C#蓝牙连接及传输数据的三种方式（蓝牙传输文件、二进制数据） |
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C#蓝牙连接及传输数据的三种方式（蓝牙传输文件、二进制数据）
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先下载InTheHand.Net.Personal.dll并在C#中引用，这个需要在网上下载 第一种、通过ObexWebRequest传输文件先看界面
using InTheHand.Net; using InTheHand.Net.Bluetooth; using InTheHand.Net.Sockets; using InTheHand.Windows.Forms; using System; using System.Collections.Generic; using System.IO; using System.IO.Ports; using System.Net; using System.Text; using System.Threading; using System.Windows.Forms; namespace WindowsFormsApp1 { public partial class Frmbtooth : Form { BluetoothRadio radio = null;//蓝牙适配器 string sendFileName = null;//发送文件名 BluetoothAddress sendAddress = null;//发送目的地址 ObexListener listener = null;//监听器 string recDir = null;//接受文件存放目录 Thread listenThread, sendThread;//发送/接收线程 BluetoothClient Blueclient; bool isbluelisten = false; public Frmbtooth() { InitializeComponent(); radio = BluetoothRadio.PrimaryRadio;//获取当前PC的蓝牙适配器 CheckForIllegalCrossThreadCalls = false;//不检查跨线程调用 if (radio == null)//检查该电脑蓝牙是否可用 { MessageBox.Show("这个电脑蓝牙不可用！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); } else { Blueclient = new BluetoothClient(); } recDir = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); textBox1.Text = recDir; } Dictionary deviceAddresses = new Dictionary(); OpenFileDialog dialog = new OpenFileDialog(); private void button2_Click(object sender, EventArgs e) { if (dialog.ShowDialog() == DialogResult.OK) { sendFileName = dialog.FileName;//设置文件名 labelPath.Text = Path.GetFileName(sendFileName); } } private void button1_Click(object sender, EventArgs e) { SelectBluetoothDeviceDialog dialog = new SelectBluetoothDeviceDialog(); dialog.ShowRemembered = true;//显示已经记住的蓝牙设备 dialog.ShowAuthenticated = true;//显示认证过的蓝牙设备 dialog.ShowUnknown = true;//显示位置蓝牙设备 if (dialog.ShowDialog() == DialogResult.OK) { sendAddress = dialog.SelectedDevice.DeviceAddress;//获取选择的远程蓝牙地址 labelAddress.Text = "地址:" + sendAddress.ToString() + " 设备名:" + dialog.SelectedDevice.DeviceName; } } private void sendFile()//发送文件方法 { ObexWebRequest request = new ObexWebRequest(sendAddress, Path.GetFileName(sendFileName));//创建网络请求 WebResponse response = null; try { buttonSend.Enabled = false; request.ReadFile(sendFileName);//发送文件 labelInfo.Text = "开始发送!"; response = request.GetResponse();//获取回应 labelInfo.Text = "发送完成!"; } catch (System.Exception ex) { MessageBox.Show("发送失败！"+ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning); labelInfo.Text = "发送失败!"; } finally { if (response != null) { response.Close(); buttonSend.Enabled = true; } } } SerialPort BluetoothConnection = new SerialPort(); int length = 20; string BlueToothReceivedData = ""; private void button3_Click_1(object sender, EventArgs e) { sendThread = new Thread(sendFile);//开启发送文件线程 sendThread.Start(); } private void buttonListen_Click(object sender, EventArgs e) { if (listener == null || !listener.IsListening) { radio.Mode = RadioMode.Discoverable;//设置本地蓝牙可被检测 listener = new ObexListener(ObexTransport.Bluetooth);//创建监听 