Windows系统中使用C#编写蓝牙通信程序的简单实例

现在很多电脑提供了蓝牙支持，很多笔记本网卡也集成了蓝牙功能，也可以采用usb蓝牙方便的连接手机等蓝牙设备进行通信。
操作蓝牙要使用类库inthehand.net.personal
首先在项目中引用该类库；

static void main(string[] args) 
{ 
  bluetoothradio bluetoothradio = bluetoothradio.primaryradio; 
  if (bluetoothradio == null) 
  { 
  console.writeline("没有找到本机蓝牙设备!"); 
  } 
  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插入了蓝牙适配器，便会显示蓝牙相关信息：

 然后我们就要利用蓝牙收发文件了：
前提是蓝牙设备(如手机)已经和pc配对了

public partial class form1 : 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 
 
  public form1() 
  { 
    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); 
    } 
    recdir = environment.getfolderpath(environment.specialfolder.desktop); 
    labelrecdir.text = recdir; 
  } 
 
  private void buttonselectbluetooth_click(object sender, eventargs e)//选择远程蓝牙设备 
  { 
    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 buttonselectfile_click(object sender, eventargs e)//选择要发送的本地文件 
  { 
    openfiledialog dialog = new openfiledialog(); 
    if (dialog.showdialog() == dialogresult.ok) 
    { 
      sendfilename = dialog.filename;//设置文件名 
      labelpath.text = path.getfilename(sendfilename); 
    } 
  } 
 
  private void buttonsend_click(object sender, eventargs e)//发送按钮 
  { 
    sendthread = new thread(sendfile);//开启发送文件线程 
    sendthread.start(); 
  } 
 
  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！", "提示", messageboxbuttons.ok, messageboxicon.warning); 
      labelinfo.text = "发送失败!"; 
    } 
    finally 
    { 
      if (response != null) 
      { 
        response.close(); 
        buttonsend.enabled = true; 
      } 
    } 
  } 
 
  private void buttonselectrecdir_click(object sender, eventargs e)//选择接受目录 
  { 
    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 buttonlisten_click(object sender, eventargs e)//开始/停止监听 
  { 
    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 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[] { '/' }); 
    } 
  } 
 
  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是一个inthehand.net.personal提供的窗体，用于选择蓝牙设备：

从手机往电脑发送文件需要在电脑上开启监听obexlistener，才能收到文件。

核心代码：

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 
 
radio = bluetoothradio.primaryradio;//获取当前pc的蓝牙适配器 
 
//关于蓝牙设备选择对话框 
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 
sendaddress = dialog.selecteddevice.deviceaddress;//获取选择的远程蓝牙地址 
 
//发送文件操作 
obexwebrequest request = new obexwebrequest(sendaddress, path.getfilename(sendfilename));//创建网络请求 
webresponse response = null; 
request.readfile(sendfilename);//发送文件 
response = request.getresponse();//获取回应 
response.close(); 
 
//接收文件 
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(); 
listener.stop(); 
 
obexlistenercontext context = null; 
obexlistenerrequest request = null; 
context = listener.getcontext();//获取监听上下文 
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[] { '/' } 

ps：关于inthehand.net.personal
inthehand.net.personal.dll来源于32feet.net。
32feet.net是shared-source的项目，支持cf.net 2.0以及桌面版本.net framework，提供短距离领域(personal area networking technologie)的通信功能，支持bluetooth，infrared(irda)红外等. 想了解更多的信息可以参考其 官方主页，其项目的安装包和源码是放在微软的开源工程网站codeplex上面的，作为.net开发人员我们必须要上的网站就是codeplex~