private void btn_update_Click(object sender, EventArgs e)
{
List <Revenue> list = new List <Revenue>();
list = Revenue.SelectallObject_WithMonthYear(cbb_months.Text, cbb_years.Text);
if (list.Count == 0)
{
Revenue re = new Revenue("", cbb_months.Text, cbb_years.Text, Double.Parse(txt_money.Text));
re.Insert();
reLoad();
}
else
{
Revenue re = new Revenue("", cbb_months.Text, cbb_years.Text, Double.Parse(txt_money.Text));
re.Update();
reLoad();
}
}