C#SerialPort#Open()方法是否由于端口名称而引发ArgumentException? [英] C# SerialPort#Open() method throws ArgumentException because of port name?

问题描述

在我的本地计算机上，

• Windows XP
• 端口(COM和LPT)
  • COM3
  • RIM虚拟串行端口v2(COM4)
  • RIM虚拟串行端口v2(COM5)
  • Windows XP
  • Ports (COM & LPT)
    • COM3
    • RIM Virtual Serial Port v2 (COM4)
    • RIM Virtual Serial Port v2 (COM5)

    以下代码

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.IO.Ports;
    using System.Threading;
    
    namespace OpenSerialPortTest
    {
        class Test
        {
            static void Main(string[] args)
            {
                foreach (String serialPortName in SerialPort.GetPortNames())
                {
                    SerialPort serialPort = new SerialPort(serialPortName);
                    try
                    {
                        serialPort.Open(); // Line 19
                        Console.WriteLine(serialPort.PortName);
                    }
                    catch (Exception ex1)
                    {
                        Console.WriteLine(ex1);
                        try
                        {
                            serialPort.Close();
                        }
                        catch (Exception ex2)
                        {
                            Console.WriteLine(ex2);   
                        }
                    }
                }
                Console.ReadLine();
            }
        }
    }
    

    将抛出以下ArgumentException，

    也就是说，

    给定的端口名不是以COM/com开头或不能解析为 有效的串行端口.

    The given port name does not start with COM/com or does not resolve to a valid serial port.

    有人知道为什么会这样吗?

    Does anybody know why this is happening?

    推荐答案

    看看 http://social.msdn.microsoft .com/Forums/en/csharpgeneral/thread/35954173-2eeb-46af-bb3e-86840c6b5484

    似乎问题在于那些COM端口已映射到其他端口，并在响应中给出了这个奇怪的错误.

    seems the problem was that those COM ports were mapped to something else and gives this strange error in response.

    我遇到了完全相同的问题.我发现我有一个Windows打印机设置要使用相同的端口.一旦我在打印机设置中更改了端口，SerialPort.Open()就会起作用.

    I had exactly the same problem. I found that I had a windows printer setup to use the same port. As soon as I changed the port in the printers settings, the SerialPort.Open() worked.

    这篇关于C#SerialPort#Open()方法是否由于端口名称而引发ArgumentException?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！