public void addIncomeExpenditure(bool expenditure)
        {
            f_AddVagyon f_vagy = new f_AddVagyon()
            {
                sqlc        = sqlc,
                edit        = false,
                customer_id = customer_id,
                expenditure = expenditure
            };

            f_vagy.ShowDialog();

            if (f_vagy.OK)
            {
                fillCustomerVagyon(c_DBHandler.getCustomerAllData(sqlc, customer_id).cust_1_vagyon);
            }
        }
        public void editIncomeExpenditure(bool expenditure)
        {
            if ((!expenditure && lv_CustomerIncome.FocusedItem != null) ||
                (expenditure && lv_CustomerExpenditure.FocusedItem != null))
            {
                f_AddVagyon f_vagy = new f_AddVagyon()
                {
                    sqlc        = sqlc,
                    edit        = true,
                    id          = expenditure ? Convert.ToInt32(lv_CustomerExpenditure.FocusedItem.Tag) : Convert.ToInt32(lv_CustomerIncome.FocusedItem.Tag),
                    customer_id = customer_id,
                    expenditure = expenditure
                };

                f_vagy.ShowDialog();

                if (f_vagy.OK)
                {
                    fillCustomerVagyon(c_DBHandler.getCustomerAllData(sqlc, customer_id).cust_1_vagyon);
                }
            }
        }