Win CE 6.0 获取手持机GPS定位2----示例代码 （C#）

一、须知

1.手持机(PDA)必须有GPS模块，才能通过代码使用串口通信获取GPS相关信息

2.要清楚自己手持机（PDA）固定的GPS通信串口号，如我们公司的手持机获取GPS信息的串口为COM4

3.测试手持机（PDA）是否获取到GPS相关信息，要到室外才能测试出来。

二、制作步骤

（1）新建好win ce项目

（2）封装类

1.CLR_GPS类

class CLR_GPS
    {

        public  float latitude = 0; //纬度

        public  float longitude = 0;    //经度

        public  float speed = 0;

        public  float status = 0;

        public  float direction = 0;

        public  float geoideAltitude = 0;

        private System.IO.Ports.SerialPort serialPort;

        CLR_Regex gpsRegex=new CLR_Regex();

        private bool isOpen = false;
        
        
#region 
        private delegate void myTestEventHandler();
        public delegate void LocationEventHandler(string Latitude, string Longitude,string status,bool isNorth,bool isEast,string time);
        public delegate void serialEventHandler(string data);
        public delegate void TimeEventHandler(string time);
        public delegate void DateEventHandler(string date);
        public delegate void satelliteEventHandlde(string n);
        public delegate void altitudeEventHandler(string altitude);
        public delegate void satelliteNumberEventHandler(string num);


        private string serialData = string.Empty;

        /// <summary>
        /// refresh serial data       更新串口数据
        /// </summary>
        public event serialEventHandler serialportData;   
      
        /// <summary>
        ///  Refresh Location   更新经纬度
        /// </summary>
        public event LocationEventHandler refreshLocation;     


        /// <summary>
        /// Refresh Time    更新时间
        /// </summary>
        public event TimeEventHandler refreshTime;              


        /// <summary>
        /// Refresh Date       更新日期
        /// </summary>
        public event DateEventHandler refreshDate;              


        /// <summary>
        /// Satellite Total     可视卫星数量
        /// </summary>
        public event satelliteNumberEventHandler refreshAllNumber;

        /// <summary>
        /// Refresh effective satellite 更新卫星数量
        /// </summary>
        public event satelliteEventHandlde refreshSatellite;    


        /// <summary>
        /// Refresh Altitude  更新海拔
        /// </summary>
        public event altitudeEventHandler refreshAltitude;     



#endregion
    


        public CLR_GPS()
        {
            serialPort = new System.IO.Ports.SerialPort("COM4", 115200);      //此处可根据实际情况设置串口
            serialPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serialPort_DataReceived);
           
        }

        public CLR_GPS(string portName)
        {
            serialPort = new System.IO.Ports.SerialPort(portName, 115200);  //此处可根据实际情况设置串口
            serialPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serialPort_DataReceived);
           
        }


        /// <summary>
        /// stop Receive data   停止接收数据
        /// </summary>
        public void stopReceive()
        {        
            isOpen = false;
            Thread.Sleep(300);
        }

        /// <summary>
        /// start Receiving     开始接收数据
        /// </summary>
        public bool startReceive()
        {
            try
            {
                isOpen = true;            
                if (!serialPort.IsOpen)
                {
                    serialPort.Open();
                }                                
                return true;
            }
            catch (System.Exception)
            {
                isOpen = false;
                return false;
            }          
           
        }


        /// <summary>
        /// initialization      初始化
        /// </summary>
        /// <returns></returns>
        public bool InitModule()
        {
            return true;  //此处可根据实际情况进行GPS模块的上电

        }



        public void FreeModule()
        {
            try
            {

                isOpen = false;


                if (serialPort.IsOpen)
                {
                    serialPort.Close();
                }

            }
            catch (Exception)
            {

            }
            //此处可根据实际情况进行GPS模块的下电
            
        }

        void serialPort_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            try
            {
                serialData = serialData + serialPort.ReadExisting();
                if (serialData.Length > 300)
                {
                    serialData = serialData.Substring(serialData.LastIndexOf('$'));
                }

                if (isOpen)
                {
                    if (serialportData != null)
                    {
                        serialportData(serialData);
                    }
                    AnalysisGPSData(serialData);

                }
            }
            catch { }
                          
        }

       


        private void AnalysisGPGGA(string scr)
        {
            string altitude = string.Empty;
            string[] fields = scr.Split(',');

           
            if (fields.Length>10)
            {
                string num = fields[7].Trim();
                if (num.Length > 0 && gpsRegex.isNumber(num))
                {
                    //satelliteNumber = Convert.ToInt32(fields[7].Trim());
                    if (refreshSatellite != null)
                    {
                        //Effective Satellite 更新使用卫星数量
                        refreshSatellite(num);
                    }
                }

                if (fields[9].Trim().Length > 0)
                {
                    //refresh  Altitude   更新海拔
                    if (refreshAltitude != null)
                    {        
                        refreshAltitude(fields[9].Trim());
                    }
                }
            }
           
               
        }


        private bool AnalysisGPRMC(string scr)
        {
            int latiDegree = 400, longiDegree = 400;
            float latiMinute = 400, longiMinute = 400, speedTemp = 0, directionTemp = direction;
            string statusTemp = string.Empty;
            float latitudeTemp = 400, longitudeTemp = 400;
            bool paramChanged = false;

            bool isNortHemisphere = true;
            bool isEastHemisphere=true;
            string time = string.Empty;

            string[] fields = scr.Split(',');

            if (fields.GetLength(0) < 12)
                return false;
            // 状态

            string[] utc = fields[1].Trim().Split('.');


            if (utc[0].Trim().Length == 6)
            {
                time = utc[0].Trim();
                if (refreshTime!=null)
                {
                    refreshTime(time);
                }
            }

            if (fields[2]=="A")
            {
                // //= Convert.ToChar(fields[2]);
                //char d = Convert.ToChar(fields[2]);
                statusTemp = fields[2];
            }
            // Lati 
            if (fields[3].Length > 5)
            {
                if (System.Text.RegularExpressions.Regex.Match(fields[3], @"^[0-9]+[.]?([d]+)?").Value == fields[3])
                {
                    latiDegree = Convert.ToInt32(fields[3].Substring(0, 2), 10);
                    latiMinute = Convert.ToSingle(fields[3].Substring(2, fields[3].Length - 2));
                    paramChanged = true;
                }
            }
            // NSHemisphere  NSHemisphere     南北半球
            if (fields[4].Length == 1)
            {
                //'s' 'S' 
                if (string.Equals(fields[4], "S", StringComparison.CurrentCultureIgnoreCase))
                {
                    isNortHemisphere = false;   //南半球
                    latitudeTemp = -latitudeTemp;
                }
            }
            // long 
            if (fields[5].Length > 5)
            {
                if (System.Text.RegularExpressions.Regex.Match(fields[5], @"^[0-9]+[.]?([d]+)?").Value == fields[5])
                {
                    longiDegree = Convert.ToInt32(fields[5].Substring(0, 3), 10);
                    longiMinute = Convert.ToSingle(fields[5].Substring(3, fields[5].Length - 3));
                    paramChanged = true;
                }
            }
            // EWHemisphere    东经 西经
            if (fields[6].Length == 1)
            {
                //'w' 'W' 
                if (string.Equals(fields[6], "W", StringComparison.CurrentCultureIgnoreCase))
                {
                    isEastHemisphere=false; //西半球
                    longitudeTemp = -longitudeTemp;
                }
            }
            // speed    速率
            if (fields[7].Length > 2)
            {
                if (System.Text.RegularExpressions.Regex.Match(fields[7], @"^[0-9]+[.]?([d]+)?").Value == fields[7])
                {
                    speedTemp = (float)(Convert.ToSingle(fields[7]) * 1.852);
                    paramChanged = true;
                }
            }
            // direction   地面航向 正北为零度
            if (fields[8].Length > 2)
            {
                if (System.Text.RegularExpressions.Regex.Match(fields[8], @"^[0-9]+[.]?([d]+)?").Value == fields[8])
                {
                    directionTemp = Convert.ToSingle(fields[8]);
                    paramChanged = true;
                }
            }

            if (fields[9].Trim().Length==6)
            {
                if (refreshDate!=null)
                {
                    refreshDate(trandforDate(fields[9].Trim()));
                }
            }
            if ((latiDegree != 400) && (latiMinute != (float)400.0))
            {
                latitudeTemp = (float)(latiDegree + latiMinute / 60.0);
            }
            if ((longiDegree != 400) && (longiMinute != (float)400.0))
            {
                longitudeTemp = (float)(longiDegree + longiMinute / 60.0);
            }
            if (paramChanged)
            {
                if (refreshLocation != null)
                {
                    refreshLocation(fields[4]+":"+latitudeTemp.ToString(), fields[6]+":"+longitudeTemp.ToString(), statusTemp,isNortHemisphere,isEastHemisphere, time);
                }
                    return true;            
            }
            else
                return false;
        }


