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 = ; //纬度

         public  float longitude = ;    //经度

         public  float speed = ;

         public  float status = ;

         public  float direction = ;

         public  float geoideAltitude = ;

         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", );      //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, );  //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();
         }

         /// <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 > )
                 {
                     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>)
             {
                 string num = fields[].Trim();
                 if (num.Length >  && 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[].Trim().Length > )
                 {
                     //refresh  Altitude   更新海拔
                     if (refreshAltitude != null)
                     {
                         refreshAltitude(fields[].Trim());
                     }
                 }
             }

         }

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

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

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

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

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

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

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

             if (fields[].Trim().Length==)
             {
                 if (refreshDate!=null)
                 {
                     refreshDate(trandforDate(fields[].Trim()));
                 }
             }
             if ((latiDegree != ) && (latiMinute != (float)400.0))
             {
                 latitudeTemp = (float)(latiDegree + latiMinute / 60.0);
             }
             if ((longiDegree != ) && (longiMinute != (float)400.0))
             {
                 longitudeTemp = (float)(longiDegree + longiMinute / 60.0);
             }
             if (paramChanged)
             {
                 if (refreshLocation != null)
                 {
                     refreshLocation(fields[]+":"+latitudeTemp.ToString(), fields[]+":"+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 ""+date.Substring(, ) + "-" + date.Substring(, ) + "-" + date.Substring(, );
         }

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

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

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

             // 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();
            }
            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 = -;

        public bool Opened = false;

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

        [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, , , OPEN_EXISTING, , );
            // 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 = ;
            ctoCommPort.WriteTotalTimeoutMultiplier = ;
            ctoCommPort.WriteTotalTimeoutConstant = ;
            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 = ;
            //dcb.fBinary=1;
            dcbCommPort.flags |= ;
            if (Parity > )
            {
                //dcb.fParity=1
                dcbCommPort.flags |= ;
            }
            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 = ;
                ReadFile(hComm, BufBytes, NumBytes, ref BytesRead, ref ovlCommPort);
                try
                {
                    OutBytes = new byte[BytesRead];
                    Array.Copy(BufBytes, , OutBytes, , 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 = ;
                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 < )
            {
                return "-1";
            }
            else
            {
                strGPS = strGPS.Substring(findHander, strGPS.Length - findHander);
                string[] ArryTmp = strGPS.Split(",".ToCharArray());
                try
                {
                    if (ArryTmp[] == "V")
                    {
                        return "V";//没有信号
                    }
                    else
                    {
                        switch (strFind)
                        {
                            case "X":
                                return DM2DD(ArryTmp[]);

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

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

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

                            default:
                                return "V";

                        }
                    }
                }
                catch
                {
                    return "V";
                }
            }
        }
        public string T2Time(string strDate, string strTime)
        {
            string dT = "" + strDate.Substring(, ) + "-" + strDate.Substring(, ) + "-" + strDate.Substring(, );
            string TT = Convert.ToString(Convert.ToInt32(strTime.Substring(, ))) + ":" + strTime.Substring(, ) + ":" + strTime.Substring(, );
            DateTime T = Convert.ToDateTime(dT + " " + TT);
            T = T.AddHours();
            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(".") == )
            {
                //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(, ));
                double sDegree2 = Convert.ToDouble(DegreeMinutes.Substring(, DegreeMinutes.Length - ));
                string sTmp = Convert.ToString(sDegree2 / );
                sDegree2 = Convert.ToDouble(sTmp.Substring(, sTmp.Length));
                sDegree2 = sDegree2 / ;
                sDegree = Convert.ToString(sDegree1 + sDegree2);
                if (sDegree.Length > )
                    sDegree = sDegree.Substring(, );
                sReturn = sDegree;
            }
            else if (DegreeMinutes.IndexOf(".") == )
            {
                //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(, ));
                double sMinute2 = Convert.ToDouble(DegreeMinutes.Substring(, DegreeMinutes.Length - ));
                string sTmp = Convert.ToString(sMinute2 / );
                sMinute2 = Convert.ToDouble(sTmp.Substring(, sTmp.Length));
                sMinute2 = sMinute2 / ;
                sMinute = Convert.ToString(sMinute1 + sMinute2);
                if (sMinute.Length > )
                    sMinute = sMinute.Substring(, );
                sReturn = sMinute;
            }
            return sReturn;
        }
        public bool ScanPort()
        {

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

                }
                byte[] bytRead = Read();
                Close();
                if (Encoding.ASCII.GetString(bytRead, , bytRead.Length).IndexOf("$GP") >= )
                    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 - ];
            for (int i = ; i == ByteStrings.Length - ; 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 = ;
            double endTime = ;
            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(, ) + ":" + time.Substring(, ) + ":" + time.Substring(, );
        }
#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 *  + 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 = ;
            if (isEnglish())
            {
                n = ;
            }
            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 *  + 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(@"ControlPanel\Appearance");
                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