如何获取正在使用的RS232端口？ [英] How do I get the RS232 ports that are being used?

问题描述

如何获取正在使用的RS232端口？这是我提出的代码。

How do I get the RS232 ports that are being used? This is the code that I came up with.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.IO.Ports;
using System.Windows.Forms;
using System.Management;

namespace Detect_USB2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            SerialPort ComPort = new SerialPort();

            chkSP();
        }
        private void chkSP()
        {
            ManagementObjectSearcher searchType = new ManagementObjectSearcher("SELECT * FROM Win32_SerialPort");

            foreach (ManagementObject moDiskete in searchType.Get())
            {
                if (!listBox1.Items.Contains(moDiskete["Name"]))
                {
                    
                    listBox1.Items.Add(moDiskete["Name"].ToString());

                }
            }            
        }
        private void MyTimer_Tick(object sender, EventArgs e)
        {
         listBox1.Items.Clear();
            chkSP(); 
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            Timer MyTimer = new Timer();
            MyTimer.Interval = (5 * 1000); // 1 mins
            MyTimer.Tick += new EventHandler(MyTimer_Tick);
            
            MyTimer.Start();
        }  
    }
}

推荐答案

以SerialPort.GetPortNames(v=vs.110).aspx [< a href =http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.getportnames(v=vs.110).aspx\"target =_ blanktitle =New Window > ^ ]要找到系统的所有可用端口，那么你几乎必须尝试在try ... catch块中打开每个端口并仅使用那些没有失败的端口。对于comport没有IsFree属性，IsOpen只跟踪当前应用程序中的端口 - 如果它在不同的应用程序中打开（因此不是免费的），IsOpen仍将返回false。

Start with SerialPort.GetPortNames(v=vs.110).aspx[^] to find all available ports to the system, then you pretty much have to try to Open each one in a try...catch block and use only those that don't fail. There is no "IsFree" property for a comport and "IsOpen" only tracks ports within the current app - if it's open in a different application (and thus not free) IsOpen will still return false.

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