Redirecting Standard Input Interactively

[Sudesh]

Hi,
I am a newbie to C# and Im trying to redirect standard input, output and
error of a console program written in C (MS VC 6.0) to a textbox on a form.
The code for the redirecting looks like this:

private System.IO.Strea mWriter c_StreamInput = null;
private System.IO.Strea mReader c_StreamOutput = null;
private Thread c_ThreadRead = null;
private Process c_Process = null;

private void ReadStdOutputTh readProc()
{
while(!c_Proces s.HasExited)
{
try
{
string str = c_StreamOutput. ReadLine();
while (str != null)
{
c_StreamOutput. BaseStream.Flus h();
txtboxCNF.Appen dText(str + "\r\n");
Thread.Sleep(10 0);
str = c_StreamOutput. ReadLine();
}
}
catch (Exception) { }
}
}

private void btnCNF_Click(ob ject sender, System.EventArg s e)
{
if(c_Process == null)
{
c_Process = new Process();
ProcessStartInf o psi = new ProcessStartInf o("console.exe" );
psi.UseShellExe cute = false;
psi.RedirectSta ndardOutput = true;
psi.RedirectSta ndardInput = true;
psi.CreateNoWin dow = true;
c_Process.Start Info = psi;
c_Process.Start ();

c_StreamInput = c_Process.Stand ardInput;
c_StreamOutput = c_Process.Stand ardOutput;

c_StreamInput.A utoFlush = true;

c_ThreadRead = new Thread(new ThreadStart(Rea dStdOutputThrea dProc));
c_ThreadRead.Is Background = true;
c_ThreadRead.St art();
}
}

private void Form1_Closing(o bject sender,
System.Componen tModel.CancelEv entArgs e)
{
if (c_ThreadRead != null)
{
c_ThreadRead.Ab ort();
c_ThreadRead.Jo in();
}
if(c_Process != null && !c_Process.HasE xited)
c_Process.Kill( );
}

private void txtboxCNF_KeyDo wn(object sender,
System.Windows. Forms.KeyEventA rgs e)
{
if(e.KeyValue == 13)
{
c_StreamInput.W riteLine((char) e.KeyValue+"\0\ n");
}
}

The console application that I am trying to run (console.exe) is a simple C
program that prints a line text and then calls the gets() function. The code
is basically this:

#include "stdafx.h"
#include <conio.h>
#include <string.h>

void create_it();

int main(int argc, char* argv[])
{
create_it();

return 1;
}

void create_it()
{
char str_nodes[256], str_filename[256], str_username[256], str_serial[256];

printf("Welcome to the console program\n");

/* Display maximum number of nodes */
printf ("Max Nodes : ");
gets( str_nodes);

/* get file name */
printf ("Enter user configuration file name : ");
gets (str_filename);

/* get user name */
printf ("User Name : ");
gets (str_username);

/* get serial number */
printf ("Serial Id : ");
gets (str_serial);
}

Thanks in advance for your help.

[Sudesh]

RE: Redirecting Standard Input Interactively

The problem Im facing is that there is not output in the textbox and the
program seems to block and hang....

[Yury]

Re: Redirecting Standard Input Interactively

I think handle OutputDataRecei ved and ErrorDataReceiv ed process events
is better.

[Sudesh]

Re: Redirecting Standard Input Interactively

=============== =============== =============== ======
"Yury" wrote:[color=blue]
> I think handle OutputDataRecei ved and ErrorDataReceiv ed process events
> is better.
>
>[/color]
=============== =============== =============== ======


Hi Yury,

I have tried this, but I keep getting the following error message at the
call: c_Process.Begin OutputReadLine( )
"Cannot mix synchronous and asynchronous operation on process stream.".

My code looks like this:

private void CNFOutputHandle r(object sendingProcess, DataReceivedEve ntArgs
outLine)
{
// Collect the sort command output.
if (!String.IsNull OrEmpty(outLine .Data))
{
txtboxCNF.Appen dText(outLine.D ata + "\r\n");
}
}

private void btnCNF_Click(ob ject sender, System.EventArg s e)
{
if(c_Process == null)
{
c_Process = new Process();
ProcessStartInf o psi = new
ProcessStartInf o("C:\\XPDistri bution\\console .exe");
psi.UseShellExe cute = false;
psi.RedirectSta ndardOutput = true;

////
c_Process.Outpu tDataReceived += new
DataReceivedEve ntHandler(CNFOu tputHandler);
////

psi.RedirectSta ndardInput = true;
psi.CreateNoWin dow = true;
c_Process.Start Info = psi;
c_Process.Start ();

c_StreamInput = c_Process.Stand ardInput;
c_StreamOutput = c_Process.Stand ardOutput;

c_StreamInput.A utoFlush = true;

//c_ThreadRead = new Thread(new ThreadStart (ReadStdOutputT hreadProc));
//c_ThreadRead.Is Background = true;
//c_ThreadRead.St art();

c_Process.Begin OutputReadLine( );
}
}

Any ideas what I am doing wrong ?

Thanks.