private void btnEdit_Click(object sender, EventArgs e)
        {
            if (txtId.Text == string.Empty)
            {
                MessageBox.Show("You don't choose a tollbills to " + btnEdit.Text + "!", "Infomations", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else
            {

                TollBills tb = new TollBills()
                {
                    Id = txtId.Text.Trim(),
                    Datetoll = dateTimePickerDate.Text,
                    Servicenoteid =((dgvTollBills.DataSource as DataTable).Rows[dgvTollBills.CurrentCell.RowIndex] as DataRow).Field<string>("SERVICENOTEID"),
                    DiscountMoney = decimal.Parse(txtDiscountMoney.Text.Trim() == "" ? "0" : txtDiscountMoney.Text.Trim()),
                    Note = txtNote.Text,
                    Total = decimal.Parse(txtTotal.Text.Trim() == "" ? "0" : txtTotal.Text.Trim())
                };

                TollBillEdit serviceNoteEdit = new TollBillEdit(tb, txtContractId.Text.Trim(), (cmbRoom.SelectedValue == null) ? "" : cmbRoom.SelectedValue.ToString(),
                    dateTimePickerNoteService.Text,
                    txtPriceRoom.Text.Trim() == "" ? "0" : txtPriceRoom.Text.Trim(),
                    txtTotalMoneyService.Text.Trim() == "" ? "0" : txtTotalMoneyService.Text.Trim(),
                    txtDebt.Text.Trim() == "" ? "0" : txtDebt.Text.Trim(),
                    txtTotal.Text.Trim() == "" ? "0" : txtTotal.Text.Trim(),
                    btnEdit.Text == "Edit" ? true : false);

                if (btnEdit.Text == "Edit")
                    serviceNoteEdit.EditCompletedHandler += FormTollBillsEdit_Completed;
                serviceNoteEdit.ShowDialog();
            }
        }
 private void btnAdd_Click(object sender, EventArgs e)
 {
     TollBillEdit tollBillsEdit = new TollBillEdit("SN00000008", "CTR0000006", 769000, "2015-09-18");
     tollBillsEdit.EditCompletedHandler += FormTollBillsEdit_Completed;
     tollBillsEdit.ShowDialog();
 }