c# - 尝试在 IIS 中启动网站时出错 : Value cannot be null. 参数名称:key

Question

我尝试在 IIS 中启动网站并出现此错误。我不知道是什么原因，因为这个网站是别人创建的，不是我。

堆栈跟踪:

`System.Collections.Generic.Dictionary`2.FindEntry(TKey key) +14370237
   System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value) +20
   Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.SelectionMappingRenderTraceListener.GetLiteralTraceData(LiteralControl literal, TraceData& data) +71
   Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.SelectionMappingRenderTraceListener.GetTraceData(Object renderedObject) +220
   Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.SelectionMappingRenderTraceListener.EndRendering(TextWriter writer, Object renderedObject) +47
   System.Web.UI.RenderTraceListenerList.EndRendering(TextWriter writer, Object renderedObject) +90
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +12372803
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +246
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +150
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +246
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +150
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +246
   System.Web.UI.UpdatePanel.RenderChildren(HtmlTextWriter writer) +331
   System.Web.UI.UpdatePanel.Render(HtmlTextWriter writer) +114
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +150
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +246
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +151
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +49
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +150
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +246
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +150
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +246
   System.Web.UI.Page.Render(HtmlTextWriter writer) +40
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +150
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5363`

Answer 1

如果您的服务器控件已过时或版本较旧，PageInspector 通常会起作用。如果您使用的是外部 ASP.NET 服务器控件，请尝试升级它们。

如果解决方法适合您，那么您可以按如下方式禁用页面检查器:

<appSettings>
    <add key="PageInspector:ServerCodeMappingSupport" value="Disabled" />
</appSettings>