listener.Start(); if (listener.IsListening) { buttonListen.Text = "停止"; labelRecInfo.Text = "开始监听"; listenThread = new Thread(receiveFile);//开启监听线程 listenThread.Start(); } } else { listener.Stop(); buttonListen.Text = "监听"; labelRecInfo.Text = "停止监听"; } } private void buttonselectRecDir_Click(object sender, EventArgs e) { FolderBrowserDialog dialog = new FolderBrowserDialog(); dialog.Description = "请选择蓝牙接收文件的存放路径"; if (dialog.ShowDialog() == DialogResult.OK) { recDir = dialog.SelectedPath; labelRecDir.Text = recDir; } } private void Frmbtooth_FormClosed(object sender, FormClosedEventArgs e) { if (sendThread != null) { sendThread.Abort(); } if (listenThread != null) { listenThread.Abort(); } if (listener != null && listener.IsListening) { listener.Stop(); } } private void receiveFile()//收文件方法 { ObexListenerContext context = null; ObexListenerRequest request = null; while (listener.IsListening) { context = listener.GetContext();//获取监听上下文 if (context == null) { break; } request = context.Request;//获取请求 string uriString = Uri.UnescapeDataString(request.RawUrl);//将uri转换成字符串 string recFileName = recDir + uriString; request.WriteFile(recFileName);//接收文件 labelRecInfo.Text = "收到文件" + uriString.TrimStart(new char[] { '/' }); } } } } 这种方式优点是稳定性较强，基本无错误，就是偶尔需要提前蓝牙配对。 第二种、通过BluetoothClient传输二进制数据 using InTheHand.Net; using InTheHand.Net.Bluetooth; using InTheHand.Net.Sockets; using InTheHand.Windows.Forms; using System; using System.Collections.Generic; using System.IO; using System.IO.Ports; using System.Net; using System.Text; using System.Threading; using System.Windows.Forms; namespace WindowsFormsApp1 { public partial class Frmbtooth : Form { BluetoothRadio radio = null;//蓝牙适配器 string sendFileName = null;//发送文件名 BluetoothAddress sendAddress = null;//发送目的地址 ObexListener listener = null;//监听器 string recDir = null;//接受文件存放目录 Thread listenThread, sendThread;//发送/接收线程 BluetoothClient Blueclient; bool isbluelisten = false; public Frmbtooth() { InitializeComponent(); radio = BluetoothRadio.PrimaryRadio;//获取当前PC的蓝牙适配器 CheckForIllegalCrossThreadCalls = false;//不检查跨线程调用 if (radio == null)//检查该电脑蓝牙是否可用 { MessageBox.Show("这个电脑蓝牙不可用！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); } else { Blueclient = new BluetoothClient(); } recDir = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); textBox1.Text = recDir; } Dictionary deviceAddresses = new Dictionary(); OpenFileDialog dialog = new OpenFileDialog(); private void button2_Click(object sender, EventArgs e) { if (dialog.ShowDialog() == DialogResult.OK) { sendFileName = dialog.FileName;//设置文件名 labelPath.Text = Path.GetFileName(sendFileName); } } private void button1_Click(object sender, EventArgs e) { SelectBluetoothDeviceDialog dialog = new SelectBluetoothDeviceDialog(); dialog.ShowRemembered = true;//显示已经记住的蓝牙设备 dialog.ShowAuthenticated = true;//显示认证过的蓝牙设备 dialog.ShowUnknown = true;//显示位置蓝牙设备 if (dialog.ShowDialog() == DialogResult.OK) { sendAddress = dialog.SelectedDevice.DeviceAddress;//获取选择的远程蓝牙地址 