[RuntimeBinderException: 无法对 null 引用执行运行时绑定]
CallSite.Target(Closure , CallSite , Object ) +115
System.Dynamic.UpdateDelegates.UpdateAndExecute1(CallSite site, T0 arg0) +430
CallSite.Target(Closure , CallSite , Object ) +240
ASP.productinfo_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in d:\wwwroot\hightopmachinery\m\productinfo.aspx:6
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +270
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +14
System.Web.UI.Page.Render(HtmlTextWriter writer) +30
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +67
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +101
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +27
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1342
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