[InvalidOperationException: 可为空的对象必须具有一个值。]
System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +51
System.Nullable`1.get_Value() +1675729
Ynit.Web.arc_news.Page_Load(Object sender, EventArgs e) in E:\net_work\ynsjlzx\Web\arc_news.aspx.cs:80
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
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