Admin.CustomerService.buttonOkChangeType_Click C# (CSharp) Method

        private void buttonOkChangeType_Click(object sender, EventArgs e)
        {
            String cardType = "";

            if (radioButtonOldman.Checked)
            {
                cardType = "oldman_card";
            }
            else if (radioButtonRegular.Checked)
            {
                cardType = "normal_card";
            }
            else if (radioButtonStaff.Checked)
            {
                cardType = "staff_card";
            }
            else if (radioButtonStudent.Checked)
            {
                cardType = "student_card";
            }
            else
            {
                this.panelChangeType.Visible = false;
                return;
            }

            if (changeType(cardType))
            {
                MessageBox.Show("改变成功", "提醒", MessageBoxButtons.OK);
                ResourceClass.cardInfo.CardType = cardType;
            }
            else
            {
                MessageBox.Show("改变失败", "提醒", MessageBoxButtons.OK);
            }

            this.panelChangeType.Visible = false;
            this.panelUserInfo.Visible = true;
        }