C# 使用连接到x64的USB设备的VID和PID标识COM端口
如下所示,通过给定的pid和vid,我能够获得连接到32位win7OS机器的usb com端口名,但在x64中运行时,它卡在以下行中:C# 使用连接到x64的USB设备的VID和PID标识COM端口,c#,usb,64-bit,usbserial,C#,Usb,64 Bit,Usbserial,如下所示,通过给定的pid和vid,我能够获得连接到32位win7OS机器的usb com端口名,但在x64中运行时,它卡在以下行中: comports.Add((string)rk6.GetValue("PortName")); 这是我的密码 static List<string> ComPortNames(String VID, String PID) { String pattern = String.Format("^VID_{0}.PID_{1}"
comports.Add((string)rk6.GetValue("PortName"));
这是我的密码
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;
}
静态列表组件名(字符串VID、字符串PID)
{
字符串模式=String.Format(“^VID{0}.PID{1}”,VID,PID);
正则表达式_rx=新正则表达式(模式,RegexOptions.IgnoreCase);
List comports=新列表();
RegistryKey rk1=Registry.LocalMachine;
注册表项rk2=rk1.OpenSubKey(“系统\\CurrentControlSet\\Enum”);
foreach(rk2.GetSubKeyNames()中的字符串s3)
{
注册表项rk3=rk2.OpenSubKey(s3);
foreach(rk3.GetSubKeyNames()中的字符串s)
{
如果(接收匹配成功)
{
注册表项rk4=rk3.OpenSubKey;
foreach(rk4.GetSubKeyNames()中的字符串s2)
{
注册表项rk5=rk4.OpenSubKey(s2);
注册表项rk6=rk5.OpenSubKey(“设备参数”);
Add((字符串)rk6.GetValue(“端口名”);
}
}
}
}
返回组件;
}
实际代码获取,那么如何在x64中获取com端口名,有什么建议吗?我认为这可能是比直接读取注册表更好的方法
以下是虚拟COM端口。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。 但我找到了一种阅读它的方法,做了一点小小的改变:
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;
}
静态列表组件名(字符串VID、字符串PID)
{
字符串模式=String.Format(“^VID{0}.PID{1}”,VID,PID);
正则表达式_rx=新正则表达式(模式,RegexOptions.IgnoreCase);
List comports=新列表();
RegistryKey rk1=Registry.LocalMachine;
注册表项rk2=rk1.OpenSubKey(“系统\\CurrentControlSet\\Enum”);
foreach(rk2.GetSubKeyNames()中的字符串s3)
{
注册表项rk3=rk2.OpenSubKey(s3);
foreach(rk3.GetSubKeyNames()中的字符串s)
{
如果(接收匹配成功)
{
注册表项rk4=rk3.OpenSubKey;
foreach(rk4.GetSubKeyNames()中的字符串s2)
{
注册表项rk5=rk4.OpenSubKey(s2);
字符串位置=(字符串)rk5.GetValue(“位置信息”);
如果(!String.IsNullOrEmpty(位置))
{
字符串端口=location.Substring(location.IndexOf('#')+1,4).TrimStart('0');
if(!String.IsNullOrEmpty(port))comports.Add(String.Format(“COM{0:######}”,port));
}
//注册表项rk6=rk5.OpenSubKey(“设备参数”);
//Add((字符串)rk6.GetValue(“端口名”);
}
}
}
}
返回组件;
}
它确实工作得很好。
谢谢你的代码,顺便说一下。。。这对我帮助很大 当我在Windows 10 x64下测试答案时,我得到了一些奇怪的结果,并查看了我机器上的注册表,
位置信息
键包含字符串,如端口0002.Hub#0003
,因此它们与设备连接的USB集线器/端口相关,而不是与设备分配的COM端口相关窗户
因此,在我的例子中,我得到了COM2,它是我主板上的一个硬件端口,它跳过了我期望的COM5端口,但它位于PortName
注册表项下。我不确定自您使用的Windows版本以来是否发生了变化,但我认为您的主要问题可能是没有检查键上的空值
以下稍作修改的版本似乎可以在各种Windows 7/10和x32/64系统上正常工作,我还添加了一个用于检查SerialPort.GetPortNames()
,以确保设备可用并在返回之前插入系统:
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");
RegistryKey rk6 = rk5.OpenSubKey("Device Parameters");
string portName = (string)rk6.GetValue("PortName");
if (!String.IsNullOrEmpty(portName) && SerialPort.GetPortNames().Contains(portName))
comports.Add((string)rk6.GetValue("PortName"));
}
}
}
}
return comports;
}
静态列表组件名(字符串VID、字符串PID)
{
字符串模式=String.Format(“^VID{0}.PID{1}”,VID,PID);
正则表达式_rx=新正则表达式(模式,RegexOptions.IgnoreCase);
List comports=新列表();
RegistryKey rk1=Registry.LocalMachine;
注册表项rk2=rk1.OpenSubKey(“系统\\CurrentControlSet\\Enum”);
foreach(rk2.GetSubKeyNames()中的字符串s3)
{
注册表项rk3=rk2.OpenSubKey(s3);
foreach(rk3.GetSubKeyNames()中的字符串s)
{
如果(接收匹配成功)
{
注册表项rk4=rk3.OpenSubKey;
foreach(rk4.GetSubKeyNames()中的字符串s2)
{
注册表项rk5=rk4.OpenSubKey(s2);
字符串位置=(字符串)rk5.GetValue(“位置信息”);
注册表项rk6=rk5.OpenSubKey(“设备参数”);
字符串portName=(字符串)rk6.GetValue(“portName”);
