[NullReferenceException: Object reference not set to an instance of an object.]
TestHTML.Loai_Chuyen_Muc.hienThiLoaiChuyenMuc(Int32 id) in D:\Project\2015\2015KhoaHoa\TestHTML\TestHTML\Loai-Chuyen-Muc.aspx.cs:44
TestHTML.Loai_Chuyen_Muc.Page_Load(Object sender, EventArgs e) in D:\Project\2015\2015KhoaHoa\TestHTML\TestHTML\Loai-Chuyen-Muc.aspx.cs:22
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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