[未解决]
我正在尝试接收数据并将其写入txt文件，我检查了此post并正确添加了eventHandler。开启顺序等是相同的。但是，即使尝试打印（在SerialPort_DataReceived内部），我也无法接收任何数据。我无法接收数据。
p.CmdSerialPort.DataReceived始终为null，无论我如何更改。
有人可以帮忙吗？
class Program
{
private System.IO.Ports.SerialPort CmdSerialPort;
private StreamWriter swLog;
private DateTime lastComm = DateTime.MinValue;
private UdpClient udpClient_Cmd;
private volatile bool _enabled_Cmd;
public static int Ethernet_Packet_Header_Length = 14;
public IPAddress IP { get; protected set; }
public int Cmd_Port { get; protected set; }
static void Main(string[] args)
{
Console.WriteLine("Please Enter Parameters: ");
Program p = new Program();
p.IP = IPAddress.Parse("....");//IP
p.CmdSerialPort = new SerialPort();
p.CmdSerialPort.Handshake = Handshake.None;
p.CmdSerialPort.BaudRate = 9600;
p.CmdSerialPort.Parity = Parity.None;
p.CmdSerialPort.StopBits = StopBits.One;
p.CmdSerialPort.DataBits = 8;
//takes port, ethernet and filename inputs
string s = Console.ReadLine();
string[] input = s.Split(' ').ToArray();
if (input.Length > 3)
Console.WriteLine("Wrong input size!");
string filename = input[2];//takes filename
//DEFAULT PATH ROOT
String root = @".\\";
string path_combined;
filename += ".txt";
path_combined = Path.Combine(root, filename);
try
{
if (p.TryConnect(input[0]))//takes port name eg.COM9
p.swLog = File.CreateText(path_combined);
}
catch (System.IndexOutOfRangeException ex)
{
System.ArgumentException argEx = new System.ArgumentException("File creation failed!", ex);
throw argEx;
}
p.Cmd_Port = Int32.Parse(input[1]);//takes port number eg.4667
p.Initialize();
Console.ReadKey();
p.Close2();
p.Close();
}//end of main
////////////////////////////////////////////////////////////
// SERIAL PORT
////////////////////////////////////////////////////////////
private bool TryConnect(string portName)
{
try
{
CmdSerialPort.PortName = portName;
CmdSerialPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(SerialPort_DataReceived);
CmdSerialPort.Open();
if (CmdSerialPort.IsOpen)
{
return true;
}
return false;
}
catch (UnauthorizedAccessException e)
{
Debug.WriteLine(e.ToString());
Debug.WriteLine(e.Message);
return false;
}
catch (ArgumentOutOfRangeException e)
{
Debug.WriteLine(e.ToString());
Debug.WriteLine(e.Message);
return false;
}
catch (ArgumentException e)
{
Debug.WriteLine(e.ToString());
Debug.WriteLine(e.Message);
return false;
}
}
internal void Close2()
{
if (CmdSerialPort.IsOpen)
{
CmdSerialPort.Close();
}
swLog.Close();
swLog = null;
}
private void SerialPort_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
lastComm = DateTime.Now;
if (sender is SerialPort sp)
{
string indata = sp.ReadExisting();
indata = indata.Trim(' ').Trim('\n').Trim('\r');
WriteToFile($"{CmdSerialPort.PortName}\t{lastComm}\t{indata}");
}
}
private void WriteToFile(string v)
{
swLog.WriteLine(v);
}
}