C# 在PC上的通过蓝牙(bluetooth)发送数据到手机 / 开普饭

dotNET跨平台今天

以下文章来源于后端Q ，作者conan

概述

在PC端用.NET开发一个蓝牙下载的程序。实现在PC上查找周围的蓝牙设备（主要是手机），并将PC上的文件通过蓝牙传输到手机上。目前我采用的是OpenNETCF.Net.Bluetooth，能够正常发现周围的蓝牙设备，手机也能够正常进行蓝牙连接并接收文件。

代码实现

1、查找周围蓝牙设备

BluetoothClient bc = new BluetoothClient();        BluetoothDeviceInfo[] bdi;        bdi = bc.DiscoverDevices(10);//查找周围最多10个蓝牙设备        if (bdi.Length == 0)        {            this.ShowErrMsg("请确认您的蓝牙已开启！");            return;        }

2、打开数据流

  #region OBEXOpenStream    public bool OBEXOpenStream(string BTMAC)    {        // serial port UUID        Guid spguid = OpenNETCF.Net.Bluetooth.BluetoothService.ObexObjectPush;        OpenNETCF.Net.BluetoothAddress btaddress = OpenNETCF.Net.BluetoothAddress.Parse(BTMAC);        client = new OpenNETCF.Net.Sockets.BluetoothClient();        // define endpoint        OpenNETCF.Net.BluetoothEndPoint endpoint = new OpenNETCF.Net.BluetoothEndPoint(btaddress, spguid);        try        {            //open socket            client.Connect(endpoint);        }        catch        {            //unable to connect (server not listening on spguid)            return false;        }        //connect socket        stream = client.GetStream();        return true;    }    #endregion

3、配对连接

 private bool OBEXConnect()    {        //send client request        byte[] ConnectPacket = new byte[7];        ConnectPacket[0] = 0x80;      // Connect        ConnectPacket[1] = 0x00;      // Packetlength Hi Byte        ConnectPacket[2] = 0x07;      // Packetlength Lo Byte        ConnectPacket[3] = 0x10;      // Obex v1        ConnectPacket[4] = 0x00;      // no flags        ConnectPacket[5] = 0x20;      // 8k max packet size Hi Byte        ConnectPacket[6] = 0x00;      // 8k max packet size Lo Byte        stream.Write(ConnectPacket, 0, ConnectPacket.Length);        //listen for server response        byte[] ReceiveBufferA = new byte[3];        stream.Read(ReceiveBufferA, 0, 3);        if (ReceiveBufferA[0] == 160) // 0xa0        {            //success, decode rest of packet            int plength = (0xff * ReceiveBufferA[1]) + ReceiveBufferA[2]; //length of packet is...            //listen for rest of packet            byte[] ReceiveBufferB = new byte[plength - 3];            stream.Read(ReceiveBufferB, 0, plength - 3);            int obver = ReceiveBufferB[0]; //server obex version (16 = v1.0)            int cflags = ReceiveBufferB[1]; //connect flags            int maxpack = (0xff * ReceiveBufferB[2]) + ReceiveBufferB[3]; //max packet size            return true;        }        else        {            return false;        }    }

4、发送文本内容

   //send client request, start put                        string tName = "BRT优惠卷.txt";                        string tType = "";                        string tFileContent = "优惠卷内容:" + this.txtContent.Text.Trim();                        int result = OBEXRequest("PUT", tName, tType, tFileContent);                        if (result == 160)                        {                            SendSuccess = true;                        }

