Question

问题在这里发生：

@Html.DropDownList("KategoriId", null, htmlAttributes: new { @class = "form-control" })

这是我的控制器：

public ActionResult Create()
{
     ViewBag.KategoriId = new SelectList(db.Kategoris, "KategoriId", "KategoriAdi");
     return View();
}

这是我的观点：

@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
   @Html.LabelFor(model => model.KategoriId, "KategoriId", htmlAttributes: new { @class = "control-label col-md-2" })
   <div class="col-md-10">
      @Html.DropDownList("KategoriId", null, htmlAttributes: new { @class = "form-control" })
      @Html.ValidationMessageFor(model => model.KategoriId, "", new { @class = "text-danger" })
   </div>
</div>

Answer 1

编写您的@Html.DropDownList()如下：

@Html.DropDownList("KategoriId", ViewBag.KategoriId as SelectList,"Select Ketegory Id", htmlAttributes: new { @class = "form-control" })

这应该可以解决您的问题！

Answer 2

您可以在CSHTML中将ViewBag类型转换为IEnumerable<SelectListItem>：

CSHTML代码：

@Html.DropDownList("your_key", (IEnumerable<SelectListItem>)ViewBag.KategoriId, "--Select Any--", new { @class = "form-control"})

控制器代码：

IList<SelectListItem> items = new List<SelectListItem>();
foreach (var item in db.Kategoris.ToList())
{
  SelectListItem sellist = new SelectListItem();
  sellist.Value = item.code.ToString();
  sellist.Text = item.name;
  items.Add(sellist);
}
ViewBag.KategoriId = items; // at the end this item should be list of `SelectListItem`

没有类型为'IEnumerable <selectlistitem>'@ Html.DropDownList的ViewData项

2 个答案: