C# SerialPort#Open() 方法由于端口名称而引发 ArgumentException?

C# SerialPort#Open() method throws ArgumentException because of port name?(C# SerialPort#Open() 方法由于端口名称而引发 ArgumentException?)

问题描述

在我的本地机器上，

• 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)

  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();
          }
      }
  }
  

  会抛出以下ArgumentException，

  也就是说，

  给定的端口名称不以 COM/com 开头或不解析为一个有效的串口.

  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 端口被映射到其他东西并给出了这个奇怪的错误作为响应.

  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 打印机设置来使用相同的端口.一旦我更改了打印机设置中的端口，SerialPort.Open() 就起作用了.

  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编程学习网！