C# 串口接收不到数据

Frankfu001 2011-01-20 05:51:02

我用串口调试助手可以接收到数据，但是用自己编写加修改人家代码得到的C#串口接收不到数据，请高手指教，我将代码贴出来
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
//using System.Threading;
using System.Collections;
using System.Threading;
using System.IO.Ports; //--导入串口通讯所需命名空间,作用待定

namespace SerialPort
{
public partial class Serial : Form
{
public Serial()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
try //--使用try catch防止串口获取出现错误
{
string[] szPorts = System.IO.Ports.SerialPort.GetPortNames(); //--获取当前PC机接入串口
combSerialPort.Items.AddRange(szPorts); //--
combSerialPort.SelectedIndex = 0;
}
catch (Win32Exception win32ex) //获取串口出错
{
MessageBox.Show(win32ex.ToString());
}
//--串口相关参数初始化
//--波特率
serialPort1.PortName = combSerialPort.Text;
string[] ss = new string[] { "9600", "19200", "57600", "115200" };
combBaudRate.DataSource = ss;

//--校验位
combParityBit.DataSource = Enum.GetNames(typeof(Parity));

//--数据位
ss = new string[] { "5", "6", "7", "8" };
combDataBit.DataSource = ss;
combDataBit.Text = "8";

//--停止位
combStopBits.DataSource = Enum.GetNames(typeof(StopBits));
combStopBits.Text = Enum.Format(typeof(StopBits), StopBits.One, "G");
serialPort1.Encoding = Encoding.GetEncoding("gb2312");//接收发送转换编码
}

private void btnOpenCom_Click(object sender, EventArgs e)
{
try
{
if (serialPort1.IsOpen)
{
serialPort1.Close();
}
else
{
serialPort1.PortName = combSerialPort.Text;
serialPort1.BaudRate = Convert.ToInt32(combBaudRate.Text);
serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), combParityBit.Text);
serialPort1.DataBits = Int32.Parse(combDataBit.Text);
serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), combStopBits.Text);
serialPort1.Encoding = Encoding.GetEncoding("Gb2312");
serialPort1.Open();
}
RefrespictureBox1();
//--串口信息显示
toolStripStatusLabel1.Text = "串口:" + combSerialPort.SelectedItem.ToString()
+ " 波特率：" + combBaudRate.SelectedItem.ToString()
+ " 数据位："+combParityBit.SelectedItem.ToString()
+ " 停止位：" + combStopBits.SelectedItem.ToString(); //--综合显示信息
textBox1.Text =DateTime.Now.ToString();

}
catch (Exception)
{ }
}

public void RefrespictureBox1()
{
if (serialPort1.IsOpen)
{
btnOpenCom.BackColor = SystemColors.GradientActiveCaption;
btnOpenCom.Text = "关闭";
}
else
{
btnOpenCom.BackColor = SystemColors.Control;
btnOpenCom.Text = "打开";
}
}

private void btnSendData_Click(object sender, EventArgs e)
{
try
{
string s = "";
if (checkBox1.Checked) //--16进制发送
{
ArrayList al = MyClass.Str16ToArrayList(editSendData.Text); //--MyClass是自定义的一个类
//--转化后数据
byte[] by = new byte[al.Count];
int i = 0;
foreach (string stmp in al)
{
by[i] += Convert.ToByte(stmp, 16);
i++;
}
s = Encoding.GetEncoding("Gb2312").GetString(by);
}
else
{
s = editSendData.Text;
}
serialPort1.Write(s); //--串口发送
}
catch (Exception)
{ }
}

//--**************多线程操作！*********************--//
delegate void SetTextCallback(string text);
private void SetText(string text)
{
try
{
//--获取一个值，该值指示调用方在对控件进行方法调用时是否必须调用 Invoke 方法，
//--因为调用方位于创建控件所在的线程以外的线程中，主要判断是否是调用方位于创建控件所在的线程以外的线程中
if (this.editRecvData.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);//--使用委托。
this.Invoke(d, new object[] { text }); //--在拥有此控件的基础窗口句柄的线程上执行指定的委托
}
else
{
this.editRecvData.Text += text; //--同一线程时修改属性值
}
}
catch (Exception)
{
}
}

//--backgroundWorker1_DoWork
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
char[] c;
while (true)
{
try
{
if (serialPort1.IsOpen)
{
c = new char[serialPort1.BytesToRead];
serialPort1.Read(c, 0, c.Length);
if (c.Length > 0)
{
if (checkBox2.Checked)
{
byte[] by = Encoding.GetEncoding("Gb2312").GetBytes(c);
foreach (byte btmp in by)
{
string s = "00" + string.Format("{0:X}", btmp);
s = s.Substring(s.Length - 2, 2);
SetText(new string(s.ToCharArray()));
SetText(" ");
}
}
else
{
SetText(new string(c));
}
}
}
}
catch (Exception) { }
Thread.Sleep(1);
}
}

private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
string s = "";
if (checkBox1.CheckState == CheckState.Checked)
{
byte[] by = Encoding.GetEncoding("Gb2312").GetBytes(editSendData.Text);
editSendData.Text = "";
foreach (byte btmp in by)
{
s = "00" + string.Format("{0:X}", btmp);
editSendData.Text += s.Substring(s.Length - 2, 2);
editSendData.Text += " ";
}
}
else
{
ArrayList al = MyClass.Str16ToArrayList(editSendData.Text);
byte[] by = new byte[al.Count];
int i = 0;
foreach (string stmp in al)
{
by[i] += Convert.ToByte(stmp, 16);
i++;
}
editSendData.Text = Encoding.GetEncoding("Gb2312").GetString(by);
}
}

//--默认关闭界面保存数据
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
Properties.Settings.Default.Save();
}

private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
editRecvData.Text = "";
}
//--------**********************-------//
private void editSendData_KeyPress(object sender, KeyPressEventArgs e)
{
if (checkBox1.CheckState == CheckState.Checked)
{
if (!Uri.IsHexDigit(e.KeyChar) && e.KeyChar != ' ')
{
e.KeyChar = (char)0;
}
}
}

}
}

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