关闭C#主窗体弹出是否关闭对话框

        private void Frm_Main_FormClosing(object sender, FormClosingEventArgs e)

        {

            DialogResult TS = MessageBox.Show("确定要关闭并退出程序？", "退出提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question);

            if (TS == DialogResult.Yes)

            {

                e.Cancel = false;

                //

                if (m_bConnected == true)

                {

                    int iResult = ADSHal.ADSHalAPI.ADS_DisconnectController(ref m_comAdatpter, ref m_comm);  //断开连接连接门禁控制器

                    ADSHelp.PromptResult(iResult, true);

                    if (iResult == (int)ADSHal.ADSHalConstant.ADS_ResultCode.ADS_RC_SUCCESS)

                    {

                        //this.Text = "门禁Demo";

                        this.Text = "门禁连接断开";

                        m_bConnected = false;

                    }

                }

            }

            else

            {

                e.Cancel = true;

            }

        }