[NullReferenceException: 未将对象引用设置到对象的实例。]
ASP.<>c__DisplayClass6.<__Render__control1>b__0(String item) +288
System.Collections.Generic.List`1.ForEach(Action`1 action) +10529977
ASP.viewpoint_bookdetails_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) +519
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +268
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
System.Web.UI.Page.Render(HtmlTextWriter writer) +29
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +57
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1386
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