Windows系統(tǒng)中使用C#編寫藍牙通信程序的簡單實例

來源：本站原創(chuàng)|時間：2020-01-10|欄目：C#教程|點擊：次

現(xiàn)在很多電腦提供了藍牙支持，很多筆記本網(wǎng)卡也集成了藍牙功能，也可以采用USB藍牙方便的連接手機等藍牙設備進行通信。
操作藍牙要使用類庫InTheHand.Net.Personal
首先在項目中引用該類庫；

static void Main(string[] args) 
{ 
  BluetoothRadio bluetoothRadio = BluetoothRadio.PrimaryRadio; 
  if (bluetoothRadio == null) 
  { 
  Console.WriteLine("沒有找到本機藍牙設備!"); 
  } 
  else 
  { 
  Console.WriteLine("ClassOfDevice: " + bluetoothRadio.ClassOfDevice); 
  Console.WriteLine("HardwareStatus: " + bluetoothRadio.HardwareStatus); 
  Console.WriteLine("HciRevision: " + bluetoothRadio.HciRevision); 
  Console.WriteLine("HciVersion: " + bluetoothRadio.HciVersion); 
  Console.WriteLine("LmpSubversion: " + bluetoothRadio.LmpSubversion); 
  Console.WriteLine("LmpVersion: " + bluetoothRadio.LmpVersion); 
  Console.WriteLine("LocalAddress: " + bluetoothRadio.LocalAddress); 
  Console.WriteLine("Manufacturer: " + bluetoothRadio.Manufacturer); 
  Console.WriteLine("Mode: " + bluetoothRadio.Mode); 
  Console.WriteLine("Name: " + bluetoothRadio.Name); 
  Console.WriteLine("Remote:" + bluetoothRadio.Remote); 
  Console.WriteLine("SoftwareManufacturer: " + bluetoothRadio.SoftwareManufacturer); 
  Console.WriteLine("StackFactory: " + bluetoothRadio.StackFactory); 
  } 
  Console.ReadKey(); 
}

如果PC插入了藍牙適配器，便會顯示藍牙相關信息：

然后我們就要利用藍牙收發(fā)文件了：
前提是藍牙設備(如手機)已經(jīng)和PC配對了

public partial class Form1 : Form 
{ 
  BluetoothRadio radio = null;//藍牙適配器 
  string sendFileName = null;//發(fā)送文件名 
  BluetoothAddress sendAddress = null;//發(fā)送目的地址 
  ObexListener listener = null;//監(jiān)聽器 
  string recDir = null;//接受文件存放目錄 
  Thread listenThread, sendThread;//發(fā)送/接收線程 
 
  public Form1() 
  { 
    InitializeComponent(); 
    radio = BluetoothRadio.PrimaryRadio;//獲取當前PC的藍牙適配器 
    CheckForIllegalCrossThreadCalls = false;//不檢查跨線程調(diào)用 
    if (radio == null)//檢查該電腦藍牙是否可用 
    { 
      MessageBox.Show("這個電腦藍牙不可用！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); 
    } 
    recDir = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); 
    labelRecDir.Text = recDir; 
  } 
 
  private void buttonSelectBluetooth_Click(object sender, EventArgs e)//選擇遠程藍牙設備 
  { 
    SelectBluetoothDeviceDialog dialog = new SelectBluetoothDeviceDialog(); 
    dialog.ShowRemembered = true;//顯示已經(jīng)記住的藍牙設備 
    dialog.ShowAuthenticated = true;//顯示認證過的藍牙設備 
    dialog.ShowUnknown = true;//顯示位置藍牙設備 
    if (dialog.ShowDialog() == DialogResult.OK) 
    { 
      sendAddress = dialog.SelectedDevice.DeviceAddress;//獲取選擇的遠程藍牙地址 
      labelAddress.Text = "地址:" + sendAddress.ToString() + "  設備名:" + dialog.SelectedDevice.DeviceName; 
    } 
  } 
 
  private void buttonSelectFile_Click(object sender, EventArgs e)//選擇要發(fā)送的本地文件 
  { 
    OpenFileDialog dialog = new OpenFileDialog(); 
    if (dialog.ShowDialog() == DialogResult.OK) 
    { 
      sendFileName = dialog.FileName;//設置文件名 
      labelPath.Text = Path.GetFileName(sendFileName); 
    } 
  } 
 
  private void buttonSend_Click(object sender, EventArgs e)//發(fā)送按鈕 
  { 
    sendThread = new Thread(sendFile);//開啟發(fā)送文件線程 
    sendThread.Start(); 
  } 
 
  private void sendFile()//發(fā)送文件方法 
  { 
    ObexWebRequest request = new ObexWebRequest(sendAddress, Path.GetFileName(sendFileName));//創(chuàng)建網(wǎng)絡請求 
    WebResponse response = null; 
    try 
    { 
      buttonSend.Enabled = false; 
      request.ReadFile(sendFileName);//發(fā)送文件 
      labelInfo.Text = "開始發(fā)送!"; 
      response = request.GetResponse();//獲取回應 
      labelInfo.Text = "發(fā)送完成!"; 
    } 
    catch (System.Exception ex) 
    { 
      MessageBox.Show("發(fā)送失?。?, "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning); 
      labelInfo.Text = "發(fā)送失敗!"; 
    } 
    finally 
    { 
      if (response != null) 
      { 
        response.Close(); 
        buttonSend.Enabled = true; 
      } 
    } 
  } 
 
