[InvalidOperationException: 可为空的对象必须具有一个值。]
System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +52
System.Nullable`1.get_Value() +1893093
ASP.articlesinfo_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in f:\usr\localuser\qyw8282720001\ArticlesInfo.aspx:42
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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