[NullReferenceException: 並未將物件參考設定為物件的執行個體。]
teacher.SetPage() in c:\inetpub\wwwroot\CSIM\teacher.aspx.cs:60
teacher.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\CSIM\teacher.aspx.cs:17
System.Web.UI.Control.OnLoad(EventArgs e) +108
System.Web.UI.Control.LoadRecursive() +90
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1607
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