Create windows based DOS or Command Prompt in C#

This topic shows how to Create windows based DOS or Command Prompt in C#.
With this example you can learn, how to read, write data to the command prompt and get data from command prompt and shows on the textbox in C#.

Design a form Create DOS or windows based Command Prompt in C# as shown in figure

Design form to create windows based Command Prompt or DOS in C#

For this add three textboxes

1) txterror (get error from the command prompt or DOS) (Middle TextBox)

2) txtresult (get result from the command prompt or DOS) (Top TextBox)

3) txtcommand (write DOS command to execute) (Bottom TextBox)

System.Diagnostics Namespace – Create windows based DOS or Command Prompt in C#

The System.Diagnostics namespace provides classes that allow you to interact with system processes, event logs, and performance counters.
The System.Diagnostics namespace also provides classes that allow you to debug your application and to trace the execution of your code.

ProcessStartInfo Class – Create windows based DOS or Command Prompt in C#

ProcessStartInfo Class specifies a set of values used when starting a process.
ProcessStartInfo is used in conjunction with the Process component. When you start a process using the Process class, you have access to process information in addition to that available when attaching to a running process.

Write below code inside the form load – Create windows based DOS or Command Prompt in C#

                ProcessStartInfo start_info = new ProcessStartInfo("cmd");
                start_info.UseShellExecute = false;
                start_info.CreateNoWindow = true;
                start_info.RedirectStandardOutput = true;
                start_info.RedirectStandardError = true;
                start_info.RedirectStandardInput = true;

                // Make the process and set its start information.
                Process proc = new Process();
                proc.StartInfo = start_info;

                // Start the process.
                proc.Start();

                // Attach to stdout and stderr.
                StreamReader std_out = proc.StandardOutput;
                System.IO.StreamWriter SW = proc.StandardInput;
                StreamReader std_err = proc.StandardError;
                SW.WriteLine(txtcommand.Text);
                SW.WriteLine("exit");
                // Display the results.
                txtresult.Text = std_out.ReadToEnd();

                // Clean up.
                std_out.Close();
                std_err.Close();
                proc.Close();

ProcessStartInfo start_info = new ProcessStartInfo("cmd");

start_info.UseShellExecute = false;

start_info.CreateNoWindow = true;

start_info.RedirectStandardOutput = true;

start_info.RedirectStandardError = true;

start_info.RedirectStandardInput = true;

// Make the process and set its start information.

Process proc = new Process();

proc.StartInfo = start_info;

// Start the process.

proc.Start();

// Attach to stdout and stderr.

StreamReader std_out = proc.StandardOutput;

System.IO.StreamWriter SW = proc.StandardInput;

StreamReader std_err = proc.StandardError;

SW.WriteLine(txtcommand.Text);

SW.WriteLine("exit");

// Display the results.

txtresult.Text = std_out.ReadToEnd();

// Clean up.

std_out.Close();

std_err.Close();

proc.Close();

Write below code inside the textbox keydown event (ie txtcommand_KeyDown) – Commant prompt in C#

if (e.KeyCode == Keys.Enter)
            {
                txterror.Text = "";
                // Set start information.
                ProcessStartInfo start_info = new ProcessStartInfo("cmd");
                start_info.UseShellExecute = false;
                start_info.CreateNoWindow = true;
                start_info.RedirectStandardOutput = true;
                start_info.RedirectStandardError = true;
                start_info.RedirectStandardInput = true;

                // Make the process and set its start information.
                Process proc = new Process();
                proc.StartInfo = start_info;

                // Start the process.
                proc.Start();

                // Attach to stdout and stderr.
                StreamReader std_out = proc.StandardOutput;
                System.IO.StreamWriter SW = proc.StandardInput;
                StreamReader std_err = proc.StandardError;
                SW.WriteLine(txtcommand.Text);
                SW.WriteLine("exit");

                // Display the results.
                txtresult.Text = std_out.ReadToEnd();
                txterror.Text = std_err.ReadToEnd();

                std_err.Dispose();
                SW.Close();
                // Clean up.
                std_out.Close();
                std_err.Close();
                proc.Close();
            }

if (e.KeyCode == Keys.Enter)

{

txterror.Text = "";

// Set start information.

ProcessStartInfo start_info = new ProcessStartInfo("cmd");

start_info.UseShellExecute = false;

start_info.CreateNoWindow = true;

start_info.RedirectStandardOutput = true;

start_info.RedirectStandardError = true;

start_info.RedirectStandardInput = true;

// Make the process and set its start information.

Process proc = new Process();

proc.StartInfo = start_info;

// Start the process.

proc.Start();

// Attach to stdout and stderr.

