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好的....所以我点击仪表板上的“用户”导航到

Orchard.Web/Modules/Orchard.Users/Views/Admin/index.cshtml

引发错误：

Value cannot be null or empty.

Parameter name: linkText with the @Html.ActionLink(entry.User.UserName, "Edit", new { entry.User.Id })

通过调试并entry.user.Username返回null。我试过用普通用户和管理员登录....不知道为什么或什么时候开始发生这种情况，上次我尝试用户页面正在工作....有人知道为什么吗？

Stack:

    at System.Web.Mvc.Html.LinkExtensions.ActionLink(HtmlHelper htmlHelper, String linkText, String actionName, String controllerName, RouteValueDictionary routeValues, IDictionary`2 htmlAttributes)
   at System.Web.Mvc.Html.LinkExtensions.ActionLink(HtmlHelper htmlHelper, String linkText, String actionName, Object routeValues)
   at ASP._Page_Modules_Orchard_Users_Views_admin_Index_cshtml.Execute() in c:\WORK\BoireannSVN\trunk\VS\Orchard1.6.1\Orchard.Source\src\Orchard.Web\Modules\Orchard.Users\Views\Admin\Index.cshtml:line 65
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance)
   at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
   at Orchard.Mvc.ViewEngines.ThemeAwareness.LayoutAwareViewEngine.<>c__DisplayClass7.<FindView>b__5(ViewContext viewContext, TextWriter writer, IViewDataContainer viewDataContainer) in C:\WORK\BoireannSVN\trunk\VS\Orchard1.6.1\Orchard.Source\src\Orchard\Mvc\ViewEngines\ThemeAwareness\LayoutAwareViewEngine.cs:line 59
   at Orchard.Mvc.ViewEngines.ThemeAwareness.LayoutAwareViewEngine.LayoutView.Render(ViewContext viewContext, TextWriter writer) in C:\WORK\BoireannSVN\trunk\VS\Orchard1.6.1\Orchard.Source\src\Orchard\Mvc\ViewEngines\ThemeAwareness\LayoutAwareViewEngine.cs:line 90
   at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
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