Nop：执行处理程序'System.Web.Mvc.HttpHandlerUtil + ServerExecuteHttpHandlerAsyncWrapper'的子请求时出错

Question

我正在尝试编写插件。我开始测试是否可以在索引页面上显示内容。这是我的代码：

//My main plugin class
public IList<string> GetWidgetZones()
{
  return new List<string>{ "home_page_before_news" };
}

//My action
[ChildActionOnly]
public ActionResult DisplayLink(string widgetZone, object additionalData = null)
{
   _cacheService.Clear();
   return View("~/Plugins/Widgets.PartnershipManager/Views/DisplayLink.cshtml");
}

//My view
@{ 
   Layout = "";
}

<a href="#">My first link</a>

我收到以下错误：执行处理程序'System.Web.Mvc.HttpHandlerUtil + ServerExecuteHttpHandlerAsyncWrapper'的子请求时出错。

没有进一步的信息。然而，我尽可能多地匹配NivoSlider的代码。我错过了什么吗？

感谢您的帮助

修改

以下是 GetConfigurationRoute 和 GetDisplayWidgetRoute 方法：

public void GetConfigurationRoute(out string actionName, 
            out string controllerName, 
            out RouteValueDictionary routeValues)
{
   actionName = "Configure";
   controllerName = "PartnershipManager";
   routeValues = new RouteValueDictionary()
   {
     { "Namespaces", "Nop.Plugin.Widget.PartnershipManager.Controllers" },
     { "area", null }
   };
}

 public void GetDisplayWidgetRoute(string widgetZone, 
        out string actionName, out string controllerName, 
        out RouteValueDictionary routeValues)
 {
    actionName = "DisplayLink";
    controllerName = "PartnershipManager";
    routeValues = new RouteValueDictionary()
    {
      { "Namespaces", "Nop.Plugin.Widget.PartnershipManager.Controllers" },
      { "area", null },
      { "widgetZone", widgetZone}
    };
  }

发生错误的地方

public static MvcHtmlString Widget(this HtmlHelper helper, 
       string widgetZone, object additionalData = null, string area = null)
{
        return helper.Action("WidgetsByZone", "Widget", 
                      new { widgetZone = widgetZone, 
                      additionalData = additionalData, area = area });
}