[Exception: Exception of type 'System.Exception' was thrown.]
clsConnection.openConnect() in d:\WEB\Client_Dang\THUVIEN\App_Code\clsConnection.cs:45
clsConnection.GetDataSet(String sql) in d:\WEB\Client_Dang\THUVIEN\App_Code\clsConnection.cs:102
_Default.Page_Load(Object sender, EventArgs e) in d:\WEB\Client_Dang\THUVIEN\Default.aspx.cs:25
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +42
System.Web.UI.Control.OnLoad(EventArgs e) +132
System.Web.UI.Control.LoadRecursive() +66
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2428
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