如何在 C# 中使用 32feet 获取 COM 端口？

Question

如何获得通过蓝牙棒连接移动设备的 COM 端口？我已经可以得到设备的名称，例如。 'Nokia C2-01' 和 device.DeviceName 使用 32feet library 但我怎样才能让它看起来像这样？ "Nokia c2-01 connected through COM7"?

Answer 1

首先，您需要使用以下方式获取设备地址：

string comPort = GetBluetoothPort(device.DeviceAddress.ToString());
if(!string.IsNullOrWhiteSpace(comPort))
{
     // enter desired output here
}

GetBluetoothPort() 方法如下所示：

using System.Management;
private string GetBluetoothPort(string deviceAddress)
    {
        const string Win32_SerialPort = "Win32_SerialPort";
        SelectQuery q = new SelectQuery(Win32_SerialPort);
        ManagementObjectSearcher s = new ManagementObjectSearcher(q);
        foreach (object cur in s.Get())
        {
            ManagementObject mo = (ManagementObject)cur;
            string pnpId = mo.GetPropertyValue("PNPDeviceID").ToString();

            if (pnpId.Contains(deviceAddress))
            {
                object captionObject = mo.GetPropertyValue("Caption");
                string caption = captionObject.ToString();
                int index = caption.LastIndexOf("(COM");
                if (index > 0)
                {
                    string portString = caption.Substring(index);
                    string comPort = portString.
                                  Replace("(", string.Empty).Replace(")", string.Empty);
                    return comPort;
                }
            }              
        }
        return null;
    }

这将返回端口名称，即 COM7