//check for model.SelectedHospital value
}
答案 3 :(得分:0)
Shyju的答案很好,我只想扩展一下Shyju所说的内容。
每个视图使用一个视图模型,只包含您需要的数据,任何未使用的数据请删除。
您的域名模型可能如下所示:
public class Hospital
{
public int Id { get; set; }
public string Name { get; set; }
}
您的视图模型可能如下所示:
public class DoctorHospitalViewModel
{
public int HospitalId { get; set; }
public IEnumerable<Hospital> Hospitals { get; set; }
}
您的视图可能如下所示(我将下拉列表放在表中以供显示):
<table>
<tr>
<td class="edit-label">Hospital <span class="required">**</span></td>
<td>
@Html.DropDownListFor(
x => x.HospitalId,
new SelectList(Model.Hospital, "Id", "Name", Model.HospitalId),
"-- Select --"
)
@Html.ValidationMessageFor(x => x.HospitalId)
</td>
</tr>
</table>
您的控制器可能如下所示,并假设您要在创建视图中使用此下拉列表:
public class HospitalController : Controller
{
private readonly IHospitalRepository hospitalRepository;
public HospitalController(IHospitalRepository hospitalRepository)
{
// Check that hospitalRepository is not null
this.hospitalRepository = hospitalRepository;
}
public ActionResult Create()
{
DoctorHospitalViewModel viewModel = new DoctorHospitalViewModel
{
Hospitals = hospitalRepository.GetAll()
};
return View(viewModel);
}
[HttpPost]
public ActionResult Create(DoctorHospitalViewModel viewModel)
{
// Check that viewModel is not null
if (!ModelState.IsValid)
{
viewModel.Hospitals = hospitalRepository.GetAll();
return View(viewModel);
}
// Do what ever needs to be done
// You can get the selected hospital id like this
int selectedHospitalId = viewModel.HospitalId;
return RedirectToAction("List");
}
}
我希望这会有所帮助。