如下我能够通过给定的pid和vid获得附加到32位win7OS机器的usb com端口名称,但是当在x64中运行时它会卡在以下行中：
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;
}
解决方法
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.
但我找到了一种通过做这个小改变来阅读它的方法：
但我找到了一种通过做这个小改变来阅读它的方法：
static List<string> ComPortNames(String VID,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;
}
它做得很好.谢谢你的代码,顺便说一句……它给了我很多帮助！
