1. 打开注册表编辑器

regedit

2.选择如下配置

计算机\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Device

3. 代码 C#

using System;
using Microsoft.Win32;

class Program
{
    static void Main()
    {
        string registryPath = @"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Devices";
        RegistryKey devicesKey = Registry.CurrentUser.OpenSubKey(registryPath);

        if (devicesKey != null)
        {
            foreach (string printerName in devicesKey.GetValueNames())
            {
                string portName = devicesKey.GetValue(printerName).ToString();
                Console.WriteLine($"Printer: {printerName} on Port: {portName}");
            }
        }
        else
        {
            Console.WriteLine("No printers found in the registry.");
        }
    }
}