/// <summary>
/// 检测USB串口的拔插
/// </summary>
/// <param name="m"></param>
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_DEVICE_CHANGE) // 捕获USB设备的拔出消息WM_DEVICECHANGE
{
switch (m.WParam.ToInt32())
{
case DBT_DEVICE_REMOVE_COMPLETE: // USB拔出
DEV_BROADCAST_HDR dbhdr0 = (DEV_BROADCAST_HDR)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_HDR));
if (dbhdr0.dbch_devicetype == DBT_DEVTYP_PORT)
{
string portName = Marshal.PtrToStringUni((IntPtr)(m.LParam.ToInt32() + Marshal.SizeOf(typeof(DEV_BROADCAST_PORT_Fixed))));
LogHelper.LibraryLogger.Instance.WriteLog(LogHelper.LibraryLogger.libLogLevel.Error, "串口掉线，串口号:" + portName);
}
break;
case DBT_DEVICEARRIVAL: // USB插入获取对应串口名称
DEV_BROADCAST_HDR dbhdr = (DEV_BROADCAST_HDR)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_HDR));
if (dbhdr.dbch_devicetype == DBT_DEVTYP_PORT)
{
string portName = Marshal.PtrToStringUni((IntPtr)(m.LParam.ToInt32() + Marshal.SizeOf(typeof(DEV_BROADCAST_PORT_Fixed))));
LogHelper.LibraryLogger.Instance.WriteLog(LogHelper.LibraryLogger.libLogLevel.Error, "串口接入，串口号:" + portName);
}
break;
}
}
if (m.Msg == WM_SYSCOMMAND && ((int)m.WParam == SC_CLOSE))
{
// 点击winform右上关闭按钮 f
// 加入想要的逻辑处理
ExitForm exit = new ExitForm();
DialogResult dr = exit.ShowDialog();
if (dr == DialogResult.OK)
{
isStop = true;
closeCom();
timer1.Stop();
Application.Exit();
}
else if (dr == DialogResult.Yes)
{
// 改关闭效果为最小化
this.WindowState = FormWindowState.Minimized;
this.Hide();
return;
}
else if (dr == DialogResult.Cancel)
{
return;
}
}
base.WndProc(ref m);
}
