使用 VID 和 PID 识别连接到 x64 的 USB 设备的 COM 端口 [英] Identify COM port using VID and PID for USB device attached to x64

问题描述

如下所示，我可以通过给定的 pid 和 vid 获取连接到 32 位 win7OS 机器的 USB com 端口名称，但是在 x64 中运行时，它卡在以下行中:

As following i able to get usb com port names attached to 32bit win7OS machine, by given pid and vid,but when running in x64 it stuck in the following line:

comports.Add((string)rk6.GetValue("PortName"));

这是我的代码

static List<string> ComPortNames(String VID, String PID)
    {
        String pattern = String.Format("^VID_{0}.PID_{1}", VID, PID);
        Regex _rx = new Regex(pattern, RegexOptions.IgnoreCase);
        List<string> comports = new List<string>();

        RegistryKey rk1 = Registry.LocalMachine;
        RegistryKey rk2 = rk1.OpenSubKey("SYSTEM\CurrentControlSet\Enum");

        foreach (String s3 in rk2.GetSubKeyNames())
        {

            RegistryKey rk3 = rk2.OpenSubKey(s3);
            foreach (String s in rk3.GetSubKeyNames())
            {
                if (_rx.Match(s).Success)
                {
                    RegistryKey rk4 = rk3.OpenSubKey(s);
                    foreach (String s2 in rk4.GetSubKeyNames())
                    {
                        RegistryKey rk5 = rk4.OpenSubKey(s2);
                        RegistryKey rk6 = rk5.OpenSubKey("Device Parameters");
                        comports.Add((string)rk6.GetValue("PortName"));
                    }
                }
            }
        }
        return comports;
    }

实际代码获取这里，那么如何在 x64 中获取 com 端口名称，有什么建议吗?

actual code get here, So how to get com port names in x64, any suggestion?

推荐答案

通过阅读您的代码，我发现您在注册表中查看的当前路径不包含任何有关端口的信息.但是我通过做这个小改动找到了一种阅读方式:

By reading your code, I found out that the current path you're looking at in registry does not contain any information about ports. But I found a way to read it by doing this little change:

    static List<string> ComPortNames(String VID, String PID)
    {
        String pattern = String.Format("^VID_{0}.PID_{1}", VID, PID);
        Regex _rx = new Regex(pattern, RegexOptions.IgnoreCase);
        List<string> comports = new List<string>();

        RegistryKey rk1 = Registry.LocalMachine;
        RegistryKey rk2 = rk1.OpenSubKey("SYSTEM\CurrentControlSet\Enum");

        foreach (String s3 in rk2.GetSubKeyNames())
        {

            RegistryKey rk3 = rk2.OpenSubKey(s3);
            foreach (String s in rk3.GetSubKeyNames())
            {
                if (_rx.Match(s).Success)
                {
                    RegistryKey rk4 = rk3.OpenSubKey(s);
                    foreach (String s2 in rk4.GetSubKeyNames())
                    {
                        RegistryKey rk5 = rk4.OpenSubKey(s2);
                        string location = (string)rk5.GetValue("LocationInformation");
                        if (!String.IsNullOrEmpty(location))
                        {
                            string port = location.Substring(location.IndexOf('#') + 1, 4).TrimStart('0');
                            if (!String.IsNullOrEmpty(port)) comports.Add(String.Format("COM{0:####}", port));
                        }
                        //RegistryKey rk6 = rk5.OpenSubKey("Device Parameters");
                        //comports.Add((string)rk6.GetValue("PortName"));
                    }
                }
            }
        }
        return comports;
    }

它确实工作得很好.顺便说一句，感谢您的代码......它对我帮助很大！

It did work perfectly. Thank you for your code, by the way... It helped me a lot!

这篇关于使用 VID 和 PID 识别连接到 x64 的 USB 设备的 COM 端口的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！