private void OnAdd()
        {
            dlgAddNhatKyKienHeCongTy dlg = new dlgAddNhatKyKienHeCongTy();

            if (dlg.ShowDialog(this) == DialogResult.OK)
            {
                DisplayAsThread();
            }
        }
        private void OnEdit()
        {
            if (dgNhatKyLienHeCongTy.SelectedRows == null || dgNhatKyLienHeCongTy.SelectedRows.Count <= 0)
            {
                MsgBox.Show(Application.ProductName, "Vui lòng chọn 1 nhật ký liên hệ.", IconType.Information);
                return;
            }

            DataRow drNhatKyLienHeCongTy = (dgNhatKyLienHeCongTy.SelectedRows[0].DataBoundItem as DataRowView).Row;
            dlgAddNhatKyKienHeCongTy dlg = new dlgAddNhatKyKienHeCongTy(drNhatKyLienHeCongTy);

            if (dlg.ShowDialog(this) == DialogResult.OK)
            {
                DisplayAsThread();
            }
        }