labelAddress.Text = "地址:" + sendAddress.ToString() + " 设备名:" + dialog.SelectedDevice.DeviceName; } } SerialPort BluetoothConnection = new SerialPort(); int length = 20; string BlueToothReceivedData = ""; private void button3_Click(object sender, EventArgs e) { BluetoothClient cli = new BluetoothClient(); string strimg = dialog.FileName.ToString(); //记录图片的所在路径 FileStream fs = new FileStream(strimg.Replace(".jpg", ".dat"), FileMode.Open, FileAccess.Read); //将图片以文件流的形式进行保存 BinaryReader br = new BinaryReader(fs); byte[] imgBytesIn = br.ReadBytes((int)fs.Length);//将流读入到字节数组中 fs.Close(); br.Close(); BluetoothEndPoint ep = null; try { // [注意2]：要注意MAC地址中字节的对应关系，直接来看顺序是相反的，例如 // 如下对应的MAC地址为——12:34:56:78:9a:bc ep = new BluetoothEndPoint(sendAddress, BluetoothService.SerialPort); //ep = new BluetoothEndPoint(sendAddress, Guid.Parse("e0cbf06c-cd8b-4647-bb8a-263b43f0f974")); //ep = new BluetoothEndPoint(sendAddress, BluetoothService.Handsfree); Console.WriteLine("正在连接！"); // cli.SetPin("0000"); cli.Connect(ep); // 连接蓝牙 if (cli.Connected) { Stream peerStream = cli.GetStream(); byte[] sendData = Encoding.Default.GetBytes("人生苦短，我用python"); //peerStream.Write(imgBytesIn, 0, imgBytesIn.Length); peerStream.Write(sendData, 0, sendData.Length); // peerStream.WriteByte(0xBB); // 发送开门指令 } else { MessageBox.Show("端口1没打开"); } } catch (Exception ex) { Console.WriteLine(ex.Message); } finally { if (cli != null) { // [注意3]：要延迟一定时间(例如1000毫秒) //避免因连接后又迅速断开而导致蓝牙进入异常(傻逼)状态 Thread.Sleep(1000); cli.Close(); } } } private void Frmbtooth_FormClosed(object sender, FormClosedEventArgs e) { if (sendThread != null) { sendThread.Abort(); } if (listenThread != null) { listenThread.Abort(); } if (listener != null && listener.IsListening) { listener.Stop(); } } public void bluelisten() { BluetoothListener bluetoothListener = null; Guid mGUID2 = Guid.Parse("00001101-0000-1000-8000-00805F9B34FB");//蓝牙串口服务的uuiid bluetoothListener = new BluetoothListener(mGUID2); bluetoothListener.Start();//开始监听 Console.WriteLine("开始监听"); while (isbluelisten) { var bl = bluetoothListener.AcceptBluetoothClient();//接收 byte[] buffer = new byte[100]; Stream peerStream = bl.GetStream(); peerStream.Read(buffer, 0, buffer.Length); //string data = Encoding.UTF8.GetString(buffer).ToString() ;//去掉后面的字节 Console.WriteLine(buffer); } bluetoothListener.Stop(); } private void button6_Click(object sender, EventArgs e) { if (!isbluelisten) { isbluelisten = true; radio.Mode = RadioMode.Discoverable;//设置本地蓝牙可被检测 button6.Text = "停止"; labelRecInfo.Text = "开始监听"; listenThread = new Thread(bluelisten);//开启监听线程 listenThread.Start(); } else { button6.Text = "配对监听"; labelRecInfo.Text = "停止监听"; isbluelisten = false; } } } }这种方式直接与蓝牙设备进行配对的时候会报错，请求的地址无效，这时候需要在被检测的蓝牙设备开启BluetoothListener 默认UUID是"00001101-0000-1000-8000-00805F9B34FB"即蓝牙串口服务的UUID。 手机设备开启蓝牙服务可以下载“蓝牙串口”应用，打开蓝牙服务串口。 第三种、通过蓝牙串口方式传输二进制数据需要在电脑蓝牙设置中添加蓝牙串口，传入传出两个方向的蓝牙串口都需要有，传出串口配置的时候需要让被测蓝牙设备打开蓝牙服务串口（也就是上一种方法中的bluelisten函数，开启蓝牙监听）才可以连接。
就这样，有问题评论区留言。 |
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