Question

尝试通过视图模型填充选择列表。查看型号：

public class CountryCity
{
    public IEnumerable<SelectListItem> Countries { get; set; }
    public SelectList Cities { get; set; }
}

控制器：

public class HomeController : Controller
{
    private CountriesContext context = new CountriesContext();
    public ActionResult Index()
    {
        CountryCity cc = new CountryCity();
        var countries = from c in context.Countries
                        orderby c.Name
                        select c;
        cc.Countries = new SelectList(countries,"CountryID", "Name");
        return View(cc);
    }
}

查看：

@using CascadingDropdowns.Models.ViewModels
@model CountryCity

<h2>Index</h2>
<div>
    @using (Html.BeginForm())
    {
        @Html.DropDownList("CountryID", Model.Countries, "Please select country");
        @Html.DropDownList("City", new SelectList(string.Empty, "City", "<city>"), "Please select a city", new { @disabled = "disabled" }));
    }
</div>

这会产生错误：

C:\Users\Jakov\AppData\Local\Temp\Temporary ASP.NET Files\root\aad61407\c9799020\App_Web_index.cshtml.a8d08dba.lv9oabqd.0.cs(97,58): error CS1513: } expected

一切看起来都很好。

Answer 1

您需要删除以下行中的一个右括号：

@Html.DropDownList("City", new SelectList(string.Empty, "City", "<city>"), "Please select a city", new { @disabled = "disabled" }));

应该是

@Html.DropDownList("City", new SelectList(string.Empty, "City", "<city>"), "Please select a city", new { @disabled = "disabled" });

编译器抛出错误;生成的代码缺少括号

1 个答案: