[英]Dropdownlist from database in MVC5
ViewModel:
public class GroepModel
{
public int id { get; set; }
public String Naam { get; set; }
public String Beschrijving { get; set; }
}
控制器:
public class GroepController : Controller
{
AlinaDatabaseDataContext db = new AlinaDatabaseDataContext();
// GET: Groep
public ActionResult Groepen()
{
List<GroepModel> groepen = Mapper.Map<List<GroepenWerkvorm>, List<GroepModel>>(db.GroepenWerkvorms.ToList());
return View(groepen);
}
}
视图
@model alina1617.Models.GroepModel
@{
ViewBag.Title = "Groepen";
}
<h2>Groepen</h2>
<div>
@Html.DropDownListFor(model => model. //This is not working )
</div>
我环顾四周,发现很多东西可以使用ViewBags解决,但使用它们不是次优的吗? 那么,使用具有数据库数据的模型类来获取下拉列表的最佳方法是什么?
首先,您需要向ViewModel中添加一个SelectList:
public class MyViewModel {
public SelectList list {get;set;}
public int selectedItem {get;set;}
}
那么您需要将列表添加到SelectList中:
public class GroepController : Controller
{
AlinaDatabaseDataContext db = new AlinaDatabaseDataContext();
// GET: Groep
public ActionResult Groepen()
{
List<GroepModel> groepen = Mapper.Map<List<GroepenWerkvorm>, List<GroepModel>>(db.GroepenWerkvorms.ToList());
var model = new MyViewModel();
model.list = new SelectList(groepen, "id", "Naam");
return View(model);
}
}
并在视图中:
@model alina1617.Models.MyViewModel
@{
ViewBag.Title = "Groepen";
}
<h2>Groepen</h2>
<div>
@Html.DropDownListFor(model => model.selectedItem, Model.list )
</div>
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