SerialPort sp1 = new SerialPort();

getBloodPressur();

public void getBloodPressur()

        {

            try

            {

                string[] str = SerialPort.GetPortNames();

                if (str == null)

                {

                    MessageBox.Show("仪器未连接，请确认连接是否正常！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Error);

                }

                sp1.DataReceived += new SerialDataReceivedEventHandler(sp1_DataReceived);

                //准备就绪

                sp1.DtrEnable = true;

                sp1.RtsEnable = true;

                //设置数据读取超时为1秒

                sp1.ReadTimeout = ;

                foreach (string s in System.IO.Ports.SerialPort.GetPortNames())//获取有多少个COM口

                {

                    sp1.PortName = s;

                }

                sp1.BaudRate = System.Convert.ToInt32("");      //波特率

                sp1.DataBits = System.Convert.ToInt32("");       //数据位

                sp1.StopBits = StopBits.One;//停止位

                sp1.Parity = Parity.Even;//校验位

                sp1.Close();

                if (sp1.IsOpen == true)//如果打开状态，则先关闭一下

                {

                    sp1.Close();

                }

                sp1.Open();

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }

void sp1_DataReceived(object sender, SerialDataReceivedEventArgs e)

        {

            if (sp1.IsOpen)

            {

                byte[] byteRead = new byte[sp1.BytesToRead];    //BytesToRead:sp1接收的字符个数

                try

                {

                    Byte[] receivedData = new Byte[sp1.BytesToRead];        //创建接收字节数组

                    sp1.Read(receivedData, , receivedData.Length);         //读取数据

                    sp1.DiscardInBuffer();                                  //清空SerialPort控件的Buffer

                    string strRcv = null;

                    for (int i = ; i < receivedData.Length; i++)

                    {

                        strRcv += ((char)System.Convert.ToInt32(receivedData[i]));

                    }

                    Thread.Sleep();

                    if (strRcv.Split(' ').Length > )

                    {

                        strBloodPressur = strRcv.Substring(strRcv.Length - , );

                        if (dicBloodPressur.ContainsKey("") && dicBloodPressur.ContainsKey("") && dicBloodPressur.ContainsKey(""))

                        {

                            if (dtExamCopy.Select("EXAM_ID = '" + dicBloodPressur[""].Split(',')[] + "' AND EXAM_DETAIL_ID = '" + dicBloodPressur[""].Split(',')[] + "'")[]["RESULT_VALUE"].ToString().Trim().Length == )

                            {

                                dtExamCopy.Select("EXAM_ID = '" + dicBloodPressur[""].Split(',')[] + "' AND EXAM_DETAIL_ID = '" + dicBloodPressur[""].Split(',')[] + "'")[]["RESULT_VALUE"] = System.Convert.ToInt32(strBloodPressur.Split(' ')[]).ToString() + "/" + System.Convert.ToInt32(strBloodPressur.Split(' ')[]).ToString();

                                checkExamItemAbnormal(dtExamCopy.Rows.IndexOf(dtExamCopy.Select("EXAM_ID = '" + dicBloodPressur[""].Split(',')[] + "' AND EXAM_DETAIL_ID = '" + dicBloodPressur[""].Split(',')[] + "'")[]));

                            }

                            else

                            {

                                dtExamCopy.Select("EXAM_ID = '" + dicBloodPressur[""].Split(',')[] + "' AND EXAM_DETAIL_ID = '" + dicBloodPressur[""].Split(',')[] + "'")[]["RESULT_VALUE"] = System.Convert.ToInt32(strBloodPressur.Split(' ')[]).ToString() + "/" + System.Convert.ToInt32(strBloodPressur.Split(' ')[]).ToString();

                                checkExamItemAbnormal(dtExamCopy.Rows.IndexOf(dtExamCopy.Select("EXAM_ID = '" + dicBloodPressur[""].Split(',')[] + "' AND EXAM_DETAIL_ID = '" + dicBloodPressur[""].Split(',')[] + "'")[]));

                            }

                            dtExamCopy.Select("EXAM_ID = '" + dicBloodPressur[""].Split(',')[] + "' AND EXAM_DETAIL_ID = '" + dicBloodPressur[""].Split(',')[] + "'")[]["RESULT_VALUE"] = System.Convert.ToInt32(strBloodPressur.Split(' ')[]).ToString();

                            checkExamItemAbnormal(dtExamCopy.Rows.IndexOf(dtExamCopy.Select("EXAM_ID = '" + dicBloodPressur[""].Split(',')[] + "' AND EXAM_DETAIL_ID = '" + dicBloodPressur[""].Split(',')[] + "'")[]));

                        }

                    }

                }

                catch (System.Exception ex)

                {

                    MessageBox.Show(ex.Message, "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Error);

                }

            }

            else

            {

                MessageBox.Show("仪器未连接，请确认仪器连接是否正常！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);

            }

        }