[NullReferenceException: 並未將物件參考設定為物件的執行個體。]
Eachexam.hasSubject(String bscno) in d:\web\tinginf\App_Code\Eachexam.cs:26
exam_multi.Page_Load(Object sender, EventArgs e) in d:\web\tinginf\exam_multi.aspx.cs:30
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
System.Web.UI.Control.OnLoad(EventArgs e) +97
System.Web.UI.Control.LoadRecursive() +61
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693
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