与往常一样,您可以从编写一个满足您描述的视图要求的视图模型开始:
public class EditDeviceViewModel
{
public IEnumerable<int> SelectedFeatures { get; set; }
public IEnumerable<SelectListItem> Features { get; set; }
public int ID { get; set; }
public string Name { get; set; }
}
然后你的控制器:
public class DeviceController : Controller
{
public ActionResult Edit(int id)
{
Device device = (go get your device from your repository using the id)
IList<Feature> features = (go get all features from your repository)
// now build the view model
var model = new EditDeviceViewModel();
model.ID = device.ID;
model.Name = device.Name;
model.SelectedFeatures = device.Features.Select(x => x.ID);
model.Features = features
.Select(x => new SelectListItem
{
Value = x.ID.ToString(),
Text = x.Name,
})
.ToList();
// pass the view model to the view
return View(model);
}
[HttpPost]
public ActionResult Edit(EditDeviceViewModel model)
{
// model.SelectedFeatures will contain the selected feature IDs here
...
}
}
最后是视图:
@model EditDeviceViewModel
@using (Html.BeginForm())
{
@Html.Html.HiddenFor(x => x.ID)
<div>
@Html.LabelFor(x => x.Name)
@Html.EditorFor(x => x.Name)
</div>
<div>
@Html.LabelFor(x => x.SelectedFeatures)
@Html.ListBoxFor(x => x.SelectedFeatures, Model.Features)
</div>
<button type="submit">Edit</button>
}