  private void buttonselectRecDir_Click(object sender, EventArgs e)//選擇接受目錄 
  { 
    FolderBrowserDialog dialog = new FolderBrowserDialog(); 
    dialog.Description = "請選擇藍牙接收文件的存放路徑"; 
    if (dialog.ShowDialog() == DialogResult.OK) 
    { 
      recDir = dialog.SelectedPath; 
      labelRecDir.Text = recDir; 
    } 
  } 
 
  private void buttonListen_Click(object sender, EventArgs e)//開始/停止監(jiān)聽 
  { 
    if (listener == null || !listener.IsListening) 
    { 
      radio.Mode = RadioMode.Discoverable;//設置本地藍牙可被檢測 
      listener = new ObexListener(ObexTransport.Bluetooth);//創(chuàng)建監(jiān)聽 
      listener.Start(); 
      if (listener.IsListening) 
      { 
        buttonListen.Text = "停止"; 
        labelRecInfo.Text = "開始監(jiān)聽"; 
        listenThread = new Thread(receiveFile);//開啟監(jiān)聽線程 
        listenThread.Start(); 
      } 
    } 
    else 
    {  
      listener.Stop(); 
      buttonListen.Text = "監(jiān)聽"; 
      labelRecInfo.Text = "停止監(jiān)聽"; 
    } 
  } 
 
  private void receiveFile()//收文件方法 
  { 
    ObexListenerContext context = null; 
    ObexListenerRequest request = null; 
    while (listener.IsListening) 
    { 
      context = listener.GetContext();//獲取監(jiān)聽上下文 
      if (context == null) 
      { 
        break; 
      } 
      request = context.Request;//獲取請求 
      string uriString = Uri.UnescapeDataString(request.RawUrl);//將uri轉(zhuǎn)換成字符串 
      string recFileName = recDir + uriString; 
      request.WriteFile(recFileName);//接收文件 
      labelRecInfo.Text = "收到文件" + uriString.TrimStart(new char[] { '/' }); 
    } 
  } 
 
  private void Form1_FormClosed(object sender, FormClosedEventArgs e) 
  { 
    if (sendThread != null) 
    { 
      sendThread.Abort(); 
    } 
    if (listenThread != null) 
    { 
      listenThread.Abort(); 
    } 
    if (listener != null && listener.IsListening) 
    { 
      listener.Stop(); 
    } 
  } 
}

程序界面：

SelectBluetoothDeviceDialog是一個InTheHand.Net.Personal提供的窗體，用于選擇藍牙設備：

從手機往電腦發(fā)送文件需要在電腦上開啟監(jiān)聽ObexListener，才能收到文件。

核心代碼：

BluetoothRadio radio = null;//藍牙適配器 
string sendFileName = null;//發(fā)送文件名 
BluetoothAddress sendAddress = null;//發(fā)送目的地址 
ObexListener listener = null;//監(jiān)聽器 
string recDir = null;//接受文件存放目錄 
Thread listenThread, sendThread;//發(fā)送/接收線程 
 
radio = BluetoothRadio.PrimaryRadio;//獲取當前PC的藍牙適配器 
 
//關于藍牙設備選擇對話框 
SelectBluetoothDeviceDialog dialog = new SelectBluetoothDeviceDialog(); 
dialog.ShowRemembered = true;//顯示已經(jīng)記住的藍牙設備 
dialog.ShowAuthenticated = true;//顯示認證過的藍牙設備 
dialog.ShowUnknown = true;//顯示位置藍牙設備 
sendAddress = dialog.SelectedDevice.DeviceAddress;//獲取選擇的遠程藍牙地址 
 
//發(fā)送文件操作 
ObexWebRequest request = new ObexWebRequest(sendAddress, Path.GetFileName(sendFileName));//創(chuàng)建網(wǎng)絡請求 
WebResponse response = null; 
request.ReadFile(sendFileName);//發(fā)送文件 
response = request.GetResponse();//獲取回應 
response.Close(); 
 
//接收文件 
radio.Mode = RadioMode.Discoverable;//設置本地藍牙可被檢測 
listener = new ObexListener(ObexTransport.Bluetooth);//創(chuàng)建監(jiān)聽 
listener.Start(); 
listener.Stop(); 
 
ObexListenerContext context = null; 
ObexListenerRequest request = null; 
context = listener.GetContext();//獲取監(jiān)聽上下文 
request = context.Request;//獲取請求 
string uriString = Uri.UnescapeDataString(request.RawUrl);//將uri轉(zhuǎn)換成字符串 
string recFileName = recDir + uriString; 
request.WriteFile(recFileName);//接收文件 
labelRecInfo.Text = "收到文件" + uriString.TrimStart(new char[] { '/' }

PS：關于InTheHand.Net.Personal
InTheHand.Net.Personal.dll來源于32feet.NET。
32feet.NET是shared-source的項目，支持CF.net 2.0以及桌面版本.NET framework，提供短距離領域(personal area networking technologie)的通信功能，支持bluetooth，Infrared(IrDA)紅外等. 想了解更多的信息可以參考其官方主頁，其項目的安裝包和源碼是放在微軟的開源工程網(wǎng)站CodePlex上面的，作為.NET開發(fā)人員我們必須要上的網(wǎng)站就是CodePlex~

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