private void btnNhap_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { frmPhieuNhap PN = null; if (PN == null || PN.IsDisposed) { PN = new frmPhieuNhap(); } PN.ShowDialog(); }
private void barButtonItem5_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { Form frm = this.checkExist(typeof(frmPhieuNhap)); if (frm != null) { frm.Activate(); } else { frmPhieuNhap f = new frmPhieuNhap(); f.MdiParent = this; f.Show(); } }