        /// <summary>
        /// data  for date  将GPS数据转换成日期
        /// </summary>
        /// <param name="date"></param>
        /// <returns></returns>
        string trandforDate(string date)
        {
            return "20"+date.Substring(4, 2) + "-" + date.Substring(2, 2) + "-" + date.Substring(0, 2);
        }




        void AnalysisGPGSV(string scr)
        {
            string[] fields = scr.Split(',');

            if (fields.Length>4)
            {
                string AllNum = fields[3].Trim();

                if (AllNum.Length > 0 && gpsRegex.isNumber(AllNum) && refreshAllNumber != null)
                {
                    //Satellite Total
                    refreshAllNumber(fields[3]);
                }
            }

            // 状态
        }


        private void AnalysisGPSData(string sGpsData)
        {
            string[] gpsDataSplit = sGpsData.Trim().Split('$');


            foreach (string gps in gpsDataSplit)
            {
                if (gps.StartsWith("GPRMC"))
                {
                    AnalysisGPRMC(gps);
                }
                else if (gps.StartsWith("GPVTG"))
                {
                    AnalysisGPVTG(gps);
                }
                else if (gps.StartsWith("GPGGA"))
                {
                    AnalysisGPGGA(gps);
                }
                else if (gps.StartsWith("GPGSV"))
                {
                    AnalysisGPGSV(gps);
                }
                else if (gps.StartsWith("GPGLL"))
                {

                }
            }
            return;
        }


         public void AnalysisGPVTG(string sGpsData)
         {

         }

    }

2.CLR_Regex类

class CLR_Regex
    {
        //public bool includeXing(string msg)
        //{           
        //    if (Regex.Match(msg, @"^[0-9]+[*]?([d]+)?").Value == msg)
        //    {
        //        return true;
        //    }
        //    else
        //        return false;
        //}


        /// <summary>
        /// is number ?  是否全是数字
        /// </summary>
        /// <param name="msg"></param>
        /// <returns></returns>
        public bool isNumber(string msg)
        {
          
            if (Regex.Match(msg, "^[0-9]*$").Value == msg)
            {
                return true;
            }
            else
                return false;
        }

        /// <summary>
        /// is real   是否为实数
        /// </summary>
        /// <param name="msg"></param>
        /// <returns></returns>
        public bool isRealData(string msg)
        {
            if (msg.StartsWith("-"))
            {
                msg = msg.Substring(1);
            }
            if (Regex.Match(msg, "^[0-9]+(.[0-9]+)$").Value == msg)
            {
                return true;
            }
            else
                return false;

        }


    }

3.GPS类

class GPS
    {
        public string PortNum;
        public int BaudRate;
        public byte ByteSize;
        public byte Parity; // 0-4=no,odd,even,mark,space 
        public byte StopBits; // 0,1,2 = 1, 1.5, 2 
        public int ReadTimeout;

        //comm port win32 file handle
        private int hComm = -1;

        public bool Opened = false;

        //win32 api constants
        private const uint GENERIC_READ = 0x80000000;
        private const uint GENERIC_WRITE = 0x40000000;
        private const int OPEN_EXISTING = 3;
        private const int INVALID_HANDLE_VALUE = -1;

