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~
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