Hello. It seems that the following code works. And it seems that Process
object can automatically run script by using python.exe, but only if
standard output is not redirected...
/*
* Created by SharpDevelop.
* User: Zlatko
* Date: 28.5.2006
* Time: 9:38
*
* To change this template use Tools | Options | Coding | Edit Standard
Headers.
*/
using System;
using System.IO;
using System.Collecti ons.Generic;
using System.Diagnost ics;
using System.Componen tModel;
using System.Windows. Forms;
namespace CS_script
{
class MainClass
{
public static void Main(string[] args)
{
MyProcess myProcess = new MyProcess();
myProcess.Execu teScript();
MessageBox.Show ("Continue?","A pplication",
MessageBoxButto ns.OKCancel);
}
}
public class MyProcess
{
// These are the Win32 error code for file not found or access
denied.
const int ERROR_FILE_NOT_ FOUND =2;
const int ERROR_ACCESS_DE NIED = 5;
/// <summary>
/// Executes a python script.
/// </summary>
public void ExecuteScript()
{
Process myProcess = new Process();
try
{
// Get the path that stores the python script.
//string myDocumentsPath
=Environment.Ge tFolderPath(Env ironment.Specia lFolder.Persona l);
//If the script is placed in the same folder as C#
executable, set the path to current directory:
string myDocumentsPath =Environment.Cu rrentDirectory;
//Set the fully qualified script name
myProcess.Start Info.FileName = myDocumentsPath +
"\\my_script.py ";
//Execute the script:
myProcess.Start ();
//string output = myProcess.Stand ardOutput.ReadT oEnd();
//Console.WriteLi ne(output);
//Console.WriteLi ne(myProcess.St andardOutput.Re adToEnd());
//TextReader t = myProcess.Stand ardOutput;
//MessageBox.Show (t.ReadToEnd()) ;
// Wait for it to die...
myProcess.WaitF orExit();
MessageBox.Show ("Python script is successfully executed!");
}
catch (Win32Exception e)
{
if(e.NativeErro rCode == ERROR_FILE_NOT_ FOUND)
{
Console.WriteLi ne(e.Message + ". Check the path.");
}
else if (e.NativeErrorC ode == ERROR_ACCESS_DE NIED)
{
// Note that if your word processor might generate
exceptions
// such as this, which are handled first.
Console.WriteLi ne(e.Message +
". You do not have permission to print this file.");
}
}
}
}
}
Greetings,
Zlatko
"Gerard Flanagan" <gr********@yah oo.co.uk> je napisao u poruci interesnoj
grupi:11******* **************@ j73g2000cwa.goo glegroups.com.. .
"Gerard Flanagan" <gr********@yah oo.co.uk> je napisao u poruci interesnoj
grupi:11******* *************** @i39g2000cwa.go oglegroups.com. .. > tatamata wrote:
>> Hello.
>>
>> How can I run some Python script within C# program?
>>
>
> ---------------------------------------------------------------------------------
> ProcessStartInf o startInfo;
> Process process;
> string directory;
> string pyArgs;
> string script;
>
> startInfo = new ProcessStartInf o("python");
> startInfo.Worki ngDirectory = directory;
> startInfo.Argum ents = script + " " + pyArgs;
> startInfo.UseSh ellExecute = false;
> startInfo.Creat eNoWindow = true;
> startInfo.Redir ectStandardOutp ut = true;
> startInfo.Redir ectStandardErro r = true;
>
> process = new Process();
> process.StartIn fo = startInfo;
> process.Start() ;
>
> string s;
> while ((s = process.Standar dOutput.ReadLin e()) != null)
> {
> //do something with s
> }
> ---------------------------------------------------------------------------------
>
tatamata wrote: Hello. I tried to implement ypour suggestion, but an error apears:
"Exception System.Componen tModel.Win32Exc eption was thrown in debugee:
The specified executable is not a valid Win32 application.
namespace CS_script
{
class MainClass
{
public static void Main(string[] args)
{
System.Diagnost ics.ProcessStar tInfo psi =new
System.Diagnost ics.ProcessStar tInfo();
psi.FileName="m y_script.py";
psi.WorkingDire ctory=Environme nt.CurrentDirec tory;
psi.RedirectSta ndardOutput = true;
psi.WindowStyle = System.Diagnost ics.ProcessWind owStyle.Hidden;
psi.UseShellExe cute = false;
psi.CreateNoWin dow = true;
System.Diagnost ics.Process script;
script = System.Diagnost ics.Process.Sta rt(psi);
System.IO.Strea mReader myOutput = script.Standard Output;
script.WaitForE xit(2000);
if (script.HasExit ed)
{
string output = myOutput.ReadTo End();
//this.processRes ults.Text = output;
}
MessageBox.Show ("finished!" );
}
}
}
When running the program, I have the following error:
"Exception System.Componen tModel.Win32Exc eption was thrown in debugee:
The specified executable is not a valid Win32 application.
StartWithCreate Process()
Start()
Start()
Main() - c:\Documents and Settings\Zlatko \My Documents\Sharp Develop
Projects\CS_scr ipt\CS_script\M ain.cs:32,5 "
I have no means of running C# programs at present and can't claim much
expertise in any case. A guess is that a "valid Win32 application"
means an '.exe' file, not a '.py' file.
You are assuming that a Process object is as smart as the command
interpreter ('cmd.exe') and will know to use 'python.exe' for a file
with a 'py' extension?
What happens if you use 'python.exe' (or 'cmd.exe') as your file and
the script name as argument as in the code I posted?
Gerard
(PS. This group prefers that one doesn't top-post)
