private void frmThongKeSachDangMuon_Load(object sender, EventArgs e)
        {
            reportViewer1.Reset();
            DataTable dt = BUS_OBJ.loadDSPhieuMuonChuaTra();

            this.reportViewer1.RefreshReport();
            //System.IO.Stream report = new System.IO.Stream();
            //reportViewer1.LocalReport.LoadReportDefinition();
            //reportViewer1.LocalReport.ReportPath = @"D:\Project\C #\QLTV 3 tier\QLTV 3 tier\rptSachChuaTra.rdlc";
            reportViewer1.LocalReport.ReportPath = "rptSachChuaTra.rdlc";
            reportViewer1.LocalReport.DataSources.Clear();
            Microsoft.Reporting.WinForms.ReportDataSource newDataSource = new Microsoft.Reporting.WinForms.ReportDataSource("dsSachDangMuon", dt);
            reportViewer1.LocalReport.DataSources.Add(newDataSource);
            reportViewer1.RefreshReport();
        }