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I set up two virtual COM ports 3 and 4 using com0com. I tried to test
it with the following program. However, the DataReceived event
handlers never get called. Can anyone with SerialPort class
experience double check my code so I can narrow it down to com0com not
being setup correctly?

using System;
using System.Collecti ons.Generic;
using System.IO.Ports ;
using System.IO;
using System.Text;
namespace com0comTest
{
class Program
{
static SerialPort _com3;
static SerialPort _com4;

static void InitCom3()
{
_com3 = new SerialPort();
_com3.DataRecei ved +=new
SerialDataRecei vedEventHandler (com3_DataRecei ved);
_com3.ErrorRece ived +=new
SerialErrorRece ivedEventHandle r(com3_ErrorRec eived);

if(_com3.IsOpen )
_com3.Close();

// Port settings
_com3.BaudRate = 9600;
_com3.DataBits = 8;
_com3.StopBits = StopBits.One;
_com3.Parity = Parity.None;
_com3.PortName = "COM3";// string.Format(" COM{0:d}", 3);
_com3.ReadTimeo ut = 3000;
_com3.WriteTime out = 3000;

// Open port
_com3.Open();
}

static void InitCom4()
{
_com4 = new SerialPort();
_com4.DataRecei ved +=new
SerialDataRecei vedEventHandler (com4_DataRecei ved);
_com4.ErrorRece ived +=new
SerialErrorRece ivedEventHandle r(com4_ErrorRec eived);

if(_com4.IsOpen )
_com4.Close();

// Port settings
_com4.BaudRate = 9600;
_com4.DataBits = 8;
_com4.StopBits = StopBits.One;
_com4.Parity = Parity.None;
_com4.PortName = "COM4";// string.Format(" COM{0:d}", 4);
_com4.ReadTimeo ut = 3000; // denizen to debugging
_com4.WriteTime out = 3000;
// Open port
_com4.Open();
}

static void Main(string[] args)
{
try
{

foreach(string portname in SerialPort.GetP ortNames())
{
Console.WriteLi ne(portname);
}

InitCom3();
InitCom4();

Console.WriteLi ne("Com3 Open = " + _com3.IsOpen);
Console.WriteLi ne("Com4 Open = " + _com4.IsOpen);

com3_Send("Call ");
com4_Send("Answ er");

_com3.Close();
_com4.Close();
}
catch(Exception e)
{
Console.WriteLi ne(e.ToString() );
}
}

static void com3_Send(strin g text)
{
try
{
Console.WriteLi ne("com3_Send: " + text);
_com3.WriteLine (text);
}
catch(Exception e)
{
Console.WriteLi ne(e.ToString() );
}
}

static void com4_Send(strin g text)
{
try
{
Console.WriteLi ne("com4_Send: " + text);
_com4.WriteLine (text);
}
catch(Exception e)
{
Console.WriteLi ne(e.ToString() );
}
}

static void com3_ErrorRecei ved(object sender,
SerialErrorRece ivedEventArgs e)
{
Console.WriteLi ne("com3_ErrorR eceived()");
}

static void com3_DataReceiv ed(object sender,
SerialDataRecei vedEventArgs e)
{
Console.WriteLi ne("com3_DataRe ceived: ");
}

static void com4_ErrorRecei ved(object sender,
SerialErrorRece ivedEventArgs e)
{
Console.WriteLi ne("com4_ErrorR eceived()");
}

static void com4_DataReceiv ed(object sender,
SerialDataRecei vedEventArgs e)
{
Console.WriteLi ne("com4_DataRe ceived: ");
}
}
}
Sep 14 '08 #1
0 2477

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