获取USB设备的端口

Question

我刚将一些代码从xp移植到Windows 8.1。在xp上运行时，我的代码可以检测usb设备并确定com端口。看来这在Windows 8.1中已经发生了变化。

要获取xp中的com端口，我会使用以下方法：

private void SetComPort()
{

    ManagementObjectSearcher searcher = new ManagementObjectSearcher("root\\WMI", "SELECT * FROM MSSerial_PortName");

    foreach (ManagementObject queryObj in searcher.Get())
    {
        Console.WriteLine("-----------------------------------");
        Console.WriteLine("Detected PortName: {0}", queryObj["PortName"]);
        Console.WriteLine("Driver Name: {0}", queryObj["InstanceName"]);

        if (queryObj["InstanceName"].ToString().Contains(_driver))
        {

            _comPort = queryObj["PortName"].ToString();
        }

        if (queryObj["InstanceName"].ToString().Contains("USB") || queryObj["InstanceName"].ToString().Contains(_driver))
        {
            Console.WriteLine(queryObj["PortName"] + " is a USB to SERIAL adapter/converter");
        }
    }
}

在8.1 searcher.Get()中运行此代码会返回0个对象。所以我搜索并找到以下代码，列出所有设备，但不是com端口：

private List<USBDeviceInfo> GetUSBDevices()
{
        List<USBDeviceInfo> devices = new List<USBDeviceInfo>();

        var searcher = new ManagementObjectSearcher("root\\cimv2", @"Select * From Win32_USBHub");

        foreach (var device in searcher.Get())
        {
            devices.Add(new USBDeviceInfo(
            (String)device.GetPropertyValue("DeviceID"),
            (String)device.GetPropertyValue("PNPDeviceID"),
            (String)device.GetPropertyValue("Description"),
            (String)device.GetPropertyValue("Name")
            ));
        }

        return devices;

}

如何通过DeviceID确定端口？