private void button49_Click(object sender, EventArgs e)
{
if (myCash1.listInvoiceItem.Rows.Count == 0)
{
myCash1.invoiceTotal.Rows[0][15] = "V";
UpdateInvoiceTotals();
getGui.DeleteInvoiceItemized(StaticClass.storeId, this.invoiceNum);
getGui.CloseTable(StaticClass.storeId, this.invoiceNum);
this.Dispose();
}
else
{
Alert.Show("Hủy hoặc giữ hóa đơn \ntrước khi thoát !", Color.Red);
}
}