Question

我在ViewBag和DropDownListFor方面遇到了一些问题。下面的代码工作正常，但我需要添加'手工'一个值为0的项目。任何想法我怎么能这样做？

public ActionResult Create()
{

            ViewBag.ParagrafyRodzic = paragrafRepository.All;

            return View();
}

@Html.DropDownListFor(model => model.ParagrafID, ((IEnumerable<Projekty03.Models.Paragraf>)ViewBag.ParagrafyRodzic)
.Select(option => new SelectListItem
{
    Text = option.ParagrafNazwa.ToString(),
    Value = option.ParagrafID.ToString(),
    Selected = (Model != null) && (option.ParagrafID == Model.ParagrafParent)
}),Translate.ChooseList)

:) Tx求助

Answer 1

我使用静态方法构建SelectList。在模型的某个地方放了类似的东西：

public static SelectList MakeSelectListDipendenze(SomeCollectionColl, bool emptyElem = true)
        {
            List<SelectListItem> Items = new List<SelectListItem>();
            if (emptyElem)
                Items.Add((new SelectListItem { Text = " ", Value = "-1" }));
            foreach (ElemInCollection Item in Coll)
            {
                SelectListItem AddMe = new SelectListItem();
                AddMe.Text = Item.Description;
                AddMe.Value = Item.Id.ToString();
                Items.Add(AddMe);
            }
            SelectList Res = new SelectList(Items, "Value", "Text");
            return Res;
        }

在你的wiew中，你可以通过

来引用它

@Html.DropDownListFor(x => x.Field, ModelClass.MakeSelectListUtenti(Model.Destinations), new { id="Destinations"})

MVC3 DropDownList和ViewBag。如何将新项目添加到集合中

1 个答案: