private void simpleButton6_Click_1(object sender, EventArgs e)
        {
            addCustomerinfo add = new addCustomerinfo();

            if (add.IsDisposed == false)
            {
                add.ShowDialog();
                dgvCustomer.DataSource = null;
                loadCustomer();
            }
        }
        private void bbiNew_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            addCustomerinfo add = new addCustomerinfo();

            add.ShowDialog();
            if (add.IsDisposed == false)
            {
                setnull();
                dgvCustomerinfo.DataSource = null;
                load();
            }
        }