private void btnXem_Click(object sender, EventArgs e)
{
SachBUS sBUS = new SachBUS();
DataTable dt = sBUS.LayDSSachTonKho((int)nudSoLuong.Value);
frmReport f = new frmReport();
f.TopLevel = false;
AddControlsToPanel(f);
f.rpvReport.LocalReport.ReportEmbeddedResource = "QuanLyCuaHangSach.rptDSSachTonKho.rdlc";
f.rpvReport.LocalReport.DataSources.Add(new ReportDataSource("dsSach", dt));
f.rpvReport.RefreshReport();
}