请教一个关于委托与事件的问题
我在一个关于串口操作的项目里，利用一个窗体来对串口进行读写操作。config.cs窗体用来设置参数及收发指令。
Comm.cs类用来执行收发工作。
我的想法是当串口接收到数据后，config.cs窗体上自动弹出一个MessageBox。我采用了委托与事件方式。
代码如下,现在的问题是：在config.cs中设置串口参数及发送指令都正常，但是接收就不行了，用断点监控Comm.cs文件，可以确定串口是有接收有内容，但就是无法反馈到config.cs窗体上并自动弹出MessageBox.
不好意思，初学c#，对事件和委托感到很糊涂。总找不出问题出在哪里。还望高手们指点下迷津啊。
config.cs窗体代码：
using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace SerialPort_WR
{
public partial class Config : Form
{
private Comm comm;
public string spName;//serialPort.PortName
public int spBaudRate;//serialPort.BaudRate
public spStopBits;//serialPort.StopBits;
public int spDataBits;//serialPort.DataBits
public spHandShake;//serialPort.HandShake
public spParity;//serialPort.Parity;
public Config()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
PortSetupInit();
}
public void PortSetupInit()
{
//扫描所有串口
foreach (string P in ())
{
cB_PortName.Items.Add(P);
}
cB_PortName.SelectedIndex = 1;
cB_BaudRate.SelectedIndex = 9;//波特率
cB_DataBits.SelectedIndex = 3;//数据位
cB_Handshake.SelectedIndex = 2;//流控制
cB_Parity.SelectedIndex = 0;//校验位
cB_StopBits.SelectedIndex = 0;//停止位
cB_SchTak.SelectedIndex = 0;//查询时间
//serialPort1.RtsEnable = true;
//serialPort1.Encoding = System.Text.Encoding.GetEncoding("GB2312");//指定字符集，使之能发送中文
}
void comm_HaveDataReady(string RevCmd, String RevData)//这里设置了断点，总是无法执行这一行。问题可能出在这里。
{
this.BeginInvoke(new Comm.DataEventHandler(DataReady), new object[]{RevCmd,RevData});
}
void DataReady(string RevCmd, String RevData)
{
MessageBox.Show(RevCmd, RevData);
}
private void ConfigSave_Click(object sender, EventArgs e)
{
if (comm != null)
{
if (comm.IsOpen())
{
comm.Close();
}
else
{
comm.Open();
}
}
else
{
SPSetup();
comm = new Comm(spName, spBaudRate, spParity, spDataBits, spStopBits, spHandShake);
comm.HaveDataReady += new Comm.DataEventHandler(comm_HaveDataReady);
comm.Open();
ConfigSave.Text = "关闭串口";
}
}
public void SPSetup()
{
spName = cB_PortName.Text;
spBaudRate = Convert.ToInt32(cB_BaudRate.Text);
spDataBits = Convert.ToInt16(cB_DataBits.Text);
switch (cB_StopBits.SelectedItem.ToString())//设置停止位
{
case "1":
spStopBits =
break;
case "1.5":
spStopBits =
break;
case "2":
spStopBits =
break;
}
switch (cB_Handshake.SelectedItem.ToString())//设置流控制
{
case "HARDWARE":
spHandShake =
break;
case "SOFTWARE":
spHandShake =
break;
case "NONE":
spHandShake =
break;
case "Custom":
spHandShake =
break;
}
switch (cB_Parity.SelectedItem.ToString())//设置校验位
{
case "None":
spParity =
break;
case "Odd":
spParity =
break;
case "Even":
spParity =
break;
case "Mark":
spParity =
break;
case "Space":
spParity =
break;
}
}
private void bT_Clear_Click(object sender, EventArgs e)
{
//tB_Receive.Clear();
//Comm com = new Comm(spName, spBaudRate, spParity, spDataBits, spStopBits, spHandShake);
tB_Receive.Text += comm.s2;
}
private void tB_Receive_TextChanged(object sender, System.EventArgs e)
{
if (tB_Receive.Text.Length > 0)
{
tB_Receive.Select(tB_Receive.Text.Length - 1, 0); // 如果有換行的数据时，会在最后一行产生空行。
tB_Receive.ScrollToCaret();
}
}
public void bT_SendMsg_Click(object sender, EventArgs e)
{
comm.SendMsg(tB_PhoneNo.Text, tB_Msg.Text);
}
private void Delay(int mm)
{
DateTime current = DateTime.Now;
while (current.AddMilliseconds(mm) > DateTime.Now)
{
Application.DoEvents();
}
return;
}
private void Config_Resize(object sender, EventArgs e)
{
this.FormBorderStyle =System.Windows.Forms.FormBorderStyle.None;
}
}
Comm.cs文件代码：
using System.Text;
using System;
using System.Threading;
using
using
using System.Windows.Forms;
public class Comm
{
private SerialPort port;
private byte[] readcache;
private int idx;
public string SendOK;
public string s2;
public string s3;
public delegate void DataEventHandler(string RevCmd, string RevData);
public event DataEventHandler HaveDataReady;
public Comm(string spName, int spBaudRate, Parity spParity, int spDataBits, StopBits spStopBits, Handshake spHandShake)
{
port = new SerialPort(spName, spBaudRate, spParity, spDataBits, spStopBits);
port.Handshake = spHandShake;
port.ReadTimeout = 500;
port.WriteTimeout = 500;
port.ReadBufferSize = 1024;
port.ReceivedBytesThreshold = 1;
port.DataReceived += new SerialDataReceivedEventHandler(portDataReceived);
readcache = new byte[256];
idx = 0;
}
public bool IsOpen()
{
return port.IsOpen;
}
public void Open()
{
port.Open();
}
public void Close()
{
port.Close();
}
public void portDataReceived(object sender, SerialDataReceivedEventArgs e)
{
try
{
byte inputData = 0;
while ((port.BytesToRead > 0))
{
inputData = (byte)port.ReadByte();
if (inputData.Equals(0xa))
{
idx = 0;
}
else if (inputData.Equals(0xd))
{
byte[] b = new byte[idx];
Array.Copy(readcache, b, idx);
s2 = Encoding.ASCII.GetString(b);
st(s2);
idx = 0;
}
else
{
readcache[idx] = inputData;
idx++;
idx %= 1024;
}
}
}
catch
{
}
}
public void st(string s2)
{
s3 = s2;
}
public void SendMsg(string phone, string msg)
{
port.WriteLine(phone);
port.WriteLine(msg);
}
private void Delay(int mm)
{
DateTime current = DateTime.Now;
while (current.AddMilliseconds(mm) > DateTime.Now)
{
Application.DoEvents();
}
return;
}
}