如果(!String.IsNullOrEmpty(portName)&&SerialPort.GetPortNames().Contains(portName))
Add((字符串)rk6.GetValue(“端口名”);
}
}
}
}
返回组件;
}
以下是我对这一点的看法(即使这不是直接的a到Q)
- USB设备总是(并且一直)在
下枚举(注意HKLM\SYSTEM\CurrentControlSet\Enum\USB
)USB
- 设备节点的格式为
,其中VID_xxxx&PID_xxxx*
为十六进制,可能在末尾有一些额外的函数数据xxxx
- 设备节点的格式为
- 每个设备节点都有一个基于序列号或其他数据的子标识符节点
using System.IO.Ports; using System.Linq; using Microsoft.Win32; public class UsbSerialPort { public readonly string PortName; public readonly string DeviceId; public readonly string FriendlyName; private UsbSerialPort(string name, string id, string friendly) { PortName = name; DeviceId = id; FriendlyName = friendly; } private static IEnumerable<RegistryKey> GetSubKeys(RegistryKey key) { foreach (string keyName in key.GetSubKeyNames()) using (var subKey = key.OpenSubKey(keyName)) yield return subKey; } private static string GetName(RegistryKey key) { string name = key.Name; int idx; return (idx = name.LastIndexOf('\\')) == -1 ? name : name.Substring(idx + 1); } public static IEnumerable<UsbSerialPort> GetPorts() { var existingPorts = SerialPort.GetPortNames(); using (var enumUsbKey = Registry.LocalMachine.OpenSubKey(@"SYSTEM\CurrentControlSet\Enum\USB")) { if (enumUsbKey == null) throw new ArgumentNullException("USB", "No enumerable USB devices found in registry"); foreach (var devBaseKey in GetSubKeys(enumUsbKey)) { foreach (var devFnKey in GetSubKeys(devBaseKey)) { string friendlyName = (string) devFnKey.GetValue("FriendlyName") ?? (string) devFnKey.GetValue("DeviceDesc"); using (var devParamsKey = devFnKey.OpenSubKey("Device Parameters")) { string portName = (string) devParamsKey?.GetValue("PortName"); if (!string.IsNullOrEmpty(portName) && existingPorts.Contains(portName)) yield return new UsbSerialPort(portName, GetName(devBaseKey) + @"\" + GetName(devFnKey), friendlyName); } } } } } public override string ToString() { return string.Format("{0} Friendly: {1} DeviceId: {2}", PortName, FriendlyName, DeviceId); } }
List < List <string>> USBCOMlist = new List<List<string>>(); try { ManagementObjectSearcher searcher = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_PnPEntity"); foreach (ManagementObject queryObj in searcher.Get()) { if (queryObj["Caption"].ToString().Contains("(COM")) { List<string> DevInfo = new List<string>(); string Caption = queryObj["Caption"].ToString(); int CaptionIndex = Caption.IndexOf("(COM"); string CaptionInfo = Caption.Substring(CaptionIndex + 1).TrimEnd(')'); // make the trimming more correct DevInfo.Add(CaptionInfo); string deviceId = queryObj["deviceid"].ToString(); //"DeviceID" int vidIndex = deviceId.IndexOf("VID_"); int pidIndex = deviceId.IndexOf("PID_"); string vid = "", pid = ""; if (vidIndex != -1 && pidIndex != -1) { string startingAtVid = deviceId.Substring(vidIndex + 4); // + 4 to remove "VID_" vid = startingAtVid.Substring(0, 4); // vid is four characters long //Console.WriteLine("VID: " + vid); string startingAtPid = deviceId.Substring(pidIndex + 4); // + 4 to remove "PID_" pid = startingAtPid.Substring(0, 4); // pid is four characters long } DevInfo.Add(vid); DevInfo.Add(pid); USBCOMlist.Add(DevInfo); } } } catch (ManagementException e) { MessageBox.Show(e.Message); }
- 每个设备节点都有一个基于序列号或其他数据的子标识符节点