        [StructLayout(LayoutKind.Sequential)]
        public struct DCB
        {
            //taken from c struct in platform sdk 
            public int DCBlength; // sizeof(DCB) 
            public int BaudRate; // 指定当前波特率 current baud rate
            // these are the c struct bit fields, bit twiddle flag to set
            public int fBinary; // 指定是否允许二进制模式,在windows95中必须主TRUE binary mode, no EOF check 
            public int fParity; // 指定是否允许奇偶校验 enable parity checking 
            public int fOutxCtsFlow; // 指定CTS是否用于检测发送控制，当为TRUE是CTS为OFF，发送将被挂起。 CTS output flow control 
            public int fOutxDsrFlow; // 指定CTS是否用于检测发送控制 DSR output flow control 
            public int fDtrControl; // DTR_CONTROL_DISABLE值将DTR置为OFF, DTR_CONTROL_ENABLE值将DTR置为ON, DTR_CONTROL_HANDSHAKE允许DTR"握手" DTR flow control type 
            public int fDsrSensitivity; // 当该值为TRUE时DSR为OFF时接收的字节被忽略 DSR sensitivity
            public int fTXContinueOnXoff; // 指定当接收缓冲区已满,并且驱动程序已经发送出XoffChar字符时发送是否停止。TRUE时，在接收缓冲区接收到缓冲区已满的字节XoffLim且驱动程序已经发送出XoffChar字符中止接收字节之后，发送继续进行。FALSE时，在接收缓冲区接收到代表缓冲区已空的字节XonChar且驱动程序已经发送出恢复发送的XonChar之后，发送继续进行。XOFF continues Tx 
            public int fOutX; // TRUE时，接收到XoffChar之后便停止发送接收到XonChar之后将重新开始 XON/XOFF out flow control 
            public int fInX; // TRUE时，接收缓冲区接收到代表缓冲区满的XoffLim之后，XoffChar发送出去接收缓冲区接收到代表缓冲区空的XonLim之后，XonChar发送出去 XON/XOFF in flow control 
            public int fErrorChar; // 该值为TRUE且fParity为TRUE时，用ErrorChar 成员指定的字符代替奇偶校验错误的接收字符 enable error replacement 
            public int fNull; // eTRUE时，接收时去掉空（0值）字节 enable null stripping 
            public int fRtsControl; // RTS flow control 
            /*RTS_CONTROL_DISABLE时,RTS置为OFF
            RTS_CONTROL_ENABLE时, RTS置为ON
            RTS_CONTROL_HANDSHAKE时,
            当接收缓冲区小于半满时RTS为ON
            当接收缓冲区超过四分之三满时RTS为OFF
            RTS_CONTROL_TOGGLE时,
            当接收缓冲区仍有剩余字节时RTS为ON ,否则缺省为OFF*/
            public int fAbortOnError; // TRUE时,有错误发生时中止读和写操作 abort on error 
            public int fDummy2; // 未使用 reserved 

            public uint flags;
            public ushort wReserved; // 未使用,必须为0 not currently used 
            public ushort XonLim; // 指定在XON字符发送这前接收缓冲区中可允许的最小字节数 transmit XON threshold 
            public ushort XoffLim; // 指定在XOFF字符发送这前接收缓冲区中可允许的最小字节数 transmit XOFF threshold 
            public byte ByteSize; // 指定端口当前使用的数据位 number of bits/byte, 4-8 
            public byte Parity; // 指定端口当前使用的奇偶校验方法,可能为:EVENPARITY,MARKPARITY,NOPARITY,ODDPARITY 0-4=no,odd,even,mark,space 
            public byte StopBits; // 指定端口当前使用的停止位数,可能为:ONESTOPBIT,ONE5STOPBITS,TWOSTOPBITS 0,1,2 = 1, 1.5, 2 
            public char XonChar; // 指定用于发送和接收字符XON的值 Tx and Rx XON character 
            public char XoffChar; // 指定用于发送和接收字符XOFF值 Tx and Rx XOFF character 
            public char ErrorChar; // 本字符用来代替接收到的奇偶校验发生错误时的值 error replacement character 
            public char EofChar; // 当没有使用二进制模式时,本字符可用来指示数据的结束 end of input character 
            public char EvtChar; // 当接收到此字符时,会产生一个事件 received event character 
            public ushort wReserved1; // 未使用 reserved; do not use 
        }
        [StructLayout(LayoutKind.Sequential)]
        private struct COMMTIMEOUTS
        {
            public int ReadIntervalTimeout;
            public int ReadTotalTimeoutMultiplier;
            public int ReadTotalTimeoutConstant;
            public int WriteTotalTimeoutMultiplier;
            public int WriteTotalTimeoutConstant;
        }
        [StructLayout(LayoutKind.Sequential)]
        private struct OVERLAPPED
        {
            public int Internal;
            public int InternalHigh;
            public int Offset;
            public int OffsetHigh;
            public int hEvent;
        }

        [DllImport("coredll.dll")]
        private static extern int CreateFile(
        string lpFileName, // 要打开的串口名称
        uint dwDesiredAccess, // 指定串口的访问方式，一般设置为可读可写方式
        int dwShareMode, // 指定串口的共享模式，串口不能共享，所以设置为0
        int lpSecurityAttributes, // 设置串口的安全属性，WIN9X下不支持，应设为NULL
        int dwCreationDisposition, // 对于串口通信，创建方式只能为OPEN_EXISTING
        int dwFlagsAndAttributes, // 指定串口属性与标志，设置为FILE_FLAG_OVERLAPPED(重叠I/O操作)，指定串口以异步方式通信
        int hTemplateFile // 对于串口通信必须设置为NULL
        );
        [DllImport("coredll.dll")]
        private static extern bool GetCommState(
        int hFile, //通信设备句柄
        ref DCB lpDCB // 设备控制块DCB
        );
        [DllImport("coredll.dll")]
        private static extern bool BuildCommDCB(
        string lpDef, // 设备控制字符串
        ref DCB lpDCB // 设备控制块
        );
        [DllImport("coredll.dll")]
        private static extern bool SetCommState(
        int hFile, // 通信设备句柄
        ref DCB lpDCB // 设备控制块
        );
        [DllImport("coredll.dll")]
        private static extern bool GetCommTimeouts(
        int hFile, // 通信设备句柄 handle to comm device
        ref COMMTIMEOUTS lpCommTimeouts // 超时时间 time-out values
        );
        [DllImport("coredll.dll")]
        private static extern bool SetCommTimeouts(
        int hFile, // 通信设备句柄 handle to comm device
        ref COMMTIMEOUTS lpCommTimeouts // 超时时间 time-out values
        );
        [DllImport("coredll.dll")]
        private static extern bool ReadFile(
        int hFile, // 通信设备句柄 handle to file
        byte[] lpBuffer, // 数据缓冲区 data buffer
        int nNumberOfBytesToRead, // 多少字节等待读取 number of bytes to read
        ref int lpNumberOfBytesRead, // 读取多少字节 number of bytes read
        ref OVERLAPPED lpOverlapped // 溢出缓冲区 overlapped buffer
        );
        [DllImport("coredll.dll")]
        private static extern bool WriteFile(
        int hFile, // 通信设备句柄 handle to file
        byte[] lpBuffer, // 数据缓冲区 data buffer
        int nNumberOfBytesToWrite, // 多少字节等待写入 number of bytes to write
        ref int lpNumberOfBytesWritten, // 已经写入多少字节 number of bytes written
        ref OVERLAPPED lpOverlapped // 溢出缓冲区 overlapped buffer
        );
        [DllImport("coredll.dll")]
        private static extern bool CloseHandle(
        int hObject // handle to object
        );
        [DllImport("coredll.dll")]
        private static extern uint GetLastError();

        public void Open()
        {

            DCB dcbCommPort = new DCB();
            COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS();

            // 打开串口 OPEN THE COMM PORT.
            hComm = CreateFile(PortNum, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
            // 如果串口没有打开，就打开 IF THE PORT CANNOT BE OPENED, BAIL OUT.
            if (hComm == INVALID_HANDLE_VALUE)
            {
                throw (new ApplicationException("非法操作，不能打开串口！"));
            }

            // 设置通信超时时间 SET THE COMM TIMEOUTS.
            GetCommTimeouts(hComm, ref ctoCommPort);
            ctoCommPort.ReadTotalTimeoutConstant = ReadTimeout;
            ctoCommPort.ReadTotalTimeoutMultiplier = 0;
            ctoCommPort.WriteTotalTimeoutMultiplier = 0;
            ctoCommPort.WriteTotalTimeoutConstant = 0;
            SetCommTimeouts(hComm, ref ctoCommPort);

            // 设置串口 SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.
            GetCommState(hComm, ref dcbCommPort);
            dcbCommPort.BaudRate = BaudRate;
            dcbCommPort.flags = 0;
            //dcb.fBinary=1;
            dcbCommPort.flags |= 1;
            if (Parity > 0)
            {
                //dcb.fParity=1
                dcbCommPort.flags |= 2;
            }
            dcbCommPort.Parity = Parity;
            dcbCommPort.ByteSize = ByteSize;
            dcbCommPort.StopBits = StopBits;
            if (!SetCommState(hComm, ref dcbCommPort))
            {
                //uint ErrorNum=GetLastError();
                throw (new ApplicationException("非法操作，不能打开串口！"));
            }
            //unremark to see if setting took correctly
            //DCB dcbCommPort2 = new DCB();
            //GetCommState(hComm, ref dcbCommPort2);
            Opened = true;
        }

        public void Close()
        {
            if (hComm != INVALID_HANDLE_VALUE)
            {
                CloseHandle(hComm);
            }
        }

        public byte[] Read(int NumBytes)
        {
            byte[] BufBytes;
            byte[] OutBytes;
            BufBytes = new byte[NumBytes];
            if (hComm != INVALID_HANDLE_VALUE)
            {
                OVERLAPPED ovlCommPort = new OVERLAPPED();
                int BytesRead = 0;
                ReadFile(hComm, BufBytes, NumBytes, ref BytesRead, ref ovlCommPort);
                try
                {
                    OutBytes = new byte[BytesRead];
                    Array.Copy(BufBytes, 0, OutBytes, 0, BytesRead);
                }
                catch
                {
                    return BufBytes;
                }

            }
            else
            {
                throw (new ApplicationException("串口未打开！"));
            }
            return OutBytes;
            // return BufBytes;
        }

        public void Write(byte[] WriteBytes)
        {
            if (hComm != INVALID_HANDLE_VALUE)
            {
                OVERLAPPED ovlCommPort = new OVERLAPPED();
                int BytesWritten = 0;
                WriteFile(hComm, WriteBytes, WriteBytes.Length, ref BytesWritten, ref ovlCommPort);
            }
            else
            {
                throw (new ApplicationException("串口未打开！"));
            }
        }
        public string GetGPS(string strGPS, string strFind)
        {
            ///从GPS中读取的数据中,找出想要的数据
            ///GPSstring原始字符串，
            ///strFind要查找的内容,X:经度，Y：纬度，T：时间，V：速度，是数字从1开始，即以“，”分隔的位置
            ///返回查找到指定位置的字符串
            string handerStr = "$GPRMC";//GPS串头
            int findHander = strGPS.IndexOf(handerStr);//看是否含有GPS串头
            if (findHander < 0)
            {
                return "-1";
            }
            else
            {
                strGPS = strGPS.Substring(findHander, strGPS.Length - findHander);
                string[] ArryTmp = strGPS.Split(",".ToCharArray());
                try
                {
                    if (ArryTmp[2] == "V")
                    {
                        return "V";//没有信号
                    }
                    else
                    {
                        switch (strFind)
                        {
                            case "X":
                                return DM2DD(ArryTmp[5]);

                            case "Y":
                                return DM2DD(ArryTmp[3]);

                            case "T":
                                return T2Time(ArryTmp[9], ArryTmp[1]);

                            case "V":
                                return Convert.ToString(Convert.ToDouble(ArryTmp[7]) * 1.852);

                            default:
                                return "V";

                        }
                    }
                }
                catch
                {
                    return "V";
                }
            }
        }
        public string T2Time(string strDate, string strTime)
        {
            string dT = "20" + strDate.Substring(4, 2) + "-" + strDate.Substring(2, 2) + "-" + strDate.Substring(0, 2);
            string TT = Convert.ToString(Convert.ToInt32(strTime.Substring(0, 2))) + ":" + strTime.Substring(2, 2) + ":" + strTime.Substring(4, 2);
            DateTime T = Convert.ToDateTime(dT + " " + TT);
            T = T.AddHours(8);
            return T.ToString();
        }
        public string DM2DD(string DegreeMinutes)
        {
            //转换NMEA协议的“度分”格式为十进制“度度”格式
            string sDegree;
            string sMinute;
            string sReturn = "";
            if (DegreeMinutes.IndexOf(".") == 4)
            {
                //DegreeMinutes = Replace(DegreeMinutes, ".", "")
                //DM2DD = CDbl(Left(DegreeMinutes, 2)) + CDbl(Left(CStr(CDbl(Right(DegreeMinutes, Len(DegreeMinutes) - 2)) / 60), 8)) / 10000
                DegreeMinutes = DegreeMinutes.Replace(".", "");
                double sDegree1 = Convert.ToDouble(DegreeMinutes.Substring(0, 2));
                double sDegree2 = Convert.ToDouble(DegreeMinutes.Substring(2, DegreeMinutes.Length - 2));
                string sTmp = Convert.ToString(sDegree2 / 60);
                sDegree2 = Convert.ToDouble(sTmp.Substring(0, sTmp.Length));
                sDegree2 = sDegree2 / 10000;
                sDegree = Convert.ToString(sDegree1 + sDegree2);
                if (sDegree.Length > 11)
                    sDegree = sDegree.Substring(0, 11);
                sReturn = sDegree;
            }
            else if (DegreeMinutes.IndexOf(".") == 5)
            {
                //DegreeMinutes = Replace(DegreeMinutes, ".", "")
                //DM2DD = CDbl(Left(DegreeMinutes, 2)) + CDbl(Left(CStr(CDbl(Right(DegreeMinutes, Len(DegreeMinutes) - 2)) / 60), 8)) / 10000
                DegreeMinutes = DegreeMinutes.Replace(".", "");
                double sMinute1 = Convert.ToDouble(DegreeMinutes.Substring(0, 3));
                double sMinute2 = Convert.ToDouble(DegreeMinutes.Substring(3, DegreeMinutes.Length - 2));
                string sTmp = Convert.ToString(sMinute2 / 60);
                sMinute2 = Convert.ToDouble(sTmp.Substring(0, sTmp.Length));
                sMinute2 = sMinute2 / 10000;
                sMinute = Convert.ToString(sMinute1 + sMinute2);
                if (sMinute.Length > 10)
                    sMinute = sMinute.Substring(0, 10);
                sReturn = sMinute;
            }
            return sReturn;
        }
        public bool ScanPort()
        {

            try
            {
                if (Opened)
                {
                    Close();
                    Open();
                }
                else
                {
                    Open();//打开串口

                }
                byte[] bytRead = Read(512);
                Close();
                if (Encoding.ASCII.GetString(bytRead, 0, bytRead.Length).IndexOf("$GP") >= 0)
                    return true;
                else
                    return false;
            }
            catch
            {
                return false;
            }
        }
    }
    class HexCon
    {
        // 把十六进制字符串转换成字节型和把字节型转换成十六进制字符串 converter hex string to byte and byte to hex string
        public static string ByteToString(byte[] InBytes)
        {
            string StringOut = "";
            foreach (byte InByte in InBytes)
            {
                StringOut = StringOut + String.Format("{0:X2} ", InByte);
            }
            return StringOut;
        }
        public static byte[] StringToByte(string InString)
        {
            string[] ByteStrings;
            ByteStrings = InString.Split(" ".ToCharArray());
            byte[] ByteOut;
            ByteOut = new byte[ByteStrings.Length - 1];
            for (int i = 0; i == ByteStrings.Length - 1; i++)
            {
                ByteOut[i] = Convert.ToByte(("0x" + ByteStrings[i]));
            }
            return ByteOut;
        }
    }

（3）界面设计

（4）获取GPS相关信息

public partial class TestGps : Form
    {
        #region 
            private delegate void mySerial();
            private delegate void myTestEventHandler();
            //private event myTestEventHandler myTest();
            private string gprsData = string.Empty;
         
            private bool isClosed = false;

            public delegate void LocationShow(string Latitude, string Longitude, string status, bool isNorth, bool isEast, string time);

            public delegate void portDataShow(string data);

            double beginTime = 0;
            double endTime = 0;
            CLR_GPS gps;
            
            bool firstLocation = false;
        
        #endregion

        public TestGps()
        {
            InitializeComponent();
            gps = new CLR_GPS();
            gps.refreshLocation += gps_refreshLocation;
            gps.refreshTime += gps_refreshTime;
            gps.refreshDate += gps_refreshDate;
            //gps.refreshAltitude += new CLR_GPS.altitudeEventHandler(gps_refreshAltitude);
            gps.refreshSatellite += gps_refreshSatellite;
            gps.refreshAllNumber += gps_refreshAllNumber;
            gps.InitModule();
        }

        #region Satellite Total
        void gps_refreshAllNumber(string num)
        {
            if (isClosed)
            {
                return;
            }
            Invoke(new portDataShow(showNumber), num);
        }

        void showNumber(string num)
        {
            textBoxAll.Text = num;
        }
#endregion

        #region Refresh effective satellite
        void gps_refreshSatellite(string n)
        {
            if (isClosed)
            {
                return;
            }
            Invoke(new portDataShow(showSatellite), n);
        }

        void showSatellite(string n)
        {
            textBoxsatellite.Text = n;
        }
#endregion

        #region     refresh Altitude
        //void gps_refreshAltitude(string altitude)
        //{
        //    if (isClosed)
        //    {
        //        return;
        //    }
        //    this.Invoke(new portDataShow(showAltitude), altitude);
        //}

        //void showAltitude(string altitude)
        //{
        //    textBoxAltitude.Text = altitude;
        //}
        #endregion
     
        #region refresh date
        void gps_refreshDate(string date)
        {
            if (isClosed)
            {
                return;
            }
            Invoke(new portDataShow(showDate), date);
        }

        void showDate(string date)
        {
            textBoxDate.Text = date;
        }
#endregion

        #region  refresh time
        void gps_refreshTime(string time)
        {
            if (isClosed)
            {
                return;
            }
            Invoke(new portDataShow(showTime), time);
        }

        void showTime(string time)
        {
            textBoxTime.Text = time.Substring(0, 2) + ":" + time.Substring(2, 2) + ":" + time.Substring(4, 2);
        }
#endregion

