在 main() 中为 SerialPort 添加事件处理程序

我尝试将事件处理程序订阅到数据接收事件。似乎我无法指定事件处理函数名称。我不明白为什么
myComPort.DataReceived += new SerialDataReceivedEventHandler(comPort_DataReceived);给我错误信息。 问题就到这里了，希望大家能够解答。

一只忙碌的猫 http://img827.imageshack.us/img827/5904/20120125102247.png http://img827.imageshack.us/img827/5904/20120125102247.png

一只忙碌的猫 http://img444.imageshack.us/img444/3855/20120125102202.png http://img444.imageshack.us/img444/3855/20120125102202.png

namespace serialport
{
    public class Program
    {

        internal List<Byte> portBuffer = new List<Byte>(1024);

        static void Main()
        {


            //1. find available COM port
            string[] nameArray = null;
            string myComPortName = null;
            nameArray = SerialPort.GetPortNames();
            if (nameArray.GetUpperBound(0) >= 0)
            {
                myComPortName = nameArray[0];
            }
            else
            {
                Console.WriteLine("Error");
                return;
            }


            //2. create a serialport object
            // the port object is closed automatically by use using()
            SerialPort myComPort = new SerialPort();
            myComPort.DataReceived += new SerialDataReceivedEventHandler(comPort_DataReceived);
            myComPort.PortName = myComPortName;
            //the default paramit are 9600,no parity,one stop bit, and no flow control



            //3.open the port
            try
            {
                myComPort.Open();
            }
            catch (UnauthorizedAccessException ex)
            {
                MessageBox.Show(ex.Message);
            }
            //Add timeout, p161

            //reading Bytes
            byte[] byteBuffer = new byte[10];
            Int32 count;
            Int32 numberOfReceivedBytes;
            myComPort.Read(byteBuffer, 0, 9);
            for (count = 0; count <= 3; count++)
            {
                Console.WriteLine(byteBuffer[count].ToString());
            }


        }
        //The event handler should be static??
        void comPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            int numberOfBytesToRead;
            numberOfBytesToRead = myComPort.BytesToRead;
            byte[] newReceivedData = new byte[numberOfBytesToRead];
            myComPort.Read(newReceivedData, 0, numberOfBytesToRead);
            portBuffer.AddRange(newReceivedData);
            ProcessData();
        }
        private void ProcessData()
        {
            //when 8 bytes have arrived, display then and remove them from the buffer
            int count;
            int numberOfBytesToRead = 8;

            if (portBuffer.Count >= numberOfBytesToRead)
            {
                for (count = 0; count < numberOfBytesToRead; count++)
                {
                    Console.WriteLine((char)(portBuffer[count]));
                }
                portBuffer.RemoveRange(0, numberOfBytesToRead);
            }
        }

    }

    }

一、since方法Main是静态的，只能调用同一个类中的其他静态方法。事实上，comPort_DataReceived被声明为实例方法，以下代码应修复事件处理程序的分配：

static void comPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
   // ...
}

第二，自从myComPort定义于Main，它将不可见于comPort_DataReceived。你有两个选择：要么声明myComPort作为类的静态成员，或者使用sender事件处理程序的参数：

static void comPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
    SerialPort port = (SerialPort)sender;
    // ...
}