用体验编辑器访问页面时服务器出错？

Question

当使用经验编辑器访问页面时，页面显示正常。sc_mode=normal但当我用以下方法访问它时，我得到一个服务器错误 sc_mode=normal.

这就是错误。

Server Error in '/' Application.
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.ExperienceEditor.Utils.WebUtility.FixEmptyPlaceholders(String layout) +362
   Sitecore.ExperienceEditor.Utils.WebUtility.RenderLayout(Item item, HtmlTextWriter output, String siteName, String deviceId) +40
   Sitecore.ExperienceEditor.Speak.Ribbon.PageExtender.RibbonWebControl.DoRender(HtmlTextWriter output) +619
   Sitecore.Web.UI.WebControl.RenderAsText() +225
   Sitecore.Mvc.ExperienceEditor.Pipelines.RenderPageExtenders.SpeakRibbon.RenderPageEditorSpeakExtender.Render(TextWriter writer) +124
   Sitecore.Mvc.ExperienceEditor.Pipelines.RenderPageExtenders.RenderPageExtendersProcessor.Process(RenderPageExtendersArgs args) +62
   (Object , Object[] ) +73
   Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args) +468
   Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain) +21
   Sitecore.Mvc.Pipelines.PipelineService.RunPipeline(String pipelineName, TArgs args) +191
   Sitecore.Mvc.ExperienceEditor.PageExtenderResponseFilter.GetExtendersHtml() +157
   Sitecore.Mvc.ExperienceEditor.PageExtenderResponseFilter.get_ExtendersHtml() +30
   Sitecore.Mvc.ExperienceEditor.Pipelines.Request.RequestEnd.AddPageExtenders.Process(RequestEndArgs args) +189
   (Object , Object[] ) +73
   Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args) +468
   Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain) +21
   Sitecore.Mvc.Pipelines.PipelineService.RunPipeline(String pipelineName, TArgs args) +191
   Sitecore.Mvc.Routing.RouteHttpHandler.EndProcessRequest(IAsyncResult result) +131
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +392
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +194
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +127

什么是可能的原因？

Answer 1

这些错误是告诉你，你的渲染是没有定义占位符的，那个是导致错误的原因。