        #region refresh location
        void gps_refreshLocation(string Latitude, string Longitude, string status, bool isNorth, bool isEast, string time)
        {
            if (isClosed)
            {
                return;
            }
            Invoke(new LocationShow(showLocation), Latitude, Longitude, status, isNorth, isEast, time);
        }  
        private void showLocation(string Latitude, string Longitude, string status, bool isNorth, bool isEast,string time)
        {
            if (!firstLocation)
            {
                firstLocation = true;
                endTime = DateTime.Now.Minute * 60 + DateTime.Now.Second;

                textBoxAccess.Text = Convert.ToString(DateTime.Now.TimeOfDay.ToString());

                textBoxSpend.Text = Convert.ToString(endTime - beginTime);
            }
            textBoxLa.Text = Latitude;
            textBoxLo.Text = Longitude;            
        }

#endregion


        #region 窗体加载事件 判断操作系统是中文还是英文 进行控件赋值
        private void MainForm_Load(object sender, EventArgs e)
        {
            int n = 0;
            if (isEnglish())
            {
                n = 1;
            }
            labelDate.Text = TextDate[n];
            labelTime.Text = TextTime[n];
            labelLa.Text = TextLatitude[n];
            labelLo.Text = TextLongitude[n];
            labelAll.Text = TextSatelliteTotal[n];
            labelUsed.Text = TextEffectiveSatellite[n];
            //labelAltitude.Text = TextAltitude[n];
            labelCurr.Text = TextCurr[n];
            labelBegin.Text = TextBegin[n];
            labelAccess.Text = TextAcees[n];
            labelSpend.Text = TextSpend[n];
            labelSecond.Text = TextSecond[n];
        } 
        #endregion

        #region 获取GPS相应信息
        private void btnGet_Click(object sender, EventArgs e)
        {
            //gps.InitModule();
            btnStop.Enabled = true;

            btnGet.Enabled = false;

            btnStop.Focus();


            if (!gps.startReceive())
            {
                MessageBox.Show("get data failure, the port is not open.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Asterisk, MessageBoxDefaultButton.Button1);
                return;
            }
            isClosed = false;
            firstLocation = false;
            beginTime = System.DateTime.Now.Minute * 60 + DateTime.Now.Second;
            textBoxBeginTime.Text = Convert.ToString(DateTime.Now.TimeOfDay.ToString());

        } 
        #endregion

        #region 读取注册表信息,判断是不是英文操作系统
        /// <summary>
        /// Read registry information, judge whether English OS  读取注册表信息,判断是不是英文操作系统    
        /// </summary>
        /// <returns></returns>
        public static bool isEnglish()
        {
            try
            {
                var RegKey = Registry.CurrentUser.OpenSubKey(@"ControlPanelAppearance");
                if ("Windows 标准" == RegKey.GetValue("Current").ToString())
                    return false;
                return true;
            }
            catch (Exception)
            {
                return true;
            }
        } 
        #endregion

        #region 停止GPS接收
        private void btnStop_Click(object sender, EventArgs e)
        {
            gps.stopReceive();

            isClosed = true;
            btnGet.Enabled = true;

            btnStop.Enabled = false;

            btnGet.Focus();

        } 
        #endregion

        #region GPS下电操作
        private void MainForm_Closed(object sender, EventArgs e)
        {
            gps.FreeModule();
        } 
        #endregion

        #region Interface language 界面语言

        private string[] TextDate = new [] { "日期:", "Date:" };
        private string[] TextTime = new [] { "UTC时间:", "UTC time:" };
        private string[] TextLongitude = new [] { "经度:", "Longitude:" };
        private string[] TextLatitude = new [] { "纬度", "Latitude:" };
        private string[] TextSatelliteTotal =new []{"可视卫星数量:","Satellite Total:"};
        private string[] TextEffectiveSatellite =new []{"可用卫星数量:","Effective number:"};
        private string[] TextAltitude = new [] { "海拔:", "Altitude:" };
        private string[] TextCurr = new [] { "当前时间等于UTC时间加上当地所属时区", "current time=UTC time +local time zone" };
        private string[] TextBegin = new [] { "开始时间:", "Begin time:" };
        private string[] TextAcees = new [] { "获取时间", "Access time:" };
        private string[] TextSpend = new [] { "有效定位时间", "Spending time:" };

        private string[] TextSecond = new string[] { "秒", "second" };
        #endregion

        #region 关闭窗口按钮
        private void buttonClosed_Click(object sender, EventArgs e)
        {
            if (btnStop.Enabled)
            {
                btnStop_Click(sender, e);
            }
            Close();
        } 
        #endregion
    }

代码下载地址：http://download.csdn.net/detail/lzf137927/6041519