Html.PagedListPager 上的 System.Web.Mvc.HtmlHelper<dynamic> 异常

Question

当我尝试使用我的 aspx 文件时

 @using PagedList.Mvc;
 ...
 @Html.PagedListPager(ViewBag.test, page => Url.Action("Test", new { page })).

我会收到此错误消息

'System.Web.Mvc.HtmlHelper<dynamic>' has no applicable method named 'PagedListPager' but appears to have an extension method by that name. Extension methods cannot be dynamically dispatched. Consider casting the dynamic arguments or calling the extension method without the extension method syntax.

我的 .cs 文件的代码如下所示

    using PagedList;
    private List<Quality> Qualitys()
    {
        List<Quality> Qualitys = new List<Quality>()
        {
            new Quality(){ID=1,Name="All Qualitys"},
            new Quality(){ID=2,Name="1"},
            new Quality(){ID=3,Name="2"},
            new Quality(){ID=4,Name="3"},
            new Quality(){ID=5,Name="4"},
            new Quality(){ID=6,Name="5"}
        };

        return Qualitys;
    }

    public ActionResult Test(int? page)
    {
        int pageSize = 3;
        int pageNumber = page ?? 1;

        ViewBag.test = Qualitys().ToPagedList(pageNumber, pageSize);
        return View();
    }

在我的 ~Views/Web.config 文件中，我会在那里。

  <namespaces>
    <add namespace="System.Web.Mvc" />
    <add namespace="System.Web.Mvc.Ajax" />
    <add namespace="System.Web.Mvc.Html" />
    <add namespace="System.Web.Optimization"/>
    <add namespace="System.Web.Routing" />
    <add namespace="Web" />
  </namespaces>

我不明白为什么会出现此错误，请帮忙。

Answer 1

您需要将动态属性（在本例中为 ViewBag.test）转换为所需的类型。应该是

@Html.PagedListPager((IPagedList)ViewBag.test, page => Url.Action("Test", new { page }))