StreamReader std_out = proc.StandardOutput;

System.IO.StreamWriter SW = proc.StandardInput;

StreamReader std_err = proc.StandardError;

SW.WriteLine(txtcommand.Text);

SW.WriteLine("exit");

// Display the results.

txtresult.Text = std_out.ReadToEnd();

txterror.Text = std_err.ReadToEnd();

std_err.Dispose();

SW.Close();

// Clean up.

std_out.Close();

std_err.Close();

proc.Close();

}

Create windows based DOS or Command Prompt in C# - Complete Code

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

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

        private void Form1_Load(object sender, EventArgs e)
        {
            // Set start information.

            {
                ProcessStartInfo start_info = new ProcessStartInfo("cmd");
                start_info.UseShellExecute = false;
                start_info.CreateNoWindow = true;
                start_info.RedirectStandardOutput = true;
                start_info.RedirectStandardError = true;
                start_info.RedirectStandardInput = true;

                // Make the process and set its start information.
                Process proc = new Process();
                proc.StartInfo = start_info;

                // Start the process.
                proc.Start();

                // Attach to stdout and stderr.
                StreamReader std_out = proc.StandardOutput;
                System.IO.StreamWriter SW = proc.StandardInput;
                StreamReader std_err = proc.StandardError;
                SW.WriteLine(txtcommand.Text);
                SW.WriteLine("exit");
                // Display the results.
                txtresult.Text = std_out.ReadToEnd();

                // Clean up.
                std_out.Close();
                std_err.Close();
                proc.Close();
            }

        }

        private void txtcommand_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                txterror.Text = "";
                // Set start information.
                ProcessStartInfo start_info = new ProcessStartInfo("cmd");
                start_info.UseShellExecute = false;
                start_info.CreateNoWindow = true;
                start_info.RedirectStandardOutput = true;
                start_info.RedirectStandardError = true;
                start_info.RedirectStandardInput = true;

                // Make the process and set its start information.
                Process proc = new Process();
                proc.StartInfo = start_info;

                // Start the process.
                proc.Start();

                // Attach to stdout and stderr.
                StreamReader std_out = proc.StandardOutput;
                System.IO.StreamWriter SW = proc.StandardInput;
                StreamReader std_err = proc.StandardError;
                SW.WriteLine(txtcommand.Text);
                SW.WriteLine("exit");

                // Display the results.
                txtresult.Text = std_out.ReadToEnd();
                txterror.Text = std_err.ReadToEnd();

                std_err.Dispose();
                SW.Close();
                // Clean up.
                std_out.Close();
                std_err.Close();
                proc.Close();
            }
        }

    }
}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;

using System.Diagnostics;

namespace textc

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

// Set start information.

{

ProcessStartInfo start_info = new ProcessStartInfo("cmd");

start_info.UseShellExecute = false;

start_info.CreateNoWindow = true;

start_info.RedirectStandardOutput = true;

start_info.RedirectStandardError = true;

start_info.RedirectStandardInput = true;

// Make the process and set its start information.

Process proc = new Process();

proc.StartInfo = start_info;

// Start the process.

proc.Start();

// Attach to stdout and stderr.

StreamReader std_out = proc.StandardOutput;

System.IO.StreamWriter SW = proc.StandardInput;

StreamReader std_err = proc.StandardError;

SW.WriteLine(txtcommand.Text);

SW.WriteLine("exit");

// Display the results.

txtresult.Text = std_out.ReadToEnd();

// Clean up.

std_out.Close();

std_err.Close();

proc.Close();

}

private void txtcommand_KeyDown(object sender, KeyEventArgs e)

{

if (e.KeyCode == Keys.Enter)

{

txterror.Text = "";

// Set start information.

ProcessStartInfo start_info = new ProcessStartInfo("cmd");

start_info.UseShellExecute = false;

start_info.CreateNoWindow = true;

start_info.RedirectStandardOutput = true;

start_info.RedirectStandardError = true;

start_info.RedirectStandardInput = true;

// Make the process and set its start information.

Process proc = new Process();

proc.StartInfo = start_info;

// Start the process.

proc.Start();

// Attach to stdout and stderr.

StreamReader std_out = proc.StandardOutput;

System.IO.StreamWriter SW = proc.StandardInput;

StreamReader std_err = proc.StandardError;

SW.WriteLine(txtcommand.Text);

SW.WriteLine("exit");

// Display the results.

txtresult.Text = std_out.ReadToEnd();

txterror.Text = std_err.ReadToEnd();

std_err.Dispose();

SW.Close();

// Clean up.

std_out.Close();

std_err.Close();

proc.Close();

}

Create windows based Command Prompt or DOS in C# : Step 1

Create windows based Command Prompt or DOS in C# : Step 2

Create windows based Command Prompt or DOS in C# : Step 3

Create windows based DOS or Command Prompt in C#

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Create windows based DOS or Command Prompt in C#

Design a form Create DOS or windows based Command Prompt in C# as shown in figure

System.Diagnostics Namespace – Create windows based DOS or Command Prompt in C#

ProcessStartInfo Class – Create windows based DOS or Command Prompt in C#

Create windows based DOS or Command Prompt in C# - Complete Code

Create windows based DOS or Command Prompt in C#

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