private void btnBanHang_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { frmBanHang bh = new frmBanHang(); if (ExistsForm(bh)) { return; } bh.MdiParent = this; bh.Show(); }
private void btnBanHang_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { Form form = IsActive12(typeof(QuanLy_DienThoai.Views.frmBanHang)); if (form == null) { frmBanHang Child = new frmBanHang(lbltendangnhap.Caption); Child.MdiParent = this; Child.Show(); } else { form.Activate(); } }