使用VID和PID为连接到x64的USB设备识别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，通过给定的pid和vid，我能够将USB com端口名称附加到32位win7OS计算机上，但是在x64中运行时，它停留在以下行中：

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;
    }

实际代码获取此处，那么如何在x64中获取com端口名，有什么建议？ / p>

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

推荐答案

通过阅读代码，我发现您正在注册表中查看的当前路径不包含有关端口的任何信息。
但是我找到了一种方法，可以做一些小的改动来读取它：

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;
    }

它确实运行良好。
顺便说一句，谢谢您的代码...这对我很有帮助！

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为连接到x64的USB设备识别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！