串行COM端口仅在调试中有效 [英] Serial COM port works only in debug

问题描述

我想从COM端口读取数据。我使用断点时工作正常。没有我得不到任何回复。



这是我的代码。

  public   void  comport_DataReceived（ object  sender，SerialDataReceivedEventArgs e）
 {
 SerialPort comport =（SerialPort）sender; 
 
  var  bytes = comport.BytesToRead; 
 
  //  创建一个字节数组缓冲区来保存传入数据 
  var  buffer =  new   byte  [字节]; 
 
  //  从端口读取数据并将其存储在缓冲区中 
 comport.Read（buffer， 0 ，bytes）; 
 
 strReceived = ConvertHex（BitConverter.ToString（buffer））; 
 
 SetText（strReceived.ToString（））; 
 
} 

提前致谢

解决方案

更好地调用父代表。

  private   void  rs_DataReceived（ object  sender，System.IO.Ports.SerialDataReceivedEventArgs e）
 {
  string  data =  ; 
 
  if （rs.BytesToRead >   0 ）
 {
  try  
 {
 data = rs.ReadLine（）; 
  if （Parent！=  null &&  [my_delegate] ！=  null ）
 {
 Parent.Invoke（ [my_delegate] ， new   Object  [] {data}）; 
} 
} 
  catch （例外情况）
 {
  //  错误 
} 
} 
} 

我已经尝试过你给出的解决方案。但行为仍然是一样的。

你的问题告诉我们的很少。此代码的工作原理如下： SerialComms.Manager - 串行通信用于.NET的插件 [ ^ ]

  public   void  comport_DataReceived（object sender，SerialDataReceivedEventArgs e）
 {
 SerialPort comport =（SerialPort）sender; 
 
  if （！comport.IsOpen）
  return ; 
 
 var bytes = comport.BytesToRead; 
 
  //  创建一个字节数组缓冲区来保存传入数据 
 var buffer =  new  byte [bytes]; 
 
  //  从端口读取数据并将其存储在缓冲区中 
  int  bytesread = comport.Read（buffer， 0 ，bytes）; 
 
  if （bytesread>  0 ）
 strReceived =编码.ASCII.GetString（buffer， 0 ，bytesread）; 
 
} 

使用调试器，您可以检查是否获得数据，然后它应该在调试或发布中工作

I want to read data from COM Port. its working fine when i use breakpoints. without i couldn't get any response .

Here is my code.

public  void comport_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
            SerialPort comport = (SerialPort)sender;

            var bytes = comport.BytesToRead;

            // Create a byte array buffer to hold the incoming data
            var buffer = new byte[bytes];

            // Read the data from the port and store it in our buffer
            comport.Read(buffer, 0, bytes);

            strReceived = ConvertHex(BitConverter.ToString(buffer));            
                          
            SetText(strReceived.ToString());
           
}

Thanks in advance

解决方案

Better Invoke a parent's delegate.

private void rs_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
	string data="";

	if (rs.BytesToRead > 0)
	{
		try
		{
			data = rs.ReadLine();
			if (Parent != null && [my_delegate] != null)
			{
				Parent.Invoke([my_delegate], new Object[] { data });
			}
		}
		catch (Exception ex)
		{
			// error
		}
	}
}

Hi,

I have tried the solution you given .But the behaviour is same still.

Your question tells us very little. This code works as it comes from here:SerialComms.Manager - A serial communications plug-in for .NET[^]

public  void comport_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
            SerialPort comport = (SerialPort)sender;

           if (!comport.IsOpen)
                return;

            var bytes = comport.BytesToRead;

            // Create a byte array buffer to hold the incoming data
            var buffer = new byte[bytes];

            // Read the data from the port and store it in our buffer
            int bytesread = comport.Read(buffer, 0, bytes);

            if (bytesread > 0)
                strReceived = Encoding.ASCII.GetString(buffer, 0, bytesread);

}

With the debugger you can check that you get data then it should work in debug or release.

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