problem with poocess Start in c#

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hi

please fint the Below Code some time it work fine but some time it Exit the Proce below is the Code

C#

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
   BackgroundWorker worker = sender as BackgroundWorker;
   string result;
   ProcessStartInfo start = new ProcessStartInfo();
   string myExeDir = (new FileInfo(System.Reflection.Assembly.GetEntryAssembly().Location)).Directory + @"\" + "Python.exe";
   start.FileName = myExeDir;
   start.Arguments = (Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + @"\" + "TA" + @"\" + "Tool" + @"\" + strSelectedTreeNade + ".py");
   start.ErrorDialog = false;
   start.UseShellExecute = false;
   start.RedirectStandardError = true;
   start.RedirectStandardInput = true;
   start.RedirectStandardOutput = true;
   start.CreateNoWindow = true;
   StreamReader reader = null;
   //listLog.Items.Clear();
   listLog.Invoke(new Action(() => listLog.Items.Clear()));
   // reading the file
   string str_TestSuiteName1 = strSelectedTreeNade;
   List<string> m_CombinedTestsuiteNames = new List<string>();
   using (Process process = Process.Start(start))
   {
      using (reader = process.StandardOutput)
      {
         // ...
      }
   }
}

the proces.StandardOutput Become Null..

[Edit]
- Added pre tag to have correct code formatting
- Replaced "\\" with @"\" equivalent so that string delimiters are not messed up
[/Edit]

Posted 25-Feb-14 22:20pm

rahuls1

Updated 25-Feb-14 22:27pm

phil.o

v2

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Vedat Ozan Oner · Answer 1 · 2014-02-25T23:39:00

I'm not sure but your error may be related to this line:

Quote:
using (reader = process.StandardOutput)

'using' will try to dispose process.StandardOutput at the enclosing brace. But, I expect that it is the responsibility of 'Process'.
See the following example. You can adapt it to your code.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Test_ProcStart
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            InitOthers();
        }

        private void InitOthers()
        {
            this.bg.DoWork += bg_DoWork;
            this.textBox_Input.Text = @"cmd /C dir d:\";
        }


        void bg_DoWork(object sender, DoWorkEventArgs e)
        {
            string a = e.Argument.ToString();
            string fn = a.Split(' ').First();
            string args = a.Substring(a.IndexOf(' ') + 1);
            // WORKS WELL
            ProcessStartInfo si = new ProcessStartInfo()
            {
                FileName = fn,
                Arguments = args,
                CreateNoWindow = true,
                RedirectStandardError = true,
                RedirectStandardInput = false,
                RedirectStandardOutput = true,
                UseShellExecute = false
            };
            using (Process p = new Process())
            {
                p.StartInfo = si;
                p.Start();
                this.Invoke(new Action(() =>
                {
                    this.textBox_Output.Text = p.StandardOutput.ReadToEnd();
                }));
                this.Invoke(new Action(() =>
                {
                    this.textBox_Error.Text = p.StandardError.ReadToEnd();
                }));
            }
        }

        BackgroundWorker bg = new BackgroundWorker();

        private void button_Run_Click(object sender, EventArgs e)
        {
            bg.RunWorkerAsync(this.textBox_Input.Text);
        }
    }
}