Admin.ServiceInfo.buttonCustomerService_Click C# (CSharp) Метод

        private void buttonCustomerService_Click(object sender, EventArgs e)
        {
            if (userCardID.Text.Length == 0 || userCardID.Text == null)
            {
                MessageBox.Show("请输入8位公交卡号", "警告", MessageBoxButtons.OK);
            }
            else if (userCardID.Text.Length != 8)
            {
                MessageBox.Show("8位公交卡号输入错误", "出错", MessageBoxButtons.OK);
            }
            else
            {
                if (validateCard())
                {
                    ResourceClass.cardId = userCardID.Text;
                    getCardInfo();
                    ResourceClass.userInfo = getUserInfo();
                    new Thread(new ThreadStart(goToCustomerService)).Start();
                    Close();
                }
                else
                    MessageBox.Show("卡号错误", "出错", MessageBoxButtons.OK);
            }
        }