sitecore - 页面预览期间的功能区控件异常

Question

嗨，在预览期间加载页面时我没有加载功能区。
你有任何线索如何解决它吗？

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 


[NullReferenceException: Object reference not set to an instance of an object.]
   Sitecore.Data.Database.ApplySecurity(Item[] items) +112
   Sitecore.Data.Database.SelectItems(String query) +252
   Sitecore.Shell.Applications.WebEdit.Commands.OpenMyItems.GetHeader(CommandContext context, String header) +188
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.RenderSmallButton(HtmlTextWriter output, Item button, CommandContext commandContext) +307
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.RenderButton(HtmlTextWriter output, Item button, CommandContext commandContext) +732
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.RenderChunk(HtmlTextWriter output, Item chunk, CommandContext commandContext) +330
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.RenderChunk(HtmlTextWriter output, Item chunk, CommandContext commandContext, Boolean isContextual, String id) +204
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.RenderChunk(HtmlTextWriter output, Item chunk, CommandContext commandContext, Boolean isContextual) +242
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.RenderChunks(HtmlTextWriter output, Item strip, CommandContext commandContext, Boolean isContextual) +442
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.RenderStrips(HtmlTextWriter output, Item ribbon, Boolean isContextual, ListString visibleStripList) +800
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.RenderStrips(HtmlTextWriter output, Item defaultRibbon, Item contextualRibbon, ListString visibleStripList) +215
   Sitecore.Web.UI.WebControls.Ribbons.Ribbon.Render(HtmlTextWriter output) +610
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +149
   Sitecore.Web.HtmlUtil.RenderControl(Control ctl) +74
   Sitecore.Shell.Applications.WebEdit.WebEditRibbonForm.RenderRibbon(Item item) +603
   Sitecore.Shell.Applications.WebEdit.WebEditRibbonForm.OnLoad(EventArgs e) +1238

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
   System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +76
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +193
   System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) +35
   Sitecore.Web.UI.Sheer.ClientPage.OnLoad(EventArgs e) +337
   System.Web.UI.Control.LoadRecursive() +71
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3178

Answer 1

从堆栈跟踪信息看来问题出在 My Items功能区中的按钮。



似乎由于某种原因，在加载此按钮时执行的快速查询返回包含空值的项目列表。你有任何自定义数据提供者吗？

您可以尝试两种解决方案:

清除缓存 /sitecore/admin/cache.aspx页

通过以 运行此查询来查找导致问题的项目管理员

Item[] items = Sitecore.Client.ContentDatabase.SelectItems(
    "fast://*[@__lock='%\"full-username-which-experienced-exception-with-domain-name\"%']");

另一个选项是从功能区隐藏此按钮(在 core 数据库中删除或更改 /sitecore/content/Applications/WebEdit/Ribbons/WebEdit/Page Editor/Edit/My Items 的安全权限)。根据我的经验，这个按钮很少用于 Page Editor模式并且可以减慢速度 Page Editor每次加载此模式时， My items按钮计算当前用户锁定的所有文章，因此无论如何删除它可能是个好主意。