[NullReferenceException: 未将对象引用设置到对象的实例。]
System.Web.UI.WebControls.PagedDataSource.GetEnumerator() +162
System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +417
System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +67
Network.index.course.bandCourse(String class1, String class2, String class3) +8020
Network.index.course.bandSpecialty() +3369
Network.index.course.Page_Load(Object sender, EventArgs e) +126
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +24
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +41
System.Web.UI.Control.OnLoad(EventArgs e) +131
System.Web.UI.Control.LoadRecursive() +65
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2427
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