完整代码

using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Net.Sockets;using OpenNETCF;using OpenNETCF.Net;using OpenNETCF.Net.Bluetooth;using OpenNETCF.Net.Sockets;public partial class _Default : System.Web.UI.Page {    //Stream stream;    NetworkStream stream;    OpenNETCF.Net.Sockets.BluetoothClient client;    protected void Page_Load(object sender, EventArgs e){    }    #region ShowErrMsg    private void ShowErrMsg(string err){        string str;        str = "<script language='javascript'>";        str += " alert('" + err + "')";        str += "</script>";        this.RegisterStartupScript("", str);    }    #endregion    protected void btnSend_Click(object sender, EventArgs e){        if (this.txtContent.Text.Trim() == string.Empty)        {            this.ShowErrMsg("请输入发送内容！");            return;        }        BluetoothClient bc = new BluetoothClient();        BluetoothDeviceInfo[] bdi;        bdi = bc.DiscoverDevices(10);//查找周围最多10个蓝牙设备        if (bdi.Length == 0)        {            this.ShowErrMsg("请确认您的蓝牙已开启！");            return;        }        bool SendSuccess = false;        try        {            foreach (BluetoothDeviceInfo bd in bdi)            {                if (OBEXOpenStream(bd.DeviceID.ToString()))                {                    if (OBEXConnect())                    {                        //send client request, start put                        string tName = "BRT优惠卷.txt";                        string tType = "";                        string tFileContent = "优惠卷内容:" + this.txtContent.Text.Trim();                        int result = OBEXRequest("PUT", tName, tType, tFileContent);                        if (result == 160)                        {                            SendSuccess = true;                        }                    }                    OBEXCloseStream();                }                else                {                    this.ShowErrMsg("连接失败！" + bd.DeviceName.ToString());                }            }            if (SendSuccess)            {                this.ShowErrMsg("发送成功，谢谢使用！");            }        }        finally        {            OBEXCloseStream();        }    }    #region OBEXOpenStream    public bool OBEXOpenStream(string BTMAC){        // serial port UUID        Guid spguid = OpenNETCF.Net.Bluetooth.BluetoothService.ObexObjectPush;        OpenNETCF.Net.BluetoothAddress btaddress = OpenNETCF.Net.BluetoothAddress.Parse(BTMAC);        client = new OpenNETCF.Net.Sockets.BluetoothClient();        // define endpoint        OpenNETCF.Net.BluetoothEndPoint endpoint = new OpenNETCF.Net.BluetoothEndPoint(btaddress, spguid);        try        {            //open socket            client.Connect(endpoint);        }        catch        {            //unable to connect (server not listening on spguid)            return false;        }        //connect socket        stream = client.GetStream();        return true;    }    #endregion    #region OBEXCloseStream    private void OBEXCloseStream(){        if (stream != null)        {            stream.Close();        }        if (client != null)        {            client.Close();        }    }    #endregion    #region  OBEXConnect    private bool OBEXConnect(){        //send client request        byte[] ConnectPacket = new byte[7];        ConnectPacket[0] = 0x80;      // Connect        ConnectPacket[1] = 0x00;      // Packetlength Hi Byte        ConnectPacket[2] = 0x07;      // Packetlength Lo Byte        ConnectPacket[3] = 0x10;      // Obex v1        ConnectPacket[4] = 0x00;      // no flags        ConnectPacket[5] = 0x20;      // 8k max packet size Hi Byte        ConnectPacket[6] = 0x00;      // 8k max packet size Lo Byte        stream.Write(ConnectPacket, 0, ConnectPacket.Length);        //listen for server response        byte[] ReceiveBufferA = new byte[3];        stream.Read(ReceiveBufferA, 0, 3);        if (ReceiveBufferA[0] == 160) // 0xa0        {            //success, decode rest of packet            int plength = (0xff * ReceiveBufferA[1]) + ReceiveBufferA[2]; //length of packet is...            //listen for rest of packet            byte[] ReceiveBufferB = new byte[plength - 3];            stream.Read(ReceiveBufferB, 0, plength - 3);            int obver = ReceiveBufferB[0]; //server obex version (16 = v1.0)            int cflags = ReceiveBufferB[1]; //connect flags            int maxpack = (0xff * ReceiveBufferB[2]) + ReceiveBufferB[3]; //max packet size            return true;        }        else        {            return false;        }    }    #endregion    #region OBEXRequest    private int OBEXRequest(string tReqType, string tName, string tType, string tFileContent){        //send client request        int i;        int offset;        int packetsize;        byte reqtype = 0x82;        int tTypeLen = 0x03;        int typeheadsize;        int typesizeHi = 0x00;        int typesizeLo = 0x03;        //tName = "contact.vcf";        //tType = "text/x-vCard";        //tFileContent = "BEGIN:VCARD\r\nVERSION:2.1\r\nN:;aardvark\r\nFN:aardvark\r\nEND:VCARD\r\n";        if (tReqType == "GET")        {            reqtype = 0x83;      // 131 GET-Final        }        if (tReqType == "PUT")        {            reqtype = 0x82;      // 130 PUT-Final        }        packetsize = 3;        //Name Header        int tNameLength = tName.Length;        int nameheadsize = (3 + (tNameLength * 2) + 2);        int namesizeHi = (nameheadsize & 0xff00) / 0xff;        int namesizeLo = nameheadsize & 0x00ff;        packetsize = packetsize + nameheadsize;        if (tType != "")        {            //Type Header            tTypeLen = tType.Length;            typeheadsize = 3 + tTypeLen + 1;            typesizeHi = (typeheadsize & 0xff00) / 0xff;            typesizeLo = typeheadsize & 0x00ff;            packetsize = packetsize + typeheadsize;        }        //Body        int fileLen = System.Text.Encoding.Default.GetBytes(tFileContent).Length;//tFileContent.Length;        int fileheadsize = 3 + fileLen;        int filesizeHi = (fileheadsize & 0xff00) / 0xff; ;        int filesizeLo = fileheadsize & 0x00ff; ;        packetsize = packetsize + fileheadsize;        int packetsizeHi = (packetsize & 0xff00) / 0xff;        int packetsizeLo = packetsize & 0x00ff;        byte[] tSendByte = new byte[packetsize];        //PUT-final Header        tSendByte[0] = reqtype;                    // Request type e.g. PUT-final 130        tSendByte[1] = Convert.ToByte(packetsizeHi);        // Packetlength Hi        tSendByte[2] = Convert.ToByte(packetsizeLo);        // Packetlength Lo        offset = 2;        //Name Header        tSendByte[offset + 1] = 0x01;                  // HI for Name header            tSendByte[offset + 2] = Convert.ToByte(namesizeHi);      // Length of Name header (2 bytes per char)        tSendByte[offset + 3] = Convert.ToByte(namesizeLo);      // Length of Name header (2 bytes per char)        // Name+\n\n in unicode        byte[] tNameU = System.Text.Encoding.BigEndianUnicode.GetBytes(tName);        tNameU.CopyTo(tSendByte, offset + 4);        offset = offset + 3 + (tNameLength * 2);        tSendByte[offset + 1] = 0x00;                  // null term        tSendByte[offset + 2] = 0x00;                  // null term        offset = offset + 2;        if (tType != "")        {            //Type Header            tSendByte[offset + 1] = 0x42;                  // HI for Type Header 66            tSendByte[offset + 2] = Convert.ToByte(typesizeHi);      // Length of Type Header            tSendByte[offset + 3] = Convert.ToByte(typesizeLo);      // Length of Type Header            for (i = 0; i <= (tTypeLen - 1); i++)            {                tSendByte[offset + 4 + i] = Convert.ToByte(Convert.ToChar(tType.Substring(i, 1)));            }            tSendByte[offset + 3 + tTypeLen + 1] = 0x00;            // null terminator            offset = offset + 3 + tTypeLen + 1;        }        //Body        tSendByte[offset + 1] = 0x49;                  //HI End of Body 73        tSendByte[offset + 2] = Convert.ToByte(filesizeHi);      //        tSendByte[offset + 3] = Convert.ToByte(filesizeLo);      //1k payload + 3 for HI header        //for (i = 0; i <= (fileLen - 1); i++)        //{        //    tSendByte[offset + 4 + i] = Convert.ToByte(tFileContent.Substring(i, 1));//Convert.ToByte(Convert.ToChar(tFileContent.Substring(i, 1)));        //}        byte[] bfile = System.Text.Encoding.Default.GetBytes(tFileContent);        for (i = 0; i <= bfile.Length - 1; i++)        {            tSendByte[offset + 4 + i] = bfile[i];        }        //tSendByte[offset+4+fileLen] = 0x00;              // null terminator        offset = offset + 3 + fileLen;        stream.Write(tSendByte, 0, tSendByte.Length);        //listen for server response        //TODO: can hang here forever waiting response...        bool x = stream.DataAvailable; // changed bluetoothclient - public NetworkStream GetStream()        byte[] tArray4 = new byte[3];        stream.Read(tArray4, 0, 3);        x = stream.DataAvailable;        if (tArray4[0] == 160) // 0xa0        {            int plength = (tArray4[1] * 256) + tArray4[2] - 3;            byte[] tArray5 = new byte[plength];            if (plength > 0)            {                stream.Read(tArray5, 0, plength);                //TODO: data in returned packet to deal with            }            return 160;        }        if (tArray4[0] == 197) // 0xc5 Method not allowed        {            return 197;        }        if (tArray4[0] == 192) // 0xc0 Bad Request        {            return 192;        }        return 0;    }    #endregion}

C# 在PC上的通过蓝牙(bluetooth)发送数据到手机

概述

代码实现

完整代码

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