我正在编写一个通过向 USB 端口发送字节进行通信的应用程序。我希望允许用户选择端口，为此，我使用 SerialPort.GetPortNames()。不幸的是，它返回一个空数组。该方法据称会读取注册表中的数据（HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM），但 SERIALCOMM 目录丢失。当我在 Linux 上运行该程序时，它会按预期列出我的四个 USB 端口。如何以不同的方式修复注册表/发现端口？
I'm writing an application that communicates by sending bytes to the USB port. I'd like to allow the user to choose the port and to do that, I use SerialPort.GetPortNames(). Unfortunately, it returns an empty array. The method supposedly reads the registry for data (HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM), but the SERIALCOMM directory is missing. When I run the program on Linux, it lists my four USB ports, as expected. How can I fix the registry/discover the ports in a different way?
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您可以使用管理对象来查询可用的 COM 端口。有趣的表是：
您可以在 WMI Code Creator，并生成 VBScript/VB/C# 代码。
You could use Management Objects to query available COM ports. The interesting tables are:
You can explore these namespaces in the WMI Code Creator, and generate VBScript/VB/C# code.
SerialPort.GetPortNames()是发现串行端口的正确方法。但如果您使用的是 Windows 7，我认为这可能是此方法列出的注册表项的权限问题。我找到了一篇描述此问题的帖子 Microsoft.com。The
SerialPort.GetPortNames()are the correct method to discover serial ports. But if you are using Windows 7, I think it could be issues with permissions on the registry keys this method lists. I found a post which describe this problem at Microsoft.com.SerialPort.GetPortNames()返回计算机上安装的 COM 端口列表，而不是 USB 端口。我认为 Windows 不会为您提供 USB 端口列表，而只会为您提供可用的 USB 设备。尽管名称为“通用串行总线”，但它们并不是通常意义上的“串行端口”。
SerialPort.GetPortNames()returns the list of COM ports install on the machine, not USB ports. I don't think Windows will provide you with a list of USB ports, only USB devices that are available.Despite the name "Universal Serial Bus", they are not "Serial Ports" in the convential meaning.