private void btnThemSach_ItemClick(object sender, ItemClickEventArgs e) { Form frm = formCheck(typeof(frmQuanLySach)); if (frm == null) { frmQuanLySach f = new frmQuanLySach(); f.MdiParent = this; f.Show(); } else { frm.Activate(); } }
/********************************************* ********************************************* * Tab 1: Sách ********************************************* *********************************************/ private void btnSach_Them_Click(object sender, EventArgs e) { frmQuanLySach frmQLSach = new frmQuanLySach(); frmQLSach.ShowDialog(); }