System.IO.PathTooLongException: 指定的路径或文件名太长，或者两者都太长。完全限定文件名必须少于 260 个字符，并且目录名必须少于 248 个字符。
   在 System.IO.PathHelper.GetFullPathName()
   在 System.IO.Path.LegacyNormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths)
   在 System.IO.Path.GetFullPathInternal(String path)
   在 System.Security.Util.StringExpressionSet.CanonicalizePath(String path, Boolean needFullPath)
   在 System.Security.Util.StringExpressionSet.CreateListFromExpressions(String[] str, Boolean needFullPath)
   在 System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, AccessControlActions control, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList)
   在 System.Security.Permissions.FileIOPermission..ctor(FileIOPermissionAccess access, String path)
   在 System.Web.InternalSecurityPermissions.PathDiscovery(String path)
   在 System.Web.HttpRequest.MapPath(VirtualPath virtualPath, VirtualPath baseVirtualDir, Boolean allowCrossAppMapping)
   在 System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage)
   在 System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm)
   在 System.Web.Mvc.Html.ChildActionExtensions.ActionHelper(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues, TextWriter textWriter)
   在 System.Web.Mvc.Html.ChildActionExtensions.Action(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues)
   在 Our.Umbraco.DocTypeGridEditor.Web.Extensions.HtmlHelperExtensions.RenderDocTypeGridEditorItem(HtmlHelper helper, IPublishedContent content, String editorAlias, String viewPath, String previewViewPath, Boolean isPreview)
   在 ASP._Page_app_plugins_doctypegrideditor_render_doctypegrideditor_cshtml.Execute() 位置 D:\home\site\wwwroot\app_plugins\doctypegrideditor\render\doctypegrideditor.cshtml:行号 28
   在 System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   在 System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   在 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   在 Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer)
   在 System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData)
   在 ASP._Page_Views_Partials_grid_editors_base_cshtml.Execute() 位置 D:\home\site\wwwroot\Views\Partials\grid\editors\base.cshtml:行号 20