绑定DropdownlistFor与Viewbag [英] Bind DropdownlistFor with the Viewbag
问题描述
我想绑定的DropDownListFor助手与控制器中定义的viewbag。但我正在逐渐错误。
查看code: -
@ Html.DropDownListFor(型号=> model.CurrencyID,ViewBag.CurrencyList为SelectListItem))
控制器code: -
块引用>公众的ActionResult的Create()
> {
> VAR内容=由对在db.Currency
>其中,p.IsActive ==真
>排序依据p.CurrencyName
>选择新的{p.CurrencyID,p.Currency code};
>
> 。VAR X = content.ToList()选择(C =>新建SelectListItem
> {
>文本= c.Currency code,
>值= c.CurrencyID.ToString(),
>选择=(c.CurrencyID == 68)
> })了ToList()。
> ViewBag.CurrencyList = X;
>
>返回查看();
> }收到
错误: -
System.Web.Mvc.HtmlHelper'不包含定义'DropDownListFor'和最佳推广方法重载'System.Web.Mvc.Html.SelectExtensions.DropDownListFor(System.Web.Mvc.HtmlHelper,System.Linq.Ex pressions.Ex pression>,System.Collections.Generic.IEnumerable)'有一些无效参数解决方案您需要修改
@ Html.DropDownListFor(型号=> model.CurrencyID,ViewBag.CurrencyList为SelectListItem))
到
@ Html.DropDownListFor(型号=> model.CurrencyID,ViewBag.CurrencyList为IEnumerable< SelectListItem>)
I am trying to bind the DropDownListFor helper with the viewbag defined in the controller. But i am getting error.
View Code:-
@Html.DropDownListFor(model => model.CurrencyID, ViewBag.CurrencyList as SelectListItem))
Controller Code:-
public ActionResult Create() > { > var content = from p in db.Currency > where p.IsActive == true > orderby p.CurrencyName > select new { p.CurrencyID, p.CurrencyCode }; > > var x = content.ToList().Select(c => new SelectListItem > { > Text = c.CurrencyCode, > Value = c.CurrencyID.ToString(), > Selected = (c.CurrencyID == 68) > }).ToList(); > ViewBag.CurrencyList = x; > > return View(); > }
Error Received:- System.Web.Mvc.HtmlHelper' does not contain a definition for 'DropDownListFor' and the best extension method overload 'System.Web.Mvc.Html.SelectExtensions.DropDownListFor(System.Web.Mvc.HtmlHelper, System.Linq.Expressions.Expression>, System.Collections.Generic.IEnumerable)' has some invalid arguments
解决方案You need to change
@Html.DropDownListFor(model => model.CurrencyID, ViewBag.CurrencyList as SelectListItem))
to
@Html.DropDownListFor(model => model.CurrencyID, ViewBag.CurrencyList as IEnumerable<SelectListItem>)
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