protected IntPtr WindowProcHandler(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
MessageType msgType = (MessageType)msg;
Console.WriteLine(msgType);
if (msg == (int)MessageType.WM_DEVICECHANGE)
{
DeviceBroadcastType dbt = (DeviceBroadcastType)wParam.ToInt32();
Console.WriteLine(dbt);
switch (dbt)
{
case DeviceBroadcastType.DBT_DEVICEARRIVAL:
case DeviceBroadcastType.DBT_DEVICEREMOVECOMPLETE:
Console.WriteLine(dbt == DeviceBroadcastType.DBT_DEVICEARRIVAL ? "Device Arrival" : "Device Move Complete");
DEV_BROADCAST_HDR hdr = Marshal.PtrToStructure <DEV_BROADCAST_HDR>(lParam);
Console.WriteLine("{0}", hdr);
if (hdr.dbch_devicetype == DeviceType.DBT_DEVTYP_PORT)
{
DEV_BROADCAST_PORT port = Marshal.PtrToStructure <DEV_BROADCAST_PORT>(lParam);
Console.WriteLine(port);
}
if (hdr.dbch_devicetype == DeviceType.DBT_DEVTYP_VOLUME)
{
DEV_BROADCAST_VOLUME volume = Marshal.PtrToStructure <DEV_BROADCAST_VOLUME>(lParam);
Console.WriteLine(volume);
}
break;
default:
break;
}
handled = true;
}
return(IntPtr.Zero);
}
/// <summary>
/// 串口设备热插拔自动重新连接
/// <para>使用 HwndSource Hook Window Message #WM_DEVICECHANGE 事件监听模式</para>
/// </summary>
/// <param name="serialPort"></param>
/// <param name="window">IsLoaded 为 True 的窗口对象</param>
public static void AutoReconnection(this SerialPort serialPort, System.Windows.Window window)
{
if (serialPort == null || window == null)
{
throw new ArgumentException("参数不能为空");
}
if (!window.IsLoaded)
{
throw new InvalidOperationException("Window 对象 IsLoaded 为 True 时才能获取窗口句柄");
}
SpaceCGUtils.Log.InfoFormat("HwndSource Hook Window Message #WM_DEVICECHANGE Event Listen SerialPort Name:{0}", serialPort.PortName);
HwndSource hwndSource = HwndSource.FromVisual(window) as HwndSource;
if (hwndSource != null)
{
hwndSource.AddHook((IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) =>
{
MessageType mt = (MessageType)msg;
if (mt != MessageType.WM_DEVICECHANGE)
{
return(IntPtr.Zero);
}
DeviceBroadcastType dbt = (DeviceBroadcastType)wParam.ToInt32();
if (dbt == DeviceBroadcastType.DBT_DEVICEARRIVAL || dbt == DeviceBroadcastType.DBT_DEVICEREMOVECOMPLETE)
{
DEV_BROADCAST_HDR hdr = (DEV_BROADCAST_HDR)Marshal.PtrToStructure(lParam, typeof(DEV_BROADCAST_HDR));
if (hdr.dbch_devicetype != DeviceType.DBT_DEVTYP_PORT)
{
return(IntPtr.Zero);
}
DEV_BROADCAST_PORT port = (DEV_BROADCAST_PORT)Marshal.PtrToStructure(lParam, typeof(DEV_BROADCAST_PORT));
if (port.dbcp_name.ToUpper() != serialPort.PortName.ToUpper())
{
return(IntPtr.Zero);
}
if (dbt == DeviceBroadcastType.DBT_DEVICEARRIVAL)
{
if (!serialPort.IsOpen)
{
serialPort.Open();
}
SpaceCGUtils.Log.InfoFormat("Device Arrival SerialPort Name:{0}", port.dbcp_name);
}
if (dbt == DeviceBroadcastType.DBT_DEVICEREMOVECOMPLETE)
{
if (serialPort.IsOpen)
{
serialPort.Close();
}
SpaceCGUtils.Log.ErrorFormat("Device Remove Complete SerialPort Name:{0}", port.dbcp_name);
}
handled = true;
}
return(IntPtr.Zero);
});
}
window.Closing += (s, e) =>
{
hwndSource?.Dispose();
hwndSource = null;
};
}
