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114 个问题
winfrom 中采用Windows.Devices.Bluetooth来实现连接nordic蓝牙设备(52840),连接成功后,我无法断开已经连接的设备?很奇怪官方文档没有断开的说明,找不到任何相关断开低功率设备的文档代码,能找到的只有device.Dispose();但是毫无作用?为什么是因为win api底层问题吗?
你好
欢迎来到微软问答!
推荐你使用 win32 API DeviceIoControl 中的 IOCTL_BTH_DISCONNECT_DEVICE IOCTL 来断开蓝牙连接。
你可以参考一下以下代码。我没有设备测试,你可以尝试一下。
// Define the IOCTL code for disconnecting a Bluetooth device
const int IOCTL_BTH_DISCONNECT_DEVICE = 0x41000c;
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern bool DeviceIoControl(IntPtr hDevice, uint dwIoControlCode,
IntPtr lpInBuffer, uint nInBufferSize,
IntPtr lpOutBuffer, uint nOutBufferSize,
ref uint lpBytesReturned, IntPtr lpOverlapped);
static void Main()
{
// Replace this with the actual Bluetooth address of your target device
ulong remoteDeviceAddress = /* Your target device's address */;
IntPtr hDevice = IntPtr.Zero;
try
{
hDevice = CreateFile("\\\\.\\BthModem", FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, 0, IntPtr.Zero);
if (hDevice != IntPtr.Zero)
{
uint bytesReturned = 0;
bool success = DeviceIoControl(hDevice, IOCTL_BTH_DISCONNECT_DEVICE,
Marshal.AllocHGlobal(sizeof(ulong)), sizeof(ulong),
IntPtr.Zero, 0, ref bytesReturned, IntPtr.Zero);
if (success)
{
Console.WriteLine("Bluetooth device disconnected successfully.");
}
else
{
Console.WriteLine("Failed to disconnect the Bluetooth device.");
}
}
else
{
Console.WriteLine("Error opening the Bluetooth device.");
}
}
finally
{
if (hDevice != IntPtr.Zero)
{
CloseHandle(hDevice);
}
}
}
[DllImport("kernel32.dll", SetLastError = true)]
static extern IntPtr CreateFile(string lpFileName, FileAccess dwDesiredAccess,
FileShare dwShareMode, IntPtr lpSecurityAttributes, FileMode dwCreationDisposition,
uint dwFlagsAndAttributes, IntPtr hTemplateFile);
[DllImport("kernel32.dll", SetLastError = true)]
static extern bool CloseHandle(IntPtr hObject);
谢谢。
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