private void nBI_SDM_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
        {
            panelCha.Controls.Clear();
            ucBookIsBorrowing frm = new ucBookIsBorrowing(tdn);

            frm.Dock = System.Windows.Forms.DockStyle.Fill;
            panelCha.Controls.Add(frm);
        }
        private void bar_SachDangMuon_ItemClick(object sender, ItemClickEventArgs e)
        {
            panelCha.Controls.Clear();
            ucBookIsBorrowing frm = new ucBookIsBorrowing(tdn);

            frm.Dock = System.Windows.Forms.DockStyle.Fill;
            panelCha.Controls.Add(frm);
        }