Question

我正在读取Arduino，它通过USB端口发送文本。 Arduino每秒发送它的输出状态。在接收到的命令事件中，我设置了几个复选框（快门打开或电源打开，或点亮），并将收到的数据输出到多行文本框。无论如何......这一切都有效，持续几秒钟，然后放慢速度，最终在大约10分钟后，我得到了一个Out of Memory异常。我不知道出了什么问题，我假设它在类中读取串行数据 - 所以这里是代码，任何人都可以看到错误吗？

using System;
using System.IO.Ports;

namespace WOCA.Core.SerialComms
{
    internal class ArduinoCommunicator : ICommunicator
    {
        public event EventHandler<CommsEventsArg> CommandReceived;

    internal ArduinoCommunicator(string comPort)
    {
        Port = new SerialPort(comPort) {BaudRate = 9600, DtrEnable = true};
        Port.DataReceived += PortOnDataReceived;
    }

    private SerialPort Port { get; set; }


    public bool IsOpen { get; set; }


    public void Open()
    {
        try
        {
            if (!Port.IsOpen)
            {
                Port.Open();
                IsOpen = true;
            }
            else
            {
                throw new InvalidSerialCommsException("Serial port already open");
            }
        }
        catch (Exception ex)
        {
            throw new InvalidSerialCommsException("Serial Port error: " + ex.Message);
        }
    }

    public void Close()
    {
        try
        {
            if (Port.IsOpen)
            {
                Port.Close();
                IsOpen = false;
            }
            else
            {
                throw new InvalidSerialCommsException("Serial port not open");
            }
        }
        catch (Exception)
        {

            throw new InvalidSerialCommsException("Serial port error");
        } 

    }

    public void SendCommand(string command)
    {
        try
        {
            if (Port.IsOpen)
            {
                Port.Write(command);
            }
            else
            {
                throw new InvalidSerialCommsException("Serial port not open");
            }
        }
        catch (Exception)
        {

            throw new InvalidSerialCommsException("Serial port error, the command has not been sent");
        }

    }

    private void PortOnDataReceived(object sender, SerialDataReceivedEventArgs serialDataReceivedEventArgs)
    {
        SerialPort serialPort = sender as SerialPort;

        if (serialPort != null)
        {
            string command = serialPort.ReadLine();
            command = command.Remove(command.Length-1,1);
            CommsEventsArg args = new CommsEventsArg(command);
            OnCommandReceived(args);
        }
    }

    protected virtual void OnCommandReceived(CommsEventsArg e)
    {
        EventHandler<CommsEventsArg> handler = CommandReceived;
        if (handler != null)
        {
            handler(this, e);
        }
    }
}

}

Answer 1

这可能是由SerialPort类的实现引起的。它永远不会永远不会控制其他线程，因此终结线程无法完成对象并释放内存。请参阅我的文章：http://alexatnet.com/articles/net-memory-management-and-garbage-collector#best-practices

要解决此问题，您需要添加

Thread.CurrentThread.Join(100)

例如，它可能会添加到PortOnDataReceived。这将允许终结线程运行等待终结器。

Serial.readline - 内存不